AE+C# 实现MERGE,

代码参考ESRI中国社区，忘了哪个帖子了。。。
代码中路径等直接写上去了

             // 合并图层的集合
            ILayer pLayer;
            IArray pArray;
            pArray  =   new  ArrayClass();
             for  ( int  i  =   0 ; i  <   this .axMapControl1.LayerCount; i ++ )
              {
                pLayer = this.axMapControl1.get_Layer(i);
                pArray.Add(pLayer);
               }
             // 定义输出图层的fields表

            ITable pTable;
            IFeatureLayer pFeatureLayer;
            IFeatureClass pFeatureClass;
            pLayer  =   this .axMapControl1.get_Layer( 0 );
            pTable  =  (ITable)pLayer;
            pFeatureLayer = (IFeatureLayer)pLayer;
            pFeatureClass  =  pFeatureLayer.FeatureClass;

             // 判断图层是否大于2个
             if ( this .axMapControl1.LayerCount <   2 )
             {
                MessageBox.Show("Table QI failed");
                return;
              }

             // 输出文件类型
            IFeatureClassName pFeatureClassName;
            IDatasetName pDatasetName;
            IWorkspaceName pNewWSName;
            pFeatureClassName  =   new  FeatureClassNameClass();
            pFeatureClassName.FeatureType  =  esriFeatureType.esriFTSimple;
            pFeatureClassName.ShapeFieldName  =   " Shape " ;
            pFeatureClassName.ShapeType  =  pFeatureClass.ShapeType;

             // 输出shapefile的名称和位置
            pNewWSName  =   new  WorkspaceNameClass();
            pNewWSName.WorkspaceFactoryProgID = " esriDataSourcesFile.ShapefileWorkspaceFactory " ;
            pNewWSName.PathName  =   " E:\\data " ;
            pDatasetName  =  (IDatasetName)pFeatureClassName;
            pDatasetName.Name  =   " Merge_result " ;
            pDatasetName.WorkspaceName  =  pNewWSName;
            
             // 合并图层
            IFeatureClass pOutputFeatClass;
            IBasicGeoprocessor pBasicGeop;
            pBasicGeop  =   new  BasicGeoprocessorClass();
            pOutputFeatClass = pBasicGeop.Merge(pArray,pTable,pFeatureClassName);

             // 将合并后的图层加载到Map中
            IFeatureLayer pOutputFeatLayer;
            pOutputFeatLayer  =   new  FeatureLayerClass();
           pOutputFeatLayer.FeatureClass  =  pOutputFeatClass;
            pOutputFeatLayer.Name  =  pOutputFeatClass.AliasName;
             this .axMapControl1.AddLayer(pOutputFeatLayer  as  ILayer,  0 );