C# ScrollIntoView不'；我不能用触觉工作

因此，我有一张地图，上面有许多图钉，右边有一个列表，列出了所有图钉（使用相同的视图模型）

当我点击地图上的一个图钉时，我想将该项目滚动到列表中的视图中

我目前在点击和点击时使用此代码：

private void ScrollPushPin(Pushpin pushpin)
{
      ScrollViewer scrollViewer = GetScrollViewer(MyList) as ScrollViewer;
      scrollViewer.ScrollToBottom();
      var index = this.MyList.Items.IndexOf(pushpin);

      //index is never -1 so I would expect it to work?
      this.MyList.ScrollIntoView(pushpin); 
}

点击：

void pp_MouseDown(object sender, MouseButtonEventArgs e)
{
    ScrollPushPin(sender as PushPin);
}

void pp_TouchDown(object sender, TouchEventArgs e)
{
    var pushpin = (Pushpin)sender;
    pushpin.CaptureTouch(e.TouchDevice);
}

void pp_TouchUp(object sender, TouchEventArgs e)
{
   var pushpin = (Pushpin)sender;
    if (pushpin != null && e.TouchDevice.Captured == pushpin)
    {
        pushpin.ReleaseTouchCapture(e.TouchDevice);
        ScrollPushPin(pushpin);
    }
}

触摸屏：

void pp_MouseDown(object sender, MouseButtonEventArgs e)
{
    ScrollPushPin(sender as PushPin);
}

void pp_TouchDown(object sender, TouchEventArgs e)
{
    var pushpin = (Pushpin)sender;
    pushpin.CaptureTouch(e.TouchDevice);
}

void pp_TouchUp(object sender, TouchEventArgs e)
{
   var pushpin = (Pushpin)sender;
    if (pushpin != null && e.TouchDevice.Captured == pushpin)
    {
        pushpin.ReleaseTouchCapture(e.TouchDevice);
        ScrollPushPin(pushpin);
    }
}

当我用鼠标点击我的图钉时，这段代码运行良好，但触摸事件不会将图钉滚动到视图中，我不明白为什么

我也尝试过：

void pp_MouseDown(object sender, MouseButtonEventArgs e)
{
    ScrollPushPin(sender as PushPin);
}

void pp_TouchDown(object sender, TouchEventArgs e)
{
    var pushpin = (Pushpin)sender;
    pushpin.CaptureTouch(e.TouchDevice);
}

void pp_TouchUp(object sender, TouchEventArgs e)
{
   var pushpin = (Pushpin)sender;
    if (pushpin != null && e.TouchDevice.Captured == pushpin)
    {
        pushpin.ReleaseTouchCapture(e.TouchDevice);
        ScrollPushPin(pushpin);
    }
}

及

---

所以不要问我为什么这样做，但在我的事件末尾添加

e.Handled=true

解决了问题：

void pp_TouchDown(object sender, TouchEventArgs e)
{
    var pushpin = (Pushpin)sender;
    pushpin.CaptureTouch(e.TouchDevice);
    e.Handled = true
}

void pp_TouchUp(object sender, TouchEventArgs e)
{
   var pushpin = (Pushpin)sender;
    if (pushpin != null && e.TouchDevice.Captured == pushpin)
    {
        pushpin.ReleaseTouchCapture(e.TouchDevice);
        ScrollPushPin(pushpin);
    }
    e.Handled = true
}

编辑

添加

e.Handled=true

会导致更多问题，因此我决定编写自己的

ScrollIntoView

var val = this.MyList.Items.IndexOf(myObj);
if (val != -1)
{
    ScrollViewer scrollViewer = GetScrollViewer(MyList) as ScrollViewer;
    var itemHeight = scrollViewer.ExtentHeight / this.MyList.Items.Count;
    scrollViewer.ScrollToVerticalOffset(itemHeight * val);
}

//where
public static DependencyObject GetScrollViewer(DependencyObject o)
{
    if (o is ScrollViewer)
    { return o; }

    for (int i = 0; i < VisualTreeHelper.GetChildrenCount(o); i++)
    {
        var child = VisualTreeHelper.GetChild(o, i);

        var result = GetScrollViewer(child);
        if (result == null)
        {
            continue;
        }
        else
        {
            return result;
        }
    }

    return null;
}

var val=this.MyList.Items.IndexOf（myObj）；
如果（val！=-1）
{
ScrollViewer ScrollViewer=GetScrollViewer（MyList）作为ScrollViewer；
var itemHeight=scrollViewer.ExtentHeight/this.MyList.Items.Count；
scrollViewer.ScrollToVerticalOffset（itemHeight*val）；
}
//在哪里
公共静态DependencyObject GetScrollViewer（DependencyObject o）
{
如果（o是ScrollViewer）
{返回o；}
for（int i=0；i