动态分配事件

Question

我正在动态地创建一个GroupBox，并尝试将MouseLeftButtonDown事件分配给它，以便在用户左键单击它时执行一些操作。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");
}

Answer 1

handler方法中有__(双下划线)

void tagGroupBox_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
}

Answer 2

这个适合我:

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>