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：

 

             

 OpenFileDialog openFileDialog = new OpenFileDialog();            openFileDialog.Filter = "Image files (*.bmp,*.png,*.sid,*.tif)|*.bmp;*.png;*.sid;*.tif;";             openFileDialog.RestoreDirectory = true;            openFileDialog.Multiselect = true;            if (openFileDialog.ShowDialog() == true)            {                try                {                    // // 添加栅格                    AddFileDatasetToDynamicMapServiceLayer(WorkspaceFactoryType.Raster,                       Path.GetDirectoryName(openFileDialog.FileName),                       new List<string>(openFileDialog.SafeFileNames),                       arcGisLocalDynamicMapServiceLayer =>                       {                                                    _map.Layers.Add(arcGisLocalDynamicMapServiceLayer);                       });                }                catch (Exception ex)                {                    MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);                }            }

 

  public void AddFileDatasetToDynamicMapServiceLayer(WorkspaceFactoryType workspaceType, string directoryPath, List<string> fileNames, Action<ArcGISLocalDynamicMapServiceLayer> callback)        {            try            {                // 产生UID                string uniqueId = Guid.NewGuid().ToString();                // 工作空间信息                WorkspaceInfo workspaceInfo = new WorkspaceInfo(uniqueId, workspaceType, "DATABASE=" + directoryPath);                // 本地服务，该方法是NET3新特性                LocalMapService localMapService = new LocalMapService                {                                       Path = _emptyMpkPath,                    //这个属性很关键                    EnableDynamicLayers = true                };                // 给动态地图服务注册工作空间                localMapService.DynamicWorkspaces.Add(workspaceInfo);                // 异步方法在ArcGIS Runtime中处处可见                localMapService.StartAsync(x =>                {                                        ArcGISLocalDynamicMapServiceLayer arcGisLocalDynamicMapServiceLayer = null;                                        arcGisLocalDynamicMapServiceLayer = new ArcGISLocalDynamicMapServiceLayer(localMapService)                    {                        // 工作空间ID                        ID = "Workspace: " + (new DirectoryInfo(directoryPath)).Name,                                                //动态图层                        EnableDynamicLayers = true,                    };                                        arcGisLocalDynamicMapServiceLayer.Initialized += (s, e) =>                    {                        // 动态图层集合                        DynamicLayerInfoCollection dynamicLayerInfoCollection = new DynamicLayerInfoCollection();                        // 符号                        LayerDrawingOptionsCollection layerDrawingOptionsCollection = new LayerDrawingOptionsCollection();                                               int counter = 0;                        foreach (string fileName in fileNames)                        {                                                      DynamicLayerInfo dynamicLayerInfo = new DynamicLayerInfo                            {                                                                ID = counter,                                                              Name = "Dataset: " + fileName                            };                                                       DataSource dataSource = null;                                                      if (workspaceInfo.FactoryType == WorkspaceFactoryType.Raster)                            {                                                              dataSource = new RasterDataSource                                {                                                                      DataSourceName = fileName,                                                                       WorkspaceID = workspaceInfo.Id                                };                            }                            else                            {                                                               dataSource = new TableDataSource                                {                                                                     DataSourceName = fileName,                                                                       WorkspaceID = workspaceInfo.Id                                };                                                               var layerDrawOpt = new LayerDrawingOptions()                                {                                                                        LayerID = counter,                                    // 简单渲染                                    Renderer = new SimpleRenderer() { Symbol = new SimpleMarkerSymbol() { } },                                };                                                                layerDrawingOptionsCollection.Add(layerDrawOpt);                            }                                                       dynamicLayerInfo.Source = new LayerDataSource { DataSource = dataSource };                                                     dynamicLayerInfoCollection.Add(dynamicLayerInfo);                                                counter++;                        }                                                arcGisLocalDynamicMapServiceLayer.DynamicLayerInfos = dynamicLayerInfoCollection;                        // 这两个一一对应                        arcGisLocalDynamicMapServiceLayer.LayerDrawingOptions = layerDrawingOptionsCollection;                                             arcGisLocalDynamicMapServiceLayer.Refresh();                                               callback(arcGisLocalDynamicMapServiceLayer);                    };                                     arcGisLocalDynamicMapServiceLayer.Initialize();                });            }            catch (Exception ex)            {                MessageBox.Show(ex.Message,"Error",MessageBoxButton.OK,MessageBoxImage.Error);            }        }

 

效果如下：