kuulie
✅ adding SQLite [Indexed] to a C# class property
Hi I'm trying to understand what it means to add an index to a column and how it speeds up querying. I asked ChatGPT about indexing but I still don't understand the process the SQLite does that makes querying faster.
When an index is created on a column in a table, it creates a separate data structure that stores the values of the indexed column in a sorted order. This data structure is known as a B-tree index.
ChatGPT:
"Let's say you have a table with a column named "age", and you create an index on that column. When you insert data into the table, the indexed column values will be stored in the B-tree index in sorted order.
Now, if you execute a query that filters records based on the "age" column, the database engine will consult the B-tree index to quickly locate the rows that match the filter criteria, instead of scanning the entire table.
For example, if you have a query that filters records where age is equal to 30, the database engine will search for the portion of the B-tree index that corresponds to the value 30. It will then use the pointers in that portion of the index to directly access the relevant rows in the table, rather than scanning the entire table sequentially."
5 replies
❔ Why is there a green squiggly line under the first Console.ReadLine(); ?
namespace CSharpPractice // had to check no top-level statements
{
internal class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello, World!");
string message = Console.ReadLine(); // <= green squiggly, CS8600
Console.WriteLine($"Echo: {message}");
Console.ReadLine(); // require user to press Enter to close program
}
}
}
68 replies
✅ Does this styling code look right?
I'm using this code for a simple hover effect. Im wondering if I'm doing this correctly:
<Window.Resources>
<Style TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border Background="{TemplateBinding Background}">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="Green"/>
</Trigger>
</Style.Triggers>
</Style>
</Window.Resources>
4 replies
✅ How to add hover effect to WPF button element
This code I'm using isn't working. When I hover over buttons its a lightblue color.
<Style TargetType="Button">
<Setter Property="FontSize" Value="18" />
<Setter Property="FontWeight" Value="Medium" />
<Setter Property="Foreground" Value="#262626" />
<Setter Property="Background" Value="#ECECEC" />
<Setter Property="BorderThickness" Value="0" />
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="#E0E0E0" />
</Trigger>
</Style.Triggers>
</Style>
7 replies
✅ How to select duplicates on VS
I'm new to Visual Studio and I'm trying to do something I can do on VSC. I highlighted something in an XAML file and I'm trying to select all other duplicates downward using Cmd + D just like in VSC but its not working. How can I multiselect the duplicates?
17 replies
❔ Publish the API app to Azure App Service
I'm trying to host my API App using Azure but what does the Microsoft tutorial mean by "Solution Explorer"? I'm on Visual Studio and also Azure right now.
Complete the following steps to publish the ASP.NET Core web API to Azure API Management:
In Solution Explorer, right-click the project and select Publish.
In the Publish dialog, select Azure and select the Next button.
4 replies