转 ArcGIS Runtime 加载SHAPE数据的另一种方式-动态图层 .

ArcGIS 10.1中有一个新的功能就是动态图层（NOT DynamicLayer，动态地图服务），该动态图层简单的说，就是向一个动态服务注册一个工作空间，该工作空间中含有shape，栅格等数据，这样的话，客户端可以通过API获取这个工作空间下的所有shape数据，并可以对其进行渲染。ArcGIS Runtime和ArcGIS Server的架构类似，而API也十分相像，ArcGIS Runtime加载shape数据除了我们前面介绍的方法，还可以通过动态图层这样的方式，原理和ArcGIS Server的一样，现在说下步骤：

         加载MPK(相当于ArcGIS Server的动态地图）；

         注册一个包含shape数据的工作空间，也就是一个目录；

          遍历该目录，获取shape数据，然后加载。

核心代码：

01.OpenFileDialog openFileDialog = new OpenFileDialog();  
02.           openFileDialog.Filter = "Image files (*.bmp,*.png,*.sid,*.tif)|*.bmp;*.png;*.sid;*.tif;";   
03.           openFileDialog.RestoreDirectory = true;  
04.           openFileDialog.Multiselect = true;  
05.           if (openFileDialog.ShowDialog() == true)  
06.           {  
07.               try  
08.               {  
09.                   // // 添加栅格   
10.                   AddFileDatasetToDynamicMapServiceLayer(WorkspaceFactoryType.Raster,  
11.                      Path.GetDirectoryName(openFileDialog.FileName),  
12.                      new List<string>(openFileDialog.SafeFileNames),  
13.                      arcGisLocalDynamicMapServiceLayer =>  
14.                      {  
15.                          
16.                          _map.Layers.Add(arcGisLocalDynamicMapServiceLayer);  
17.                      });  
18.               }  
19.               catch (Exception ex)  
20.               {  
21.                   MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);  
22.               }  
23.           } 

01.public void AddFileDatasetToDynamicMapServiceLayer(WorkspaceFactoryType workspaceType, string directoryPath, List<string> fileNames, Action callback)  
02.      {  
03.          try  
04.          {  
05.              // 产生UID   
06.              string uniqueId = Guid.NewGuid().ToString();  
07.  
08.              // 工作空间信息   
09.              WorkspaceInfo workspaceInfo = new WorkspaceInfo(uniqueId, workspaceType, "DATABASE=" + directoryPath);  
10.  
11.              // 本地服务，该方法是NET3新特性   
12.              LocalMapService localMapService = new LocalMapService  
13.              {  
14.                   
15.                  Path = _emptyMpkPath,  
16.  
17.                  //这个属性很关键   
18.                  EnableDynamicLayers = true  
19.              };  
20.  
21.              // 给动态地图服务注册工作空间   
22.              localMapService.DynamicWorkspaces.Add(workspaceInfo);  
23.  
24.              // 异步方法在ArcGIS Runtime中处处可见   
25.              localMapService.StartAsync(x =>  
26.              {  
27.                    
28.                  ArcGISLocalDynamicMapServiceLayer arcGisLocalDynamicMapServiceLayer = null;  
29.  
30.                    
31.                  arcGisLocalDynamicMapServiceLayer = new ArcGISLocalDynamicMapServiceLayer(localMapService)  
32.                  {  
33.                      // 工作空间ID   
34.                      ID = "Workspace: " + (new DirectoryInfo(directoryPath)).Name,  
35.                        
36.                      //动态图层   
37.                      EnableDynamicLayers = true,  
38.                  };  
39.  
40.                    
41.                  arcGisLocalDynamicMapServiceLayer.Initialized += (s, e) =>  
42.                  {  
43.                      // 动态图层集合   
44.                      DynamicLayerInfoCollection dynamicLayerInfoCollection = new DynamicLayerInfoCollection();  
45.  
46.                      // 符号   
47.                      LayerDrawingOptionsCollection layerDrawingOptionsCollection = new LayerDrawingOptionsCollection();  
48.  
49.                       
50.                      int counter = 0;  
51.                      foreach (string fileName in fileNames)  
52.                      {  
53.                          
54.                          DynamicLayerInfo dynamicLayerInfo = new DynamicLayerInfo  
55.                          {  
56.                                
57.                              ID = counter,  
58.  
59.                              
60.                              Name = "Dataset: " + fileName  
61.                          };  
62.  
63.                           
64.                          DataSource dataSource = null;  
65.  
66.                          
67.                          if (workspaceInfo.FactoryType == WorkspaceFactoryType.Raster)  
68.                          {  
69.                              
70.                              dataSource = new RasterDataSource  
71.                              {  
72.                                  
73.                                  DataSourceName = fileName,  
74.  
75.                                   
76.                                  WorkspaceID = workspaceInfo.Id  
77.                              };  
78.                          }  
79.                          else  
80.                          {  
81.                               
82.                              dataSource = new TableDataSource  
83.                              {  
84.                                 
85.                                  DataSourceName = fileName,  
86.  
87.                                   
88.                                  WorkspaceID = workspaceInfo.Id  
89.                              };  
90.  
91.                               
92.                              var layerDrawOpt = new LayerDrawingOptions()  
93.                              {  
94.                                    
95.                                  LayerID = counter,  
96.  
97.                                  // 简单渲染   
98.                                  Renderer = new SimpleRenderer() { Symbol = new SimpleMarkerSymbol() { } },  
99.                              };  
100.  
101.                                
102.                              layerDrawingOptionsCollection.Add(layerDrawOpt);  
103.                          }  
104.  
105.                           
106.                          dynamicLayerInfo.Source = new LayerDataSource { DataSource = dataSource };  
107.  
108.                         
109.                          dynamicLayerInfoCollection.Add(dynamicLayerInfo);  
110.  
111.                    
112.                          counter++;  
113.                      }  
114.  
115.                        
116.                      arcGisLocalDynamicMapServiceLayer.DynamicLayerInfos = dynamicLayerInfoCollection;  
117.  
118.                      // 这两个一一对应   
119.                      arcGisLocalDynamicMapServiceLayer.LayerDrawingOptions = layerDrawingOptionsCollection;  
120.  
121.                     
122.                      arcGisLocalDynamicMapServiceLayer.Refresh();  
123.  
124.                       
125.                      callback(arcGisLocalDynamicMapServiceLayer);  
126.                  };  
127.  
128.                 
129.                  arcGisLocalDynamicMapServiceLayer.Initialize();  
130.              });  
131.          }  
132.          catch (Exception ex)  
133.          {  
134.              MessageBox.Show(ex.Message,"Error",MessageBoxButton.OK,MessageBoxImage.Error);  
135.          }  
136.      }  

转自:http://blog.csdn.net/arcgis_cs/article/details/7858477