C#•14mo ago

✅ Adding A Project Reference

https://learn.microsoft.com/en-us/troubleshoot/developer/visualstudio/csharp/language-compilers/store-custom-information-config-file#:~:text=Add%20a%20reference,select%20OK. According to this section, I'm supposed to be able to add a reference for my App.config file. However, when I right click my project, there is no Add Reference button to click. I tried going to Add > Project Reference, but there is no .Net tab to select from. I'm honestly lost on how to do this. I'm starting on the C# Academy Project; Coding Tracker and it's one of the initial steps which is where I go the link from. Thanks in advance

240 Replies

Pobiega•14mo ago

"Add -> Project Reference" is for referencing other projects, not individual files. "App.config" is a .net framework thing, is this a framework project?

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

I fell asleep at my computer. Why was the thread marked solved? It’s a C# Console Based application project given as the final beginner section project on the C# Academy Website.

Pobiega•14mo ago

Yeah but is it a .net framework project or not?

Mekasu0124OP•14mo ago

https://www.thecsharpacademy.com/project/13 I’m not entirely sure how to answer that. It is using Net6.0

Pobiega•14mo ago

This is not how we recommend doing configuration anymore, and if its using modern .NET you should absolutely not be using .config files

Mekasu0124OP•14mo ago

Oh I didn’t know that. I was just following and completing the projects they had listed out.

Pobiega•14mo ago

Well, thats what that page tells you to do indeed...

Mekasu0124OP•14mo ago

Each project comes with requirements and challenges. So I do the requirements first and then submit for review. Once complete I go back and try the challenges

Pobiega•14mo ago

so you have two options - Follow their recommendations and use the "old" style configuration - ignore their recommendations and use the more modern style of configuration

Mekasu0124OP•14mo ago

I’d love to use more recommended methods but as stated here by the owner of the discord and site, if I don’t follow their requirements for the requirements section of the project then it will get failed

Pobiega•14mo ago

ok well that answers that question

Mekasu0124OP•14mo ago

So how would I go about adding the project reference like they want?

Pobiega•14mo ago

well, https://learn.microsoft.com/en-us/troubleshoot/developer/visualstudio/csharp/language-compilers/store-custom-information-config-file refers to .NET framework, not .NET 5+ so to follow their tutorial exactly, you'd need to use .net framework that said, I do believe there is a nuget for config manager in modern .NET

Pobiega•14mo ago

https://www.nuget.org/packages/System.Configuration.ConfigurationManager/6.0.1 yep

System.Configuration.ConfigurationManager 6.0.1

Provides types that support using configuration files. Commonly Used Types: System.Configuration.Configuration System.Configuration.ConfigurationManager

Mekasu0124OP•14mo ago

Ok. Can you unmake this post solved? I’ll check out the nuget package later today after work and get back to you if that’s alright

Pobiega•14mo ago

I didn't mark it

Mekasu0124OP•14mo ago

I didn’t either

Pobiega•14mo ago

try editing the title

Mekasu0124OP•14mo ago

Thank you and I’ll get back to you this afternoon. Thanks for your help so far!

Pobiega•14mo ago

Looking closer at the project page, it doesnt explicitly say you NEED to use the config manager it just links to that as a suggested resource you could thus implement this using the modern ConfigurationBuilder and still use xml files

Pobiega•14mo ago

https://learn.microsoft.com/en-us/dotnet/core/extensions/configuration#basic-example

Configuration - .NET

Learn how to use the Configuration API to configure .NET applications. Explore various inbuilt configuration providers.

Unknown User•14mo ago

Message Not Public

Mekasu0124OP•14mo ago

All good. And so far it’s public and free

Pobiega•14mo ago

there is no authorization to reach the pages, but the links is behind a registration portal

Mekasu0124OP•14mo ago

All I know is it says "You'll need to create a configuration file that you'll contain your database path and connection strings." under the requirements

Pobiega•14mo ago

yep thats what I gathered as well

Mekasu0124OP•14mo ago

I was just assuming that since that was the method they linked to that project, that that was how they wanted us to go about it

Pobiega•14mo ago

so you could easily do that with xml on the modern config builder, or even use json if you'd prefer that tbh, ask on their discord say that "Hey I'm doing this with .net 6, and Microsoft.Extensions.Configuration seems to be the more modern way of doing configs, do we have to use ConfigrationManager?"

Mekasu0124OP•14mo ago

ok I've asked in the interum, can I ask another question? that's unrelated

Pobiega•14mo ago

yes

Mekasu0124OP•14mo ago

public static void CreateDatabase()
{
    Console.WriteLine("Creating Database");
    SQLiteConnection.CreateFile("habits.db");

    using (var sqlite = new SQLiteConnection(@"Data Source=habits.db"))
    {
        sqlite.Open();
        string sql = @"CREATE TABLE IF NOT EXISTS 
                        [habits] (
                        [Id] INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
                        [Name] VARCHAR(70) NULL, 
                        [Date] VARCHAR(50) NULL, 
                        [Count] INTEGER NULL, 
                        [Description] VARCHAR(2048))";
        SQLiteCommand command = new SQLiteCommand(sql, sqlite);
        command.ExecuteNonQuery();
    }
        
    Console.WriteLine("New Database Created");
}
public static void DeleteEntry(Habit habit)
{
    using (SQLiteConnection sqlite = new SQLiteConnection(@"Data Source=habits.db"))
    {
        using (SQLiteCommand cmd = new SQLiteCommand(sqlite))
        {
            sqlite.Open();

            cmd.CommandText = "DELETE FROM habits WHERE Name=@CurrentName";
            cmd.Parameters.Add(new SQLiteParameter("@CurrentName", habit.Name));
            cmd.ExecuteNonQuery();

            sqlite.Close();
        }
    }
}

public static void CreateDatabase()
{
    Console.WriteLine("Creating Database");
    SQLiteConnection.CreateFile("habits.db");

    using (var sqlite = new SQLiteConnection(@"Data Source=habits.db"))
    {
        sqlite.Open();
        string sql = @"CREATE TABLE IF NOT EXISTS 
                        [habits] (
                        [Id] INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
                        [Name] VARCHAR(70) NULL, 
                        [Date] VARCHAR(50) NULL, 
                        [Count] INTEGER NULL, 
                        [Description] VARCHAR(2048))";
        SQLiteCommand command = new SQLiteCommand(sql, sqlite);
        command.ExecuteNonQuery();
    }
        
    Console.WriteLine("New Database Created");
}
public static void DeleteEntry(Habit habit)
{
    using (SQLiteConnection sqlite = new SQLiteConnection(@"Data Source=habits.db"))
    {
        using (SQLiteCommand cmd = new SQLiteCommand(sqlite))
        {
            sqlite.Open();

            cmd.CommandText = "DELETE FROM habits WHERE Name=@CurrentName";
            cmd.Parameters.Add(new SQLiteParameter("@CurrentName", habit.Name));
            cmd.ExecuteNonQuery();

            sqlite.Close();
        }
    }
}

when I delete an item from the database, how do I get the Id's of the remaining items to decrease by one? What I mean is, if I store 4 items, they have an Id of 1, 2, 3, and 4. If I go through my menu options of my console project and selected to delete number 2, then I'm left with 1, 3, and 4 and when I try to delete 3, this function is triggered

public static int ValidateIndexSelection(int selectedIndex, List<Habit> habits, string sentence)
{
    List<int> currentIds = new();

    for (int i = 0; i < habits.Count; i++)
    {
        int habId = i + 1;
        currentIds.Add(habId);
    }

    while (!currentIds.Contains(selectedIndex))
    {
        Console.ForegroundColor = ConsoleColor.Red;
        Console.WriteLine("[Error] Selected Number Does Not Exist");

        Console.ForegroundColor = ConsoleColor.White;
        Console.Write($"{sentence}: ");

        string input = Console.ReadLine();
        selectedIndex = ValidateNumericInput(input, "Your Selection");
        return ValidateIndexSelection(selectedIndex, habits, sentence);
    }

    return selectedIndex;
}

public static int ValidateIndexSelection(int selectedIndex, List<Habit> habits, string sentence)
{
    List<int> currentIds = new();

    for (int i = 0; i < habits.Count; i++)
    {
        int habId = i + 1;
        currentIds.Add(habId);
    }

    while (!currentIds.Contains(selectedIndex))
    {
        Console.ForegroundColor = ConsoleColor.Red;
        Console.WriteLine("[Error] Selected Number Does Not Exist");

        Console.ForegroundColor = ConsoleColor.White;
        Console.Write($"{sentence}: ");

        string input = Console.ReadLine();
        selectedIndex = ValidateNumericInput(input, "Your Selection");
        return ValidateIndexSelection(selectedIndex, habits, sentence);
    }

    return selectedIndex;
}

Pobiega•14mo ago

when I delete an item from the database, how do I get the Id's of the remaining items to decrease by one?

you don't thats not how IDs work

Mekasu0124OP•14mo ago

ok then my trigger function si written wrong then

Pobiega•14mo ago

trigger? I mean, you wouldn't validate the ID before querying the database

Mekasu0124OP•14mo ago

the helper function. ValidateIndexSelection. Instead of building the Id's based off the for-loop, it should be built based off the items Id's

Pobiega•14mo ago

if you want to see if there is an item with id 2 in the database, you ask the database

Mekasu0124OP•14mo ago

right. In my DeleteHabit() function, it gathers the list of habits with List<Habit> currentHabits = Database.GetHabits(); This query's the database for the currently tracked habits and returns them. Then it prints that chart of those currentHabits and prompts the user for their selection of which Id they want to delete and passes the user's input, the list of currentHabits, and the action string to the helper function ValidateIndexSelection. Since I'm already returning the it'd in the Database.GetHabits() function, I can build my list to check from using those item's id's instead of using the for-loops counting index

Pobiega•14mo ago

yeah that sounds like a good idea. Im not sure why you're building a new list actually

Mekasu0124OP•14mo ago

I wrote my helper function wrong

Pobiega•14mo ago

List<int> currentIds = new();
  for (int i = 0; i < habits.Count; i++)
    {
        int habId = i + 1;
        currentIds.Add(habId);
    }

List<int> currentIds = new();
  for (int i = 0; i < habits.Count; i++)
    {
        int habId = i + 1;
        currentIds.Add(habId);
    }

this is very weird. If you just want the IDs of all existing items, use habits.Select(x => x.Id).ToHashSet();

Mekasu0124OP•14mo ago

public static void DeleteHabit()
{
    Console.Clear();
    Console.WriteLine("------------------------");
    Console.WriteLine("Deleting A Current Habit");
    Console.WriteLine("------------------------");
    Console.WriteLine("Select A Habit Below To Delete");

    List<Habit> currentHabits = Database.GetHabits();
    Helpers.PrintHabitChart(currentHabits);

    Console.Write("Your Selection: ");
    string input = Console.ReadLine();
    int selectedIndex = Helpers.ValidateNumericInput(input, "Your Selection");
    selectedIndex = Helpers.ValidateIndexSelection(selectedIndex, currentHabits, "Your Selection");

    Habit selectedHabit = Database.GetSelectedHabit(selectedIndex);

    Database.DeleteEntry(selectedHabit);

    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine("Your Habit Has Been Deleted");
    Thread.Sleep(2000);
    Console.Clear();
    Console.ForegroundColor = ConsoleColor.White;
    MainMenu.ShowMenu();
}

public static void DeleteHabit()
{
    Console.Clear();
    Console.WriteLine("------------------------");
    Console.WriteLine("Deleting A Current Habit");
    Console.WriteLine("------------------------");
    Console.WriteLine("Select A Habit Below To Delete");

    List<Habit> currentHabits = Database.GetHabits();
    Helpers.PrintHabitChart(currentHabits);

    Console.Write("Your Selection: ");
    string input = Console.ReadLine();
    int selectedIndex = Helpers.ValidateNumericInput(input, "Your Selection");
    selectedIndex = Helpers.ValidateIndexSelection(selectedIndex, currentHabits, "Your Selection");

    Habit selectedHabit = Database.GetSelectedHabit(selectedIndex);

    Database.DeleteEntry(selectedHabit);

    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine("Your Habit Has Been Deleted");
    Thread.Sleep(2000);
    Console.Clear();
    Console.ForegroundColor = ConsoleColor.White;
    MainMenu.ShowMenu();
}

this is the function that is executed when the user selects to delete a habit from the menu.

public static Habit GetSelectedHabit(int index)
{
    Habit selectedHabit = new();

    using (SQLiteConnection sqlite = new SQLiteConnection(@"Data Source=habits.db"))
    {
        using (SQLiteCommand cmd = new SQLiteCommand(sqlite))
        {
            SQLiteDataReader reader;

            sqlite.Open();

            cmd.CommandText = "SELECT * FROM habits WHERE Id=@SelectedID";
            cmd.Parameters.Add(new SQLiteParameter("@SelectedID", index));

            reader = cmd.ExecuteReader();

            try
            {
                while (reader.Read())
                {
                    int id = int.Parse(reader["Id"].ToString());
                    string name = reader["Name"].ToString();
                    DateTime date = DateTime.Parse(reader["Date"].ToString());
                    int count = int.Parse(reader["Count"].ToString());
                    string description = reader["Description"].ToString();

                    selectedHabit = new()
                    {
                        Id = id,
                        Name = name,
                        Date = date,
                        Count = count,
                        Description = description
                    };
                }

                sqlite.Close();
            }
            catch (SQLiteException e)
            {
                Console.WriteLine(e.Message);
            }
        }
    }

    return selectedHabit;
}

public static Habit GetSelectedHabit(int index)
{
    Habit selectedHabit = new();

    using (SQLiteConnection sqlite = new SQLiteConnection(@"Data Source=habits.db"))
    {
        using (SQLiteCommand cmd = new SQLiteCommand(sqlite))
        {
            SQLiteDataReader reader;

            sqlite.Open();

            cmd.CommandText = "SELECT * FROM habits WHERE Id=@SelectedID";
            cmd.Parameters.Add(new SQLiteParameter("@SelectedID", index));

            reader = cmd.ExecuteReader();

            try
            {
                while (reader.Read())
                {
                    int id = int.Parse(reader["Id"].ToString());
                    string name = reader["Name"].ToString();
                    DateTime date = DateTime.Parse(reader["Date"].ToString());
                    int count = int.Parse(reader["Count"].ToString());
                    string description = reader["Description"].ToString();

                    selectedHabit = new()
                    {
                        Id = id,
                        Name = name,
                        Date = date,
                        Count = count,
                        Description = description
                    };
                }

                sqlite.Close();
            }
            catch (SQLiteException e)
            {
                Console.WriteLine(e.Message);
            }
        }
    }

    return selectedHabit;
}

it then calls this function to get the list of currentHabits

public static int ValidateIndexSelection(int selectedIndex, List<Habit> habits, string sentence)
{
    List<int> currentIds = new();

    for (int i = 0; i < habits.Count; i++)
    {
        int habId = habits[i].Id;
        currentIds.Add(habId);
    }

    while (!currentIds.Contains(selectedIndex))
    {
        Console.ForegroundColor = ConsoleColor.Red;
        Console.WriteLine("[Error] Selected Number Does Not Exist");

        Console.ForegroundColor = ConsoleColor.White;
        Console.Write($"{sentence}: ");

        string input = Console.ReadLine();
        selectedIndex = ValidateNumericInput(input, "Your Selection");
        return ValidateIndexSelection(selectedIndex, habits, sentence);
    }

    return selectedIndex;
}

public static int ValidateIndexSelection(int selectedIndex, List<Habit> habits, string sentence)
{
    List<int> currentIds = new();

    for (int i = 0; i < habits.Count; i++)
    {
        int habId = habits[i].Id;
        currentIds.Add(habId);
    }

    while (!currentIds.Contains(selectedIndex))
    {
        Console.ForegroundColor = ConsoleColor.Red;
        Console.WriteLine("[Error] Selected Number Does Not Exist");

        Console.ForegroundColor = ConsoleColor.White;
        Console.Write($"{sentence}: ");

        string input = Console.ReadLine();
        selectedIndex = ValidateNumericInput(input, "Your Selection");
        return ValidateIndexSelection(selectedIndex, habits, sentence);
    }

    return selectedIndex;
}

then when the user makes a selection, their input goes through a validation

Pobiega•14mo ago

right yeah okay here is what I would do instead of making an ID list, just use the list of habits you already have

Mekasu0124OP•14mo ago

it displays correctly in the table that is printed to the console, however, I messed up my validation function by using the int habId = i + 1 instead of int habId = habits[i].Id;

Pobiega•14mo ago

so if you want the ID to match, check with habits.FirstOrDefault(x => x.Id == selectedIndex); if thats not null, there was a match if its null, no match no that wouldn't work either habits[i] the i doesnt match the id in the database oh nvm, right youre picking an index from the list, not the ID and then getting the ID from there to pass to delete. yeah that works

Mekasu0124OP•14mo ago

public static int ValidateIndexSelection(int selectedIndex, List<Habit> habits, string sentence)
{
    while (habits.FirstOrDefault(x => x.Id == selectedIndex) == null)
    {
        Console.ForegroundColor = ConsoleColor.Red;
        Console.WriteLine("[Error] Selected Number Does Not Exist");

        Console.ForegroundColor = ConsoleColor.White;
        Console.Write($"{sentence}: ");

        string input = Console.ReadLine();
        selectedIndex = ValidateNumericInput(input, "Your Selection");
        return ValidateIndexSelection(selectedIndex, habits, sentence);
    }

    return selectedIndex;
}

public static int ValidateIndexSelection(int selectedIndex, List<Habit> habits, string sentence)
{
    while (habits.FirstOrDefault(x => x.Id == selectedIndex) == null)
    {
        Console.ForegroundColor = ConsoleColor.Red;
        Console.WriteLine("[Error] Selected Number Does Not Exist");

        Console.ForegroundColor = ConsoleColor.White;
        Console.Write($"{sentence}: ");

        string input = Console.ReadLine();
        selectedIndex = ValidateNumericInput(input, "Your Selection");
        return ValidateIndexSelection(selectedIndex, habits, sentence);
    }

    return selectedIndex;
}

so like this?

Pobiega•14mo ago

depends? if there are 3 items (ids 7 8 9), what do you want the user to enter to delete the 2nd item? 1, 2 or 8?

Mekasu0124OP•14mo ago

They enter the Id of the habit shown in the table

Pobiega•14mo ago

oh, so it is selectedId then, not selectedIndex index != id

Mekasu0124OP•14mo ago

I mean yea you're right. I can change the variable name

Pobiega•14mo ago

that would probably be good to increase readability but yeah, then that would work you can actually simplify it further while (habits.FirstOrDefault(x => x.Id == selectedIndex) == null) can be...

 while (!habits.Any(x => x.Id == selectedIndex))

 while (!habits.Any(x => x.Id == selectedIndex))

I prefer that I think since you want a boolean

Mekasu0124OP•14mo ago

- public static void DeleteEntry(Habit habit)
+ public static void DeleteEntry(int selectedId)
  {
    using (SQLiteConnection sqlite = new SQLiteConnection(@"Data Source=habits.db"))
    {
        using (SQLiteCommand cmd = new SQLiteCommand(sqlite))
        {
            sqlite.Open();

-           cmd.CommandText = "DELETE FROM habits WHERE Name=@CurrentName";
+           cmd.CommandText = "DELETE FROM habits WHERE Id=@selectedId";
-           cmd.Parameters.Add(new SQLiteParameter("@CurrentName", habit.Name));
+           cmd.Parameters.Add(new SQLiteParameter("@selectedId", selectedId));
            cmd.ExecuteNonQuery();

            sqlite.Close();
        }
    }
}

- public static void DeleteEntry(Habit habit)
+ public static void DeleteEntry(int selectedId)
  {
    using (SQLiteConnection sqlite = new SQLiteConnection(@"Data Source=habits.db"))
    {
        using (SQLiteCommand cmd = new SQLiteCommand(sqlite))
        {
            sqlite.Open();

-           cmd.CommandText = "DELETE FROM habits WHERE Name=@CurrentName";
+           cmd.CommandText = "DELETE FROM habits WHERE Id=@selectedId";
-           cmd.Parameters.Add(new SQLiteParameter("@CurrentName", habit.Name));
+           cmd.Parameters.Add(new SQLiteParameter("@selectedId", selectedId));
            cmd.ExecuteNonQuery();

            sqlite.Close();
        }
    }
}

that means I can ~~simply~~ re-write this too which also negates my DeleteEntry function from having to query my database twice.

Pobiega•14mo ago

I'm not sure you needed that in the first place either, you could have fetched the desired item from the habits list itself but yeah, this works

Mekasu0124OP•14mo ago

what do you mean? This is my first time working with a database in c#. It's so different, but yet semi-similar to python

Pobiega•14mo ago

This is your delete method the way it looked before

public static void DeleteHabit()
{
    Console.Clear();
    Console.WriteLine("------------------------");
    Console.WriteLine("Deleting A Current Habit");
    Console.WriteLine("------------------------");
    Console.WriteLine("Select A Habit Below To Delete");

    List<Habit> currentHabits = Database.GetHabits();
    Helpers.PrintHabitChart(currentHabits);

    Console.Write("Your Selection: ");
    string input = Console.ReadLine();
    int selectedIndex = Helpers.ValidateNumericInput(input, "Your Selection");
    selectedIndex = Helpers.ValidateIndexSelection(selectedIndex, currentHabits, "Your Selection");

    Habit selectedHabit = Database.GetSelectedHabit(selectedIndex);

    Database.DeleteEntry(selectedHabit);

    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine("Your Habit Has Been Deleted");
    Thread.Sleep(2000);
    Console.Clear();
    Console.ForegroundColor = ConsoleColor.White;
    MainMenu.ShowMenu();
}

public static void DeleteHabit()
{
    Console.Clear();
    Console.WriteLine("------------------------");
    Console.WriteLine("Deleting A Current Habit");
    Console.WriteLine("------------------------");
    Console.WriteLine("Select A Habit Below To Delete");

    List<Habit> currentHabits = Database.GetHabits();
    Helpers.PrintHabitChart(currentHabits);

    Console.Write("Your Selection: ");
    string input = Console.ReadLine();
    int selectedIndex = Helpers.ValidateNumericInput(input, "Your Selection");
    selectedIndex = Helpers.ValidateIndexSelection(selectedIndex, currentHabits, "Your Selection");

    Habit selectedHabit = Database.GetSelectedHabit(selectedIndex);

    Database.DeleteEntry(selectedHabit);

    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine("Your Habit Has Been Deleted");
    Thread.Sleep(2000);
    Console.Clear();
    Console.ForegroundColor = ConsoleColor.White;
    MainMenu.ShowMenu();
}

currentHabits is a list of all habits, as fetched from your database. We don't need to query the database a second time to get an item we already have in that list we can just do var selectedHabit = currentHabits.FirstOrDefault(x => x.Id == selectedId);

Mekasu0124OP•14mo ago

right. I removed the line Habit selectedHabit = Database.GetSelectedHabit(selectedIndex); and just passed the selectedId to the Database.DeleteEntry(selectedHabit); to negate doing that or am I missing what you're saying?

Pobiega•14mo ago

well, both are valid you can fetch the ID and pass the ID to your database.delete method, thats fine but since you already have the the Habit that you want to delete, you could have kept the old delete method (that took a Habit, not an id) that would also work, same amount of database queries it was specifically Habit selectedHabit = Database.GetSelectedHabit(selectedIndex); that could be removed, as you already had that habit in memory, in this method

Mekasu0124OP•14mo ago

oh ok. I got you

Pobiega•14mo ago

the benefit of that is it makes it harder to accidentally pass the wrong id database.DeleteEntry(6); is valid, but might do the wrong thing Database.DeleteEntry(habit); is harder to get wrong, as its unlikely you created a new habit and manually gave it the wrong id. In fact, you can make that impossible. both are perfectly fine for a beginner thou, this is something I think about as its the stuff I work with daily and trying to design the "perfect" interfaces for my coworkers to use 🙂

Mekasu0124OP•14mo ago

Habit habit = currentHabits.Where(x => x.Id == selectedId);
Database.DeleteEntry(habit);

Habit habit = currentHabits.Where(x => x.Id == selectedId);
Database.DeleteEntry(habit);

so I should've done something like this instead?

Pobiega•14mo ago

not should've per se, but could've. And First instead of Where (Where gives you 0..N results, First gives you 1)

Mekasu0124OP•14mo ago

so Any instead of Where

Pobiega•14mo ago

no, Any returns true or false it checks if "any item matches this filter" first gives back the first item that does match the filter, and throws an error if no item did

Mekasu0124OP•14mo ago

oh ok so First instead of Where

Pobiega•14mo ago

yeah where gives you back ALL the items that matched the filter 🙂

Mekasu0124OP•14mo ago

and First gives back the first matching, yea?

Pobiega•14mo ago

granted, in this situation that would be 0 or 1, but its still in an enumerable, instead of just as a direct reference yes

Mekasu0124OP•14mo ago

oh ok

public static void DeleteHabit()
{
  var habit = currentHabits.First(x => x.Id == selectedId);
  Database.DeleteEntry(habit);
}
public static void Datbase.DeleteEntry(Habit habit)
{
  using SQLiteConnection sqlite = new SQLiteConnection(@"Data Source=habits.db");
  using SQLiteCommand cmd = new SQLiteCommand(sqlite);
  
  sqlite.Open();
  cmd.CommandText = "DELETE FROM habits WHERE Id=@selectedId";
  cmd.Parameters.AddWithValue("@selectedId", habit.Id);
  cmd.ExecuteNonQuery();
}

public static void DeleteHabit()
{
  var habit = currentHabits.First(x => x.Id == selectedId);
  Database.DeleteEntry(habit);
}
public static void Datbase.DeleteEntry(Habit habit)
{
  using SQLiteConnection sqlite = new SQLiteConnection(@"Data Source=habits.db");
  using SQLiteCommand cmd = new SQLiteCommand(sqlite);
  
  sqlite.Open();
  cmd.CommandText = "DELETE FROM habits WHERE Id=@selectedId";
  cmd.Parameters.AddWithValue("@selectedId", habit.Id);
  cmd.ExecuteNonQuery();
}

so this would be the more efficient alternative

Pobiega•14mo ago

same efficiency, just harder to accidentally fuck up this is a good quality in a codebase 🙂

Mekasu0124OP•14mo ago

I got you. Cool. thank you 🙂

Mekasu0124OP•14mo ago

as far as which config file style to use from earlier in this post, this is the only response I've received since asking about it

Pobiega•14mo ago

hm well, his words dont confirm or deny he just says "a configuration manager of some sort" that could be Microsoft.Extensions.Configuration, or it could be ConfigurationManager. he is also wrong about the config being provided, its not you're supposed to make it

Mekasu0124OP•14mo ago

ok I'm going to look at other entries and see how they went abou tit so from what I can see, a lot of users went with an App.config xml file.

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key ="connString" value="Data Source=TrackingData.db"/>
    <add key ="DBLocation" value="TrackingData.db"/>
  </appSettings>
</configuration>

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key ="connString" value="Data Source=TrackingData.db"/>
    <add key ="DBLocation" value="TrackingData.db"/>
  </appSettings>
</configuration>

like that. I can't see what dependencies they used though

Pobiega•14mo ago

if thats their file, its almost guaranteed to be ConfigurationManager thats exactly how it structures things

Mekasu0124OP•14mo ago

ok then i'll have to do that

Pobiega•14mo ago

yep, go for it you'll learn the new way eventually anyways, when you start with asp.net

Mekasu0124OP•14mo ago

does that ivolve adding a project reference though?

Pobiega•14mo ago

yes I linked you to it before https://discord.com/channels/143867839282020352/1158618082202353675/1158685916794208286

MODiX•14mo ago

Pobiega

https://www.nuget.org/packages/System.Configuration.ConfigurationManager/6.0.1 yep

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Mekasu0124OP•14mo ago

ok ty

Pobiega•14mo ago

its a nuget reference thou not a project reference

Mekasu0124OP•14mo ago

ok I'll figure it out after class

Pobiega•14mo ago

I'm sure you've added package references before. VS/Rider both have built-in GUIs for it, and dotnet add package <package name> works too

Mekasu0124OP•14mo ago

so that makes this a .NET framework project. I tried to follow the tutorial, but I still haven't gotten past this part. https://learn.microsoft.com/en-us/troubleshoot/developer/visualstudio/csharp/language-compilers/store-custom-information-config-file#:~:text=Add%20a%20reference,select%20OK. So is this where https://www.nuget.org/packages/System.Configuration.ConfigurationManager/6.0.1#readme-body-tab this package comes into play?

Pobiega•14mo ago

no, it doesnt there is a version of ConfigurationManager available for .net 6 its just an updated version of the old one, so it behaves exactly as that one did

Mekasu0124OP•14mo ago

this one?

Pobiega•14mo ago

yes the top one, you want version 6 as you are on .NET 6 version 7.* is for .NET 7 etc

Mekasu0124OP•14mo ago

ok I've got it installed right

Pobiega•14mo ago

so 6.0.1 is your latest

Mekasu0124OP•14mo ago

right

Pobiega•14mo ago

so, now you have access to the ConfigurationManager class that means you can skip step 10 in that guide

Mekasu0124OP•14mo ago

ok awesome. thank you

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

understandable. The person who responded isn't the owner of the academia so I took what they said as a grain of salt and am just going with the nuget package manager that Pobeiga discussed earlier. I'm just currently in class and can't do anything with it yet. Apologies. I'm currently trying to figure out how in the hell sin ^ -1 (4/7) = 0.61 when if you divide 4 by 7 you get 0.57

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

I'm trying to figure out how this equation equals 0.61

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

idk what aresin is

Pobiega•14mo ago

arcsin

Unknown User•14mo ago

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Pobiega•14mo ago

yes the inverse sine

Mekasu0124OP•14mo ago

I have still yet to get a solid answer to my greatest lifetime question.

What does Trig, Calculus, and Physics have to do with being getting a Bachelor's in Computer Science with a focus in Software Development and Cyber Security

Unknown User•14mo ago

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Pobiega•14mo ago

for computer science, math is important. For software development, its not really.

Unknown User•14mo ago

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Pobiega•14mo ago

kekw

Unknown User•14mo ago

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Pobiega•14mo ago

(obviously in stuff like 3d games or complicated financial simulations math becomes important again, but for general programming its kinad secondary) cryptography is very reliant on math thou so if you wanna dive into that (as part of security?) then you'll need some math

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

omg of all the times I have sat here and gave up on assignments because I couldn't figure out the solution. I'm a fucking programmer. what's the evaluate command? !e?

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

MODiX•14mo ago

TeBeCo

REPL Result: Success

"loul"

"loul"

Result: string

loul

loul

Compile: 366.102ms | Execution: 27.277ms | React with ❌ to remove this embed.

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

oh jk it only does c# either way, I can use Python to give me my answers 😂

MODiX•14mo ago

TeBeCo

REPL Result: Success

var a = Math.Asin(2.0f/5.0f);
Console.WriteLine(a);
var b = Math.PI - a;
Console.WriteLine(b);

var a = Math.Asin(2.0f/5.0f);
Console.WriteLine(a);
var b = Math.PI - a;
Console.WriteLine(b);

Console Output

0.41151685257088794
2.7300758010189052

0.41151685257088794
2.7300758010189052

Compile: 701.232ms | Execution: 89.251ms | React with ❌ to remove this embed.

Mekasu0124OP•14mo ago

right

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

I'm a programmer lmao I forgot that most languages can do math equations if you set them up correctly I do

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

well no. Not windows terminal. I use command prompt

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

lol wait

Mekasu0124OP•14mo ago

this is what I mean

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

I don't use Windows Powershell only Command Prompot yes 😂 sorry my brain is confused with the math at the moment

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

what does that do?

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

does nothing for me

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

this is the same thing as having Python installed, opening cmd and typing Python. I can now program in python in my windows terminal

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

"profiles": 
{
    "defaults": {},
    "list": 
    [
        {
            "commandline": "%SystemRoot%\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "guid": "{61c54bbd-c2c6-5271-96e7-009a87ff44bf}",
            "hidden": false,
            "name": "Windows PowerShell"
        },
        {
            "commandline": "%SystemRoot%\\System32\\cmd.exe",
            "guid": "{0caa0dad-35be-5f56-a8ff-afceeeaa6101}",
            "hidden": false,
            "name": "Command Prompt"
        },
        {
            "guid": "{b453ae62-4e3d-5e58-b989-0a998ec441b8}",
            "hidden": false,
            "name": "Azure Cloud Shell",
            "source": "Windows.Terminal.Azure"
        },
        {
            "guid": "{16208362-94fc-5b1f-a491-5b2624d5ab56}",
            "hidden": true,
            "name": "Visual Studio Debug Console",
            "source": "VSDebugConsole"
        },
        {
            "guid": "{f1efd43c-0060-5b86-9b25-61a550ff06ea}",
            "hidden": false,
            "name": "Developer Command Prompt for VS 2022",
            "source": "Windows.Terminal.VisualStudio"
        },
        {
            "guid": "{c94bc30e-0dd4-5775-87cc-c6fc534064f5}",
            "hidden": false,
            "name": "Developer PowerShell for VS 2022",
            "source": "Windows.Terminal.VisualStudio"
        }
    ]
},

"profiles": 
{
    "defaults": {},
    "list": 
    [
        {
            "commandline": "%SystemRoot%\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "guid": "{61c54bbd-c2c6-5271-96e7-009a87ff44bf}",
            "hidden": false,
            "name": "Windows PowerShell"
        },
        {
            "commandline": "%SystemRoot%\\System32\\cmd.exe",
            "guid": "{0caa0dad-35be-5f56-a8ff-afceeeaa6101}",
            "hidden": false,
            "name": "Command Prompt"
        },
        {
            "guid": "{b453ae62-4e3d-5e58-b989-0a998ec441b8}",
            "hidden": false,
            "name": "Azure Cloud Shell",
            "source": "Windows.Terminal.Azure"
        },
        {
            "guid": "{16208362-94fc-5b1f-a491-5b2624d5ab56}",
            "hidden": true,
            "name": "Visual Studio Debug Console",
            "source": "VSDebugConsole"
        },
        {
            "guid": "{f1efd43c-0060-5b86-9b25-61a550ff06ea}",
            "hidden": false,
            "name": "Developer Command Prompt for VS 2022",
            "source": "Windows.Terminal.VisualStudio"
        },
        {
            "guid": "{c94bc30e-0dd4-5775-87cc-c6fc534064f5}",
            "hidden": false,
            "name": "Developer PowerShell for VS 2022",
            "source": "Windows.Terminal.VisualStudio"
        }
    ]
},

I have multiple. What am I doing with it now?

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

I did the dotnet tool install -g csharprepl and it works lol

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

yea you got me lost junebug

Mekasu0124OP•14mo ago

what am I doing now 😕 duplicate an entry

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

ok did that. change the first number to 9?

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

I didn't know it was a thing. I just open it from my taskbar, and click the drop down and click cmd

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

ok so now that I have the profile setup, how do I use it? If I do ctrl + shift + 3 on my desktop, it zooms everything the fuck in lol

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

mhm it's a profile with ctrl + shift + 2

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

ok I'm guessing you're not understanding

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

my desktop

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

if I am on the desktop, and I do the command ctrl + shift + 1, it does this

Mekasu0124OP•14mo ago

ctrl + shift + 2

Mekasu0124OP•14mo ago

ctrl + shift + 3 puts it back to normal

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

no that's what I was asking you. lol

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

yes it does lol ty

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

ok cool. sorry on phone with therapist when creating a new table, I want to have a value that holds a boolean.

string sql2 = @"CREATE TABLE IF NOT EXISTS
                [goals] (
                [Id] INTEGER PRIMARY KEY NOT NULL AUTOINCREMENT,
                [Name] VARCHAR(75) NULL,
                [DateStarted] VARCHAR(75) NULL,
                [DateEnded] VARCHAR(75) NULL<
                [TimePerDay] INTEGER,
                [Achieved] // boolean here";

string sql2 = @"CREATE TABLE IF NOT EXISTS
                [goals] (
                [Id] INTEGER PRIMARY KEY NOT NULL AUTOINCREMENT,
                [Name] VARCHAR(75) NULL,
                [DateStarted] VARCHAR(75) NULL,
                [DateEnded] VARCHAR(75) NULL<
                [TimePerDay] INTEGER,
                [Achieved] // boolean here";

how would I do that using sqlite?

Pobiega•14mo ago

Tinyint Sqlite doesn't have bools, it uses 0 and 1

Mekasu0124OP•14mo ago

I went with a varchar(5) for a yes/no value DateTIme question. When formatting the date time like so

Console.WriteLine($"Current Date: {DateTime.Now.ToString("MM/dd/yyyy - hh:MM")}");

Console.WriteLine($"Current Date: {DateTime.Now.ToString("MM/dd/yyyy - hh:MM")}");

it gives me 04:10pm for my current time, but that's off by 45 minutes. It's currently 4:55pm my time so how do I fix the format so that it always shows my current date time? and also, no matter how many times I run the program, it consistently gives me 4:10 pm every single time. The time isn't changing and that's strange fixed it thank you both for your help small question. Are these the same thing?

// Example 1
using SQLiteConnection conn = new SQLiteConnection(dbFile);
using SQLiteCommand cmd = new SQLiteCommand(conn);

// Example 2
using SQLiteConnection conn = new SQLiteConnection(dbFile);
using SQLiteCommand cmd = conn.CreateCommand();

// Example 1
using SQLiteConnection conn = new SQLiteConnection(dbFile);
using SQLiteCommand cmd = new SQLiteCommand(conn);

// Example 2
using SQLiteConnection conn = new SQLiteConnection(dbFile);
using SQLiteCommand cmd = conn.CreateCommand();

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

Ummmm lol I forgot already. System.Data.SQLite I believe

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

Oh ok so either way is correct as they’re both the same

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

Isn’t that already being done with the using statement? It discards after the call is done?

Unknown User•14mo ago

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MODiX•14mo ago

TeBeCo

in both case you'd have to handle the connection lifetime anyway

Quoted by

<@689473681302224947> from #✅ Adding A Project Reference (click here)

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Unknown User•14mo ago

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Mekasu0124OP•14mo ago

So how would I go about handling it?

Pobiega•14mo ago

use CreateCommand, its the safer option even if by a tiny margin

Mekasu0124OP•14mo ago

So go with example 2?

Pobiega•14mo ago

yes

Mekasu0124OP•14mo ago

Ok. I’ll give it a shot. Thank you 🥰 so I'm using Stopwatch. I want to get the start time and the end time. I know I can use Elapsed to get the total time, but I want to be able to display the watch's start and end time. I've looked across google, but can't find anything with an example or explanation of how to do so, so how do I do it? Visual Studio won't let me do var start = watch.Start() nvm found a work around

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

public static void NewSessionStopWatch()
{
    string date = Helpers.GetDate(false);
    string today = Helpers.GetDate(true);

    Stopwatch watch = new();

    Console.Clear();
    Console.WriteLine("-----------------------");
    Console.WriteLine("Recording A New Session");
    Console.WriteLine("-----------------------");

    watch.Start();
    // get start time here
    Console.WriteLine($"\nTimer Started On: {date}");
    Console.WriteLine("\nPress SPACEBAR To Stop Timer At Any Time");

    do
    {
        if (Console.ReadKey().Key == ConsoleKey.Spacebar)
        {
            watch.Stop();
            // get end time here
            Console.WriteLine($"\nTimer Stopped On: {date}");

            CodeSession newSession = new()
            {
                TodaysDate = today,
                StartTime = // start time here => HH:MM:SS,
                EndTime = // end time here => HH:MM:SS,
                Duration = watch.Elapsed; // formated to HH:MM:SS
            }
        }
        else if (Console.ReadKey().Key != ConsoleKey.Spacebar)
        {
            Console.WriteLine("\nOnly The Spacebar Will Stop The Session");
        }
    }
    while (!(Console.KeyAvailable));
}

public static void NewSessionStopWatch()
{
    string date = Helpers.GetDate(false);
    string today = Helpers.GetDate(true);

    Stopwatch watch = new();

    Console.Clear();
    Console.WriteLine("-----------------------");
    Console.WriteLine("Recording A New Session");
    Console.WriteLine("-----------------------");

    watch.Start();
    // get start time here
    Console.WriteLine($"\nTimer Started On: {date}");
    Console.WriteLine("\nPress SPACEBAR To Stop Timer At Any Time");

    do
    {
        if (Console.ReadKey().Key == ConsoleKey.Spacebar)
        {
            watch.Stop();
            // get end time here
            Console.WriteLine($"\nTimer Stopped On: {date}");

            CodeSession newSession = new()
            {
                TodaysDate = today,
                StartTime = // start time here => HH:MM:SS,
                EndTime = // end time here => HH:MM:SS,
                Duration = watch.Elapsed; // formated to HH:MM:SS
            }
        }
        else if (Console.ReadKey().Key != ConsoleKey.Spacebar)
        {
            Console.WriteLine("\nOnly The Spacebar Will Stop The Session");
        }
    }
    while (!(Console.KeyAvailable));
}

the reason I'm wanting to get the start and end time is for the new session after the timer has stopped. I'm trying to write a helper function that can get me the time formatted to hh:mm:ss and return it as a string as the CodeSession class has the variables set to strings except for the Id. I'm just struggling to write the helper function.

Pobiega•14mo ago

DateTime and friends have very nifty methods available on them. Such as Add

Mekasu0124OP•14mo ago

tbh I don't need to use the stop watch itself. I can just use time stamps as I already have a function to calculate the difference between start and end, I just figured stopwatch would be more appropriate in this instance

arion•14mo ago

I didn't get to read everything, since i see a ton's been said in the thread already, lmk if its already been addressed or not. But user submitted strings + touching the database is usually not a good idea without some sort of validation.

cmd.Parameters.Add(new SQLiteParameter("@CurrentName", habit.Name));

Pobiega•14mo ago

It's parameterized, no SQL injection possible

arion•14mo ago

ah gotcha nod

only really touched Dapper and EF Core

Mekasu0124OP•14mo ago

I have validations that happen for everything in the code. It's part of the challenge is preventing the program from failing or stopping due to an error. ok let's say I Have this

DateTime now = DateTime.UtcNow;
TimeZoneInfo systemTimeZone = TimeZoneInfo.Local;
DateTime localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone);

DateTime now = DateTime.UtcNow;
TimeZoneInfo systemTimeZone = TimeZoneInfo.Local;
DateTime localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone);

which returns 10/4/2023 2:21:33 what would be the best way to format the return information into two variables, date and time, since ToString doesn't have an overload for formatting? I've been working with this in a playground, and although I know I can use .ToString("MM/dd/yyyy"); and .ToString(@"hh\:mm\:ss");, I do recall Pobiega saying that .ToString(); doesn't have an overload for formatting like that

MODiX•14mo ago

arion

REPL Result: Success

var now = DateTime.UtcNow; 
var systemTimeZone = TimeZoneInfo.Local; 
var localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone); 
localDateTime.ToString("hh:mm:ss")

var now = DateTime.UtcNow; 
var systemTimeZone = TimeZoneInfo.Local; 
var localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone); 
localDateTime.ToString("hh:mm:ss")

Result: string

07:30:32

07:30:32

Compile: 534.070ms | Execution: 35.404ms | React with ❌ to remove this embed.

arion•14mo ago

Adding an escape returns the same result (ToString(@"hh\:mm\:ss"))

Mekasu0124OP•14mo ago

so just use .ToString()

arion•14mo ago

Just .ToString() would return 4/10/23 7:30:06 PM

Pobiega•14mo ago

no that was for when you did string.Format("hh/mm") == input 😄

Mekasu0124OP•14mo ago

yea I went back and looked and saw that. that's my bad

Pobiega•14mo ago

it cant do that. but it can certainly format datetimes etc because each type owns its own implementation of ToString

MODiX•14mo ago

Mekasu0124

REPL Result: Success

using System.Globalization;

DateTime now = DateTime.UtcNow;
TimeZoneInfo systemTimeZone = TimeZoneInfo.Local;
DateTime localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone);

CultureInfo provider = CultureInfo.InvariantCulture;
DateTimeStyles style = DateTimeStyles.None;

string formatDate = "MM/dd/yyyy";
string date = localDateTime.ToString(formatDate);

string formatTime = @"hh\:mm\:ss";
string time = localDateTime.ToString(formatTime);

Console.WriteLine("Current UTC Date: {0}", now);
Console.WriteLine("Current System Time Zone: {0}", systemTimeZone);
Console.WriteLine("Converted Local Date Time: {0}", localDateTime);
Console.WriteLine("Date Format: {0}", formatDate);
Console.WriteLine("Formatted Date: {0}", date);
Console.WriteLine("Time Format: {0}", formatTime);
Console.WriteLine("Formatted Time: {0}", time);

using System.Globalization;

DateTime now = DateTime.UtcNow;
TimeZoneInfo systemTimeZone = TimeZoneInfo.Local;
DateTime localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone);

CultureInfo provider = CultureInfo.InvariantCulture;
DateTimeStyles style = DateTimeStyles.None;

string formatDate = "MM/dd/yyyy";
string date = localDateTime.ToString(formatDate);

string formatTime = @"hh\:mm\:ss";
string time = localDateTime.ToString(formatTime);

Console.WriteLine("Current UTC Date: {0}", now);
Console.WriteLine("Current System Time Zone: {0}", systemTimeZone);
Console.WriteLine("Converted Local Date Time: {0}", localDateTime);
Console.WriteLine("Date Format: {0}", formatDate);
Console.WriteLine("Formatted Date: {0}", date);
Console.WriteLine("Time Format: {0}", formatTime);
Console.WriteLine("Formatted Time: {0}", time);

Console Output

Current UTC Date: 10/04/2023 19:36:00
Current System Time Zone: (UTC) Coordinated Universal Time
Converted Local Date Time: 10/04/2023 19:36:00
Date Format: MM/dd/yyyy
Formatted Date: 10/04/2023
Time Format: hh\:mm\:ss
Formatted Time: 07:36:00

Current UTC Date: 10/04/2023 19:36:00
Current System Time Zone: (UTC) Coordinated Universal Time
Converted Local Date Time: 10/04/2023 19:36:00
Date Format: MM/dd/yyyy
Formatted Date: 10/04/2023
Time Format: hh\:mm\:ss
Formatted Time: 07:36:00

Compile: 526.881ms | Execution: 35.952ms | React with ❌ to remove this embed.

Mekasu0124OP•14mo ago

so this is what I've got is this the best/efficient practice?

arion•14mo ago

DateTime now = DateTime.UtcNow;
TimeZoneInfo systemTimeZone = TimeZoneInfo.Local;
DateTime localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone);

DateTime now = DateTime.UtcNow;
TimeZoneInfo systemTimeZone = TimeZoneInfo.Local;
DateTime localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone);

regarding this

DateTime.Now

DateTime.Now

exists

Unknown User•14mo ago

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MODiX•14mo ago

TeBeCo

REPL Result: Success

DateTimeOffset.Now.ToString("u")

DateTimeOffset.Now.ToString("u")

Result: string

2023-10-04 19:39:56Z

2023-10-04 19:39:56Z

Compile: 469.202ms | Execution: 39.524ms | React with ❌ to remove this embed.

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

why is it so important that I don't use DateTime but use DateTimeOffset instead?

Unknown User•14mo ago

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MODiX•14mo ago

please please please get into the habit of using DateTimeOffset instead of DateTime in your code everywhere you possibly can. DateTimeOffset contains the UTC offset with the data so is lossless. DateTime is very very weird in how it stores data. DateTime only knows UTC and "local" time. But your local time zone can change! Laptops easily move across state lines, even while an app is currently running. (So you are in California running an app, put some DateTime instance in memory, hop on a plane to New York, then resume your app 3 time zones ahead. What on earth will be contained within the DateTime instance?) But wait, this was a lie. DateTime actually has 3 ways it keeps track of time: UTC, local (which can change while an app is running), and unspecified (unknown, essentially). (Unknown = I don't know if it's UTC or local, the app will figure it out later and call ToUniversal or ToLocal before calling ToString or any comparison routine.) But wait, this was a lie. DateTime actually has a secret fourth way of storing data that's not exposed in the standard API surface! It's truly an abomination of a type. All of this nonsense is irrelevant if we just pretend DateTime doesn't exist and we instead use DateTimeOffset everywhere.

- GrabYourPitchforks (start: https://discord.com/channels/143867839282020352/143867839282020352/988353756108312607)

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

so then I'm assuming that I need to use TimeSpanOffset instead of TimeSpan

Unknown User•14mo ago

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Pobiega•14mo ago

10 hours is 10 hours 🙂

Unknown User•14mo ago

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Pobiega•14mo ago

but "the first of april 2017" is different for you and me

Unknown User•14mo ago

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Mekasu0124OP•14mo ago

didn't get a chance to read it, but what parts I did read didn't make sense to me as it's code I've never used

arion•14mo ago

I flew across the world from west coast to east coast, no time passed when

Unknown User•14mo ago

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Pobiega•14mo ago

You don't truly need to fully understand why, just know that DateTimeOffset is the modern, non-problematic version of DateTime we prefer one over the other

Mekasu0124OP•14mo ago

public static string GetDate(bool formatted)
{
    if (formatted)
    {
        DateTimeOffset now = DateTimeOffset.UtcNow;
        TimeZoneInfo systemTimeZone = TimeZoneInfo.Local;
        DateTimeOffset localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone);

        return localDateTime.ToString("MM/dd/yyyy");
    }
    else
    {
        DateTimeOffset now = DateTimeOffset.UtcNow;
        TimeZoneInfo timeZone = TimeZoneInfo.Local;
        DateTimeOffset localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, timeZone);
        return localDateTime.ToString();
    }
}

public static string GetDate(bool formatted)
{
    if (formatted)
    {
        DateTimeOffset now = DateTimeOffset.UtcNow;
        TimeZoneInfo systemTimeZone = TimeZoneInfo.Local;
        DateTimeOffset localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, systemTimeZone);

        return localDateTime.ToString("MM/dd/yyyy");
    }
    else
    {
        DateTimeOffset now = DateTimeOffset.UtcNow;
        TimeZoneInfo timeZone = TimeZoneInfo.Local;
        DateTimeOffset localDateTime = TimeZoneInfo.ConvertTimeFromUtc(now, timeZone);
        return localDateTime.ToString();
    }
}

well now I'm just more confused than ever, but it's whatever honestly. Switching to DateTimeOffset has caused this function to error on both conversions. I have no idea how to fix it. Cannot convert from DateTImeOffset to DateTime so there's that. besides that, I just need a helper function to return the current time so that I can finish the other function that I've been working on

Pobiega•14mo ago

thats because you were compensating for how garbage DateTIme is before and with DateTimeOffset, you don't need to you JUST need return DateTimeOffset.Now.ToString("MM/dd/yyyy");

Mekasu0124OP•14mo ago

thanks. that also helped with my helper function for getting the time.

Unknown User•14mo ago

Message Not Public

Mekasu0124OP•14mo ago

yes I'm aware. That's why I said thanks

Unknown User•14mo ago

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MODiX•14mo ago

TeBeCo

REPL Result: Failure

DateTimeOffset.Now.ToString(null);

DateTimeOffset.Now.ToString(null);

Exception: CompilationErrorException

- The call is ambiguous between the following methods or properties: 'DateTimeOffset.ToString(string?)' and 'DateTimeOffset.ToString(IFormatProvider?)'

- The call is ambiguous between the following methods or properties: 'DateTimeOffset.ToString(string?)' and 'DateTimeOffset.ToString(IFormatProvider?)'

Compile: 468.118ms | Execution: 0.000ms | React with ❌ to remove this embed.

MODiX•14mo ago

TeBeCo

REPL Result: Success

DateTimeOffset.Now.ToString("")

DateTimeOffset.Now.ToString("")

Result: string

10/04/2023 20:03:20 +00:00

10/04/2023 20:03:20 +00:00

Compile: 447.940ms | Execution: 29.337ms | React with ❌ to remove this embed.

Unknown User•14mo ago

Message Not Public

Mekasu0124OP•14mo ago

Unknown User•14mo ago

Message Not Public

Mekasu0124OP•14mo ago

I don't know. I don't like, or use, ternary operators

Pobiega•14mo ago

lol That is such a mekasu statement.

Mekasu0124OP•14mo ago

what's wrong with me not liking ternary operators 😐

Pobiega•14mo ago

its a bit like saying "I don't like hammers. So I use screwdrivers instead" an if statement is a statement. a ternary is an expression so they are actually different, and you cant use statements everywhere like in Expression<Func<T>> chains what I mean is that its perfectly fine to "not like" them for now, but eventually you'll need to get over that and learn to use them where they make sense.

Mekasu0124OP•14mo ago

To clarify, I know how to use them. I responded like I did, not because of the person or trying to help, but because I just don't like them and don't want to use them. I've had to use them periodically in my Python code as well, and I just dislike them because I like to keep my code sections separate for easier debugging and working with on my end. Ternary lines just annoy me because all of my code blocks are in a single line and although I understand that they're better in certain use cases, it annoys me when it comes to debugging. It's hard for me to explain honestly, but I get your point

Pobiega•14mo ago

I write mine like

  isTrue
  ? one
  : two;

  isTrue
  ? one
  : two;

makes it nice and easy to read 🙂

Mekasu0124OP•14mo ago

i changed it

Unknown User•14mo ago

Message Not Public

Mekasu0124OP•14mo ago

I can see how that helps to keep the conditions separate as well instead of an if statement but I am curious about something

bool conditionCheck = CheckSomeCondition();
if (condition == true)
{
    Console.WriteLine("Condition True");
    Console.WriteLine("Some other yielded results");
}
else
{
    Console.WriteLine("[Error] Condition False");
    MainMenu.ShowMenu();
}

bool conditionCheck = CheckSomeCondition();
if (condition == true)
{
    Console.WriteLine("Condition True");
    Console.WriteLine("Some other yielded results");
}
else
{
    Console.WriteLine("[Error] Condition False");
    MainMenu.ShowMenu();
}

when you have an if/else statement where both code blocks have multiple items in them, would it be more efficient to leave them as they are, or can they be turned ternary? I've tried to one-line something like this the other day when we were talking about this, but couldn't figure it out. I imagined it was something like

conditionCheck ? Console.WriteLine("Condition True"); Console.WriteLine("Some other yielded results"); : Console.WriteLine("[Error] Condition False"); MainMenu.ShowMenu();

conditionCheck ? Console.WriteLine("Condition True"); Console.WriteLine("Some other yielded results"); : Console.WriteLine("[Error] Condition False"); MainMenu.ShowMenu();

but I couldn't get it to work eith if/else statements that have code blocks with at least 2 lines of code in each and return a value. I've only been able to get them to work like

return conditionCheck ? Console.WriteLine("Condition True"); : MainMenu.ShowMenu();

return conditionCheck ? Console.WriteLine("Condition True"); : MainMenu.ShowMenu();

Pobiega•14mo ago

ternaries are expressions, so you can only have one thing in each branch, and that thing must be something that returns something they are not a replacement for if-statements so this code would be written as is, except perhaps inlining the condition and without the recursion :p

Mekasu0124OP•14mo ago

what recursion? I didn't do that in the example I don't think? and ok I got you. makes sense

Pobiega•14mo ago

MainMenu.ShowMenu(); smells like recursion to me, but it was just a guess :p

Mekasu0124OP•14mo ago

It's calling the main menu when the current process is done.

Pobiega•14mo ago

but only on failure thou, in that case which is why I assumed recursion as your "reset" and thats an anti pattern, you should just use a loop instead. recursion builds up the call stack

Mekasu0124OP•14mo ago

ok I'll look at it later. I have to go take a midterm. I'll be back

Pobiega•14mo ago

good luck

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