Geodatabase - 修改字段别名(Field Alias)

　　以下代码演示的是通过个人数据库打开要素类,并对指定的字段别名进行修改,其中,需要注意的是,不能通过Engine中的AxMapControl直接获得,如

  //直接获得IFeatureClass.

 //ESRI.ArcGIS.Carto.ILayer lyr = mapCtrl_main.get_Layer(0);

 //ESRI.ArcGIS.Carto.IFeatureLayer flyr = (ESRI.ArcGIS.Carto.IFeatureLayer)lyr;

 //ESRI.ArcGIS.Geodatabase.IFeatureClass fc = flyr.FeatureClass;

　　这样是不可以的:

 /// <summary>

         /// 修改字段别名.

         /// </summary>

         /// <param name="personalWorkspacePath">个人数据库路径(当然可以为其他类型数据库),如"G:\doc\gis\1.400\data\pdb.mdb"</param>

         /// <param name="featureClassName">要素类名,如"hyd1_4l_1"</param>

         /// <param name="oriFieldName">原字段别名,如"FNODE_".</param>

         /// <param name="desFieldName">新字段别名,如"fnode".</param>

         private void AlterFieldAliasName(string personalWorkspacePath, string featureClassName, string oriFieldName, string desFieldName) {

             //通过IFeatureWorkspace获得IFeatureClass.

             ESRI.ArcGIS.Geodatabase.IWorkspaceFactory wsf = new ESRI.ArcGIS.DataSourcesGDB.AccessWorkspaceFactoryClass();

             ESRI.ArcGIS.Geodatabase.IWorkspace ws = wsf.OpenFromFile(personalWorkspacePath, );

             ESRI.ArcGIS.Geodatabase.IFeatureWorkspace fws = (ESRI.ArcGIS.Geodatabase.IFeatureWorkspace)ws;

             ESRI.ArcGIS.Geodatabase.IFeatureClass fc = fws.OpenFeatureClass(featureClassName);

             ESRI.ArcGIS.Geodatabase.ITable t = (ESRI.ArcGIS.Geodatabase.ITable)fc;

             if (t.FindField(oriFieldName) == -)    //无指定字段名.

                 return;

             ESRI.ArcGIS.Geodatabase.IObjectClass objClass = (ESRI.ArcGIS.Geodatabase.IObjectClass)fc;

             ESRI.ArcGIS.Geodatabase.ISchemaLock slock = (ESRI.ArcGIS.Geodatabase.ISchemaLock)objClass;

             try {

                 slock.ChangeSchemaLock(ESRI.ArcGIS.Geodatabase.esriSchemaLock.esriExclusiveSchemaLock);

                 ESRI.ArcGIS.Geodatabase.IClassSchemaEdit cSchemaEdit = (ESRI.ArcGIS.Geodatabase.IClassSchemaEdit)t;

                 cSchemaEdit.AlterFieldAliasName(oriFieldName, desFieldName);

                 MessageBox.Show("done");

             }

             catch (System.Exception ex) {

                 MessageBox.Show(ex.Message);

             }

             finally {

                 if (slock != null)

                     slock.ChangeSchemaLock(ESRI.ArcGIS.Geodatabase.esriSchemaLock.esriSharedSchemaLock);

             }

         }