在WPF MouseLeftButtonDown事件处理程序中按Ctrl键按下条件。

How I can add an additional condition for a certain keyboard key, to a WPF MouseLeftButtonDown event-handler?

如何向WPF MouseLeftButtonDown事件处理程序添加某个键盘键的附加条件?

For example Ctrl + key

例如Ctrl + key

private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{         
    ...
}

3 个解决方案

#1

private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) {
    if(Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl)) {
        MessageBox.Show("Control key is down");
    } else {
        MessageBox.Show("Control key is up");
    }
}

#2

If you want to detect modifiers only, you can also use:

如果你只想检测修饰词，你也可以使用:

if (Keyboard.Modifiers == ModifierKeys.Control) {}
if (Keyboard.Modifiers == ModifierKeys.Shift) {}

etc. More here.

等这里。

#3

In .NET 4.0 you could use:

在。net 4.0中，你可以使用:

Keyboard.Modifiers.HasFlag(ModifierKeys.Control)

#1

private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) {
    if(Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl)) {
        MessageBox.Show("Control key is down");
    } else {
        MessageBox.Show("Control key is up");
    }
}

#2