鼠标滑轮上滚下滚事件

鼠标滑轮上滚下滚事件

​​xaml​​​中定义了一​​Grid​​，其结构如下：

<Grid>
  <ScrollViewer VerticalScrollBarVisibility="Hidden" HorizontalScrollBarVisibility="Hidden">
    <Canvas Background="Red" Width="500" Height="500" HorizontalAlignment="Center" VerticalAlignment="Center"></Canvas>
  </ScrollViewer>
</Grid>

然后添加滑轮滚动事件​​ShowFuncGrid_MouseWheel​​：

<Grid Grid.Column="1">
  <ScrollViewer VerticalScrollBarVisibility="Hidden" HorizontalScrollBarVisibility="Hidden">
    <Canvas MouseWheel="ShowFuncGrid_MouseWheel" Background="Red" Width="500" Height="500" HorizontalAlignment="Center" VerticalAlignment="Center"></Canvas>
  </ScrollViewer>
</Grid>

之后在对应的​​cs​​文件中添加事件：

private void ShowFuncGrid_MouseWheel(object sender, MouseWheelEventArgs e)
{
  if(e.Delta>0)
  {
     MessageBox.Show("鼠标滑轮上滚");
  }
  else
  {     
    MessageBox.Show("鼠标滑轮下滚");
  }
}

这样就可以检测鼠标滑轮是上滑还是下滑。

注意：此事件添加到​​Grid​​上无效。