连接SDE后读取显示其中的矢量数据

首先老规矩新建工作空间，采用文件连接的方式：

                IWorkspaceFactory pWorkspaceFactory = new SdeWorkspaceFactoryClass(); 

​                IWorkspace pWorkspace = pWorkspaceFactory.OpenFromFile (SDEPath,0);

既然要访问矢量数据就QI到​IFeatureWorkspace 接口：

 

                IFeatureWorkspace pSDEFeatureWorkspace = (IFeatureWorkspace)pWorkspace;

创建​IFeatureLayer 图层：

                IFeatureClass pSDEFeatureClass = pSDEFeatureWorkspace.OpenFeatureClass(textBox_Name.Text);

                IFeatureLayer pFeatureLayer = new FeatureLayer();

                pFeatureLayer.FeatureClass = pSDEFeatureClass;

加载图层到MapControl中：​

                IMapControl4 paxMapControl1 = LinkSDE.Form1.paxMapControl1;

                paxMapControl1.Map.AddLayer(pFeatureLayer);

这与通过工作空间来加载shapefile文件的方式很像对吧。