Lounder Posts - Answer Overflow

Lounder

•Created by Lounder on 4/15/2024 in #help

ASP.NET Core - Database Model and ViewModel Validation

What is the point of writing Validation attributes outside of the EF Core Data Model (for example in the ViewModel), given that the checks are not only valid for the database, but are also triggered when a request is received?

18 replies

CC#

•Created by Lounder on 3/25/2024 in #help

Can someone experienced explain this diagram in detail? ASP.NET Core

3 replies

CC#

•Created by Lounder on 12/12/2023 in #help

✅ EF Core navigational properties

This works fine (no navigational property to Business):

class Business
- ...
- Address Address { get; set; }

class Address
- ...

class Business
- ...
- Address Address { get; set; }

class Address
- ...

This causes an error:

class Business
- ...
- Address Address { get; set; }

class Address
- ...
- Business { get; set; }

class Business
- ...
- Address Address { get; set; }

class Address
- ...
- Business { get; set; }

InvalidOperationException: The value of 'Address.Id' is unknown when attempting to save changes. This is because the property is also part of a foreign key for which the principal entity in the relationship is not known

InvalidOperationException: The value of 'Address.Id' is unknown when attempting to save changes. This is because the property is also part of a foreign key for which the principal entity in the relationship is not known

Initialization code:

            var address = new Address
            {
                Street = "SName",
                City = "CName",
            };

            await dbContext.Addresses.AddAsync(address);

            var address = new Address
            {
                Street = "SName",
                City = "CName",
            };

            await dbContext.Addresses.AddAsync(address);

How can I make this work while also keeping Address' nav property to Business? Please @ me so I respond immediately

48 replies

CC#

•Created by Lounder on 12/6/2023 in #help

✅ [EF Core] Why does my database entity have a one-directional FK Connection?

7 replies

CC#

•Created by Lounder on 12/19/2022 in #help

❔ I'm looking for a Visual Studio 2022 extension, which organizes my CSS

https://raw.githubusercontent.com/ucsw/css-organizer/master/images/CSS-Organizer.gif An extension such as this one https://marketplace.visualstudio.com/items?itemName=ucsoftware.css-organizer

3 replies

CC#

•Created by Lounder on 12/1/2022 in #help

❔ 'Can't find stylesheet to import.' using SASS with 'Web Compiler 2022+' extension in ASP.NET C MVC

2 replies

CC#

•Created by Lounder on 11/3/2022 in #help

Why can't an interface property have a private set? [Answered]

string WrittenMessageLog { get; private set; }

5 replies

CC#

•Created by Lounder on 10/23/2022 in #help

Simple Recursion [Answered]

How can I make a recursive method return false when one or more of the iterations have returned false but the top recursion has returned true?

-true
  -true
    -false // method should return false

-true
  -true
    -false // method should return false

Example with code:

        static void Main(string[] args)
        {
            /*
            8. Write a program in C# Sharp to check whether a given string is Palindrome or not using recursion. Go to the editor
            Test Data :
            Input a string : RADAR
            Expected Output :
            The string is Palindrome.
            */

            Console.WriteLine(ReverseLetters("RADAR"));
        }

        private static bool ReverseLetters(string word)
        {
            if (word.Length > 1 && word[0] == word[word.Length - 1])
            {
                ReverseLetters(word.Substring(1, word.Length - 2));
                return true;
            }

            return false;
        }

        static void Main(string[] args)
        {
            /*
            8. Write a program in C# Sharp to check whether a given string is Palindrome or not using recursion. Go to the editor
            Test Data :
            Input a string : RADAR
            Expected Output :
            The string is Palindrome.
            */

            Console.WriteLine(ReverseLetters("RADAR"));
        }

        private static bool ReverseLetters(string word)
        {
            if (word.Length > 1 && word[0] == word[word.Length - 1])
            {
                ReverseLetters(word.Substring(1, word.Length - 2));
                return true;
            }

            return false;
        }

5 replies

CC#

•Created by Lounder on 8/18/2022 in #help

Is it possible to publish a WPF Application into a single file with the font inside of the EXE?

6 replies

CC#

•Created by Lounder on 8/17/2022 in #help

Class making my program run as a background process after I close it [Answered]

https://paste.myst.rs/7o8qz5vk After I close my program through RMB>Close window it continues running in the background unless I close it through the task manager. I have found out that this class causes this

3 replies

CC#

•Created by Lounder on 8/16/2022 in #help

Is it possible to run code only when a hover event occurs in my application? [Answered]

3 replies

CC#

•Created by Lounder on 8/16/2022 in #help

WPF UIElement.IsHitVisible help needed

Hello, In WPF IsHitTestVisible="False" instead of only ignoring mouse clicks, it also ignores MouseEnter events. I want mouse clicks to pass through and OnMouseEnter events to be triggered

2 replies

CC#

•Created by Lounder on 8/15/2022 in #help

Help with Linq

25 replies

CC#

•Created by Lounder on 8/13/2022 in #help

Background Opacity in WinFroms

I'm trying to create a simple two-layered click-through program in Windows Forms which has a semi-transparent background and a non-transparent label

7 replies

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