如何在 wpf C# 中检查鼠标按钮是向左还是向右?

问题描述：

我正在尝试这段代码，实际上我只创建了一个位于 Click="button_Click" 上的 Eventhandler.

I'm trying this code actually I have created only one Eventhandler that is on Click="button_Click".

XAML:

<Window x:Class="WPFAPP.Window1" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:WPFAPP"
    mc:Ignorable="d"
    Title="Window1" Height="447.625" Width="562">

    <Grid>
        <Button x:Name="btn1" Content="Button1" Click="button_Click" HorizontalAlignment="Left" Margin="26,22,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="btn2" Content="Button2" Click="button_Click" HorizontalAlignment="Left" Margin="26,61,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="btn3" Content="Button3" Click="button_Click" HorizontalAlignment="Left" Margin="26,100,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="btn4" Content="Button4" Click="button_Click" HorizontalAlignment="Left" Margin="26,137,0,0" VerticalAlignment="Top" Width="75"/>
        <Button x:Name="btn5" Content="Button5" Click="button_Click" HorizontalAlignment="Left" Margin="26,174,0,0" VerticalAlignment="Top" Width="75"/>
    </Grid>
</Window>

C# 背后的代码:

private void button_Click(object sender, RoutedEventArgs e)
{
    Button button = (Button)sender;
    if(e.Equals(Mouse.RightButton))
    {
        button.ClearValue(Button.BackgroundProperty);
        button.Background = Brushes.Green;
    } 
}

答

Click 仅设计用于最有限的交互，如果您使用更高级的鼠标事件，您将获得一个 MouseButtonEventArgs，它为您提供有关该事件的所有详细信息.

Click is only designed for the most limited interaction, if you use the more advanced mouse events you then get a MouseButtonEventArgs which gives you all details about the event.

这样做的原因是 Click 不是鼠标事件，您也可以通过触摸、手写笔触发它，您甚至可以通过在突出显示时按 Return 键来触发它

the reason for this is that Click isn't a mouse event, you could also trigger it with a touch, stylus, you can even trigger it with the keyboard by pressing Return while highlighted

所以试试 MouseDown、MouseUp 或 DoubleClick

so try MouseDown, MouseUp or DoubleClick instead

例如

<Button MouseDoubleClick="Button_MouseDoubleClick" >Click me</Button>

private void Button_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
    if(e.ChangedButton == MouseButton.Right)
    {
    }
    e.Handled = true;
}

或鼠标按下

<Button MouseDown="Button_MouseDown" >Click me</Button>

private void Button_MouseDown(object sender, MouseButtonEventArgs e)
{
    if(e.ChangedButton == MouseButton.Right)
    {
    }
    e.Handled = true;
}

如何在 wpf C# 中检查鼠标按钮是向左还是向右?

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