动态分配事件

发布于 2024-12-08 02:38:21 字数 465 浏览 0 评论 0原文

我正在动态创建一个 GroupBox 并尝试将 MouseLeftButtonDown 事件分配给它，以在用户左键单击它时执行某些操作。这是我尝试过的：

public MyClass()
{
    tagGroupBox.MouseLeftButtonDown += new MouseButtonEventHandler(tagGroupBox_MouseLeftButtonDown);  //generates error: "tagGroupBox_MouseLeftButtonDown does not exist in the current context"
}

private void tagGroupBox__MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
     MessageBox.Show("Left click event triggered");
}

原文

I am dynamically creating a GroupBox and trying to assign the MouseLeftButtonDown event to it to perform some action when the user left-clicks on it. This is what I've tried:

public MyClass()
{
    tagGroupBox.MouseLeftButtonDown += new MouseButtonEventHandler(tagGroupBox_MouseLeftButtonDown);  //generates error: "tagGroupBox_MouseLeftButtonDown does not exist in the current context"
}

private void tagGroupBox__MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
     MessageBox.Show("Left click event triggered");
}

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娇俏 2024-12-15 02:38:21

handler 方法中有 __（双下划线）。

void tagGroupBox_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
}

There are __ (double underscores) in handler method.

void tagGroupBox_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
}

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似狗非友 2024-12-15 02:38:21

这对我有用：

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        GroupBox g = new GroupBox();
        g.MouseLeftButtonUp += new MouseButtonEventHandler(g_MouseLeftButtonUp);
        MainGrid.Children.Add(g);
    }

    void g_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
    {
        System.Diagnostics.Debugger.Break();
    }
}

XAML

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
    <Grid x:Name="MainGrid">

    </Grid>
</Window>

This works for me:

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        GroupBox g = new GroupBox();
        g.MouseLeftButtonUp += new MouseButtonEventHandler(g_MouseLeftButtonUp);
        MainGrid.Children.Add(g);
    }

    void g_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
    {
        System.Diagnostics.Debugger.Break();
    }
}

XAML

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
    <Grid x:Name="MainGrid">

    </Grid>
</Window>

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