ArcGIS for Silverlight在地图上随机显示图片

最新推荐文章于 2021-05-29 05:55:40 发布

原创最新推荐文章于 2021-05-29 05:55:40 发布 · 1.1k 阅读

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CC 4.0 BY-SA版权

文章标签：

#silverlight #random #timer #object #class

本文介绍如何使用ArcGIS的Silverlight接口实现地图上的随机图片显示。通过继承ObservableCollection并利用定时器不断更新地图上的标记位置，演示了一种动态展示效果。程序实现了随机地理位置的图片放置，并展示了具体代码实现。

研究了下ArcGIS的Silverlight接口可以继承ObservableCollection实现特殊效果。下面的程序就是随机的在地图上显示图片

using System;
using System.Collections.ObjectModel;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Windows.Threading;
using ESRI.ArcGIS.Client;
using ESRI.ArcGIS.Client.Geometry;
using ESRI.ArcGIS.Client.Symbols;

namespace ArcGISEditorTest
{
    public class Customers : ObservableCollection<Graphic>
    {
        Random random;

        private static ESRI.ArcGIS.Client.Projection.WebMercator mercator =
            new ESRI.ArcGIS.Client.Projection.WebMercator();
        public Customers()
        {
            Load();
        }
        private void Load()
        {
            random = new Random();
            PictureMarkerSymbol pictureMarkerSymbol = new PictureMarkerSymbol();
            pictureMarkerSymbol.Source = new BitmapImage(new Uri("1.png", UriKind.Relative));

            for (int i = 0; i < 3; i++)
            {
                Graphic g = new Graphic()
                {
                    Geometry = mercator.FromGeographic(new MapPoint(random.Next(-180, 180), random.Next(-90, 90)))
                };

                g.Symbol = pictureMarkerSymbol;
                Add(g);
            }
        }

        void timer_Tick(object sender, EventArgs e)
        {
            ClearItems();

            random = new Random();
            PictureMarkerSymbol pictureMarkerSymbol = new PictureMarkerSymbol();
            pictureMarkerSymbol.Source = new BitmapImage(new Uri("1.png",UriKind.Relative));

            for (int i = 0; i < 10; i++)
            {
                Graphic g = new Graphic()
                {
                    Geometry = mercator.FromGeographic(new MapPoint(random.Next(-180, 180), random.Next(-90, 90)))
                };

                g.Symbol = pictureMarkerSymbol;
                Add(g);
            }
        }


    }
}