1.Join到SQL中的表

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           IFeatureLayer pFeatureLayer = axMapControl1.Map.get_Layer(0) as IFeatureLayer;  
           IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;  
           IWorkspaceFactory pWsFact;  
           IWorkspace pWorkspace;   
           pWsFact = new OLEDBWorkspaceFactoryClass();  
           IPropertySet pPropertySet=new PropertySetClass();  
           pPropertySet.SetProperty("CONNECTSTRING", "Provider=SQLOLEDB;server=.;database=test;User Id=sa;Password=123");  
           pWorkspace = pWsFact.Open(pPropertySet, 0);  
           IFeatureWorkspace pFeatWS = (IFeatureWorkspace)pWorkspace;  
           ITable pOleTable = pFeatWS.OpenTable(inTable);  
           IMemoryRelationshipClassFactory pMemRelFact = new MemoryRelationshipClassFactoryClass();  
           IRelationshipClass pRelClass = pMemRelFact.Open("", pFeatureClass, "村", (IObjectClass)pOleTable, "cunWei", "forward", "backward", esriRelCardinality.esriRelCardinalityOneToOne);  
           IDisplayRelationshipClass pDispRC=pFeatureLayer as IDisplayRelationshipClass;  
           pDispRC.DisplayRelationshipClass(pRelClass, esriJoinType.esriLeftOuterJoin); 

 

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