Question

我正在使用C＃创建一个Windows应用商店应用，并需要一些方法来帮助解决地图上的图钉被点击的方法。到目前为止，我创建了一个名为currentPin的Pushpin，它是我在XAML代码中创建的。我还在这里为Tapped事件做了一个名为pushpin_Tapped的参考。

<Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
        <bm:Map x:Name="MyMap" Credentials="{StaticResource BingMapsApiKey}" Holding="map_Held">

            <bm:Map.Children>
                <bm:Pushpin x:Name="pin" Tapped="pushpinTapped">

                </bm:Pushpin>
            </bm:Map.Children>
        </bm:Map>
    </Grid>

然后我将currentPin放在MainPage.xaml.cs代码中的OnNavigatedTo方法的当前位置。我还创建了这个图钉被点击的方法。在这个方法中，我显示了一个用于点击currentPin的对话框。

private async void pushpinTapped(object sender, Windows.UI.Xaml.Input.TappedRoutedEventArgs e)
            {

                var x = MapLayer.GetPosition(pin);
                MessageDialog dialog = new MessageDialog("You are here " + x.Latitude + " " + x.Longitude);
                await dialog.ShowAsync();
            }

然后我有一个方法，当用户持有地图时，在地点上放置一个新图钉，代码如下：

private void map_Held(object sender, HoldingRoutedEventArgs e)        
{            
    Debug.WriteLine("You held at" + DateTime.Now.ToString() + "" + e.GetPosition(MyMap));            
    var pos = e.GetPosition(MyMap);            
    Location location;            
    MyMap.TryPixelToLocation(pos, out location);                          
    Pushpin pin = new Pushpin();            
    MyMap.Children.Add(pin);                        
    MapLayer.SetPosition(pin, location);                       
}

我知道它可能正在盯着我，但是我正在消息如何获取一个消息框或对话框，或者在点击这些新引脚时发生任何事情。有人可以解决一些问题吗？谢谢，艾米

Answer 1

private void map_Held(object sender, HoldingRoutedEventArgs e)        
{            
    Debug.WriteLine("You held at" + DateTime.Now.ToString() + "" + e.GetPosition(MyMap));            
    var pos = e.GetPosition(MyMap);            
    Location location;            
    MyMap.TryPixelToLocation(pos, out location);                          
    Pushpin pin = new Pushpin();
    pin.Tapped += pushpinTapped;  // <<<<<<=====LOOK AT THIS
    MyMap.Children.Add(pin);                        
    MapLayer.SetPosition(pin, location);                       
}

Answer 2

在Map_Held中，添加已点击事件的处理程序...

private void map_Held(object sender, HoldingRoutedEventArgs e)        
{            
    Debug.WriteLine("You held at" + DateTime.Now.ToString() + "" + e.GetPosition(MyMap));            
    var pos = e.GetPosition(MyMap);            
    Location location;            
    MyMap.TryPixelToLocation(pos, out location);                          
    Pushpin newpin = new Pushpin();            
    newpin.Tapped += pushpin_Tapped;
    MyMap.Children.Add(newpin);                        
    MapLayer.SetPosition(newpin, location);                       
}

并在您的tapped事件处理程序中，将引脚的引用从pin更改为以下内容。

private async void pushpinTapped(object sender, Windows.UI.Xaml.Input.TappedRoutedEventArgs e)
{
    PushPin tappedpin = sender as PushPin;  // gets the pin that was tapped
    if(null == tappedpin) return;           // null check to prevent bad stuff if it wasn't a pin.
    var x = MapLayer.GetPosition(tappedpin);
    MessageDialog dialog = new MessageDialog("You are here " + x.Latitude + " " + x.Longitude);
    await dialog.ShowAsync();
}

如何使用Bing地图在windows store app中实现多个新图钉的方法

2 个答案: