Question

我有一个场景，我希望用户在wp7应用中查看Bing地图中的多个图钉。我使用maplayer来制作图钉集群，但我无法在cs文件本身动态地向该图钉添加图像。顺便说一句，我没有在xaml中使用图钉控件。我只是在循环时将图钉对象添加到maplayer。

这是我的代码：

maplayer layer = new maplayer();

watcher.start();

for (int i = 0; i < lst.count; i++)

           {                  
                    Pushpin mypin = new Pushpin();
                    watcher.Position.Location.Latitude = Convert.ToDouble(lst[i].Latitude);
                    watcher.Position.Location.Longitude=Convert.ToDouble(lst[i].Longitude);

                }


                GeoCoordinate geo = new GeoCoordinate(watcher.Position.Location.Latitude, watcher.Position.Location.Longitude);
                mypin.Location = geo;

                mypin.Background = new SolidColorBrush(Colors.Gray);
                mypin.Foreground = new SolidColorBrush(Colors.White);
                mypin.Content = "My location";
                layer.AddChild(mypin, mypin.Location);
            }
            map1.SetView(watcher.Position.Location, Status == true ? 5.0 : 3.0);
            map1.Children.Add(layer);


watcher.stop();

我也尝试使用图像画笔属性为图钉提供图像源，但图钉本身不可见。

像这样：

ImageBrush ib = new ImageBrush();

ib.ImageSource = new System.Windows.Media.Imaging.BitmapImage(new Uri(@"Images/push.png", UriKind.Relative));

mypin.Background = ib;

请帮我解决这个问题。我需要这样做，而无需更改/添加datatemplate到xaml端的pushpin。

Answer 1

Working With Pushpins页面上的MSDN中介绍了此问题。以下是给出的示例，其中图像直接添加到地图上的图层中：

namespace WindowsPhoneApplication1
{
    public partial class MainPage : PhoneApplicationPage
    {
        MapLayer imageLayer;


        public MainPage()
        {
            InitializeComponent();

            //Create a layer to contain the pushpin images.
            imageLayer = new MapLayer();
            map1.Children.Add(imageLayer);
        }


        private GeoCoordinate mapCenter;

        private void button1_Click(object sender, RoutedEventArgs e)
        {

            // Retrieve the center of the current map view.
            mapCenter = map1.Center;

            // Define the image to use as the pushpin icon.
            Image pinImage = new Image();

            //Define the URI location of the image.
            pinImage.Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("bluepushpin.png", UriKind.Relative));

            //Define the image display properties.
            pinImage.Opacity = 0.8;
            pinImage.Stretch = System.Windows.Media.Stretch.None;

            // Put the image at the center of the view.
            PositionOrigin position = PositionOrigin.Center;
            imageLayer.AddChild(pinImage, mapCenter, position);

        }
    }
}

如何在c＃中动态地为图钉提供图像

1 个答案: