Question

我正在动态创建一个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某些操作。这就是我尝试过的：

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

处理程序方法中有__（双下划线）。

void tagGroupBox_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
}

Answer 2

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>

动态分配事件

2 个答案: