使用RadMap实现GIS效果中调用地图缓存，缓存都是PNG格式保存在文件夹中，以Y_X.png格式存放
需要继承抽象类 TiledMapSource 并重写GetTile方法
View Code
1 public class TiledMapSource : MultiScaleTileSource, IMapSource
2 {
3 public static readonly DependencyProperty OpacityProperty;
4
5 protected TiledMapSource(int minZoomLevel, int maxZoomLevel, int tileWidth, int tileHeight);
6
7 public CultureInfo Culture { get; set; }
8 protected int MaxZoomLevel { get; }
9 protected int MinZoomLevel { get; }
10 public double Opacity { get; set; }
11 public string UniqueId { get; protected set; }
12
13 public event EventHandler IntializeCompleted;
14
15 protected virtual int ConvertTileToZoomLevel(int tileLevelDetail);
16 protected virtual int ConvertZoomToTileLevel(int zoomLevel);
17 protected virtual Uri GetTile(int tileLevel, int tilePositionX, int tilePositionY);
18 protected override void GetTileLayers(int tileLevel, int tilePositionX, int tilePositionY, IList<object> tileImageLayerSources);
19 public virtual void Initialize();
20 protected void InvalidateNullTiles();
21 public virtual bool IsLevelSupported(int level);
22 protected virtual bool IsValidTileLevel(int tileLevel);
23 protected void RaiseIntializeCompleted();
24 }
重写方法：
调用地址：TileMapnikUrlFormat = @"http://localhost/map/{zoom}/{y}_{x}.png";
View Code
1 /// <summary>
2 /// Gets the image URI.
3 /// </summary>
4 /// <param name="tileLevel">Tile level.</param>
5 /// <param name="tilePositionX">Tile X.</param>
6 /// <param name="tilePositionY">Tile Y.</param>
7 /// <returns>URI of image.</returns>
8 protected override Uri GetTile(int tileLevel, int tilePositionX, int tilePositionY)
9 {
10 int zoomLevel = ConvertTileToZoomLevel(tileLevel);
11
12 string url = string.Empty;
13
14 url = TileMapnikUrlFormat;
15 url = ProtocolHelper.SetScheme(url);
16 url = url.Replace("{zoom}", (zoomLevel).ToString(CultureInfo.InvariantCulture));
17 url = url.Replace("{x}", (tilePositionX + 1).ToString(CultureInfo.InvariantCulture));
18 url = url.Replace("{y}", (tilePositionY + 1).ToString(CultureInfo.InvariantCulture));
19
20 return new Uri(url);
21 }
