ArcGIS官方提供的使用ConvertFeatureClass方法高效导出数据的代码示例

代码如下：

        public static void ConvertFeatureClass(IWorkspace sourceWorkspace, IWorkspace targetWorkspace, string nameOfSourceFeatureClass, string nameOfTargetFeatureClass, IQueryFilter pQueryFilter)
        {
            //create source workspace name
            IDataset sourceWorkspaceDataset = (IDataset)sourceWorkspace;
            IWorkspaceName sourceWorkspaceName = (IWorkspaceName)sourceWorkspaceDataset.FullName;


            //create source dataset name
            IFeatureClassName sourceFeatureClassName = new FeatureClassNameClass();
            IDatasetName sourceDatasetName = (IDatasetName)sourceFeatureClassName;
            sourceDatasetName.WorkspaceName = sourceWorkspaceName;
            sourceDatasetName.Name = nameOfSourceFeatureClass;


            //create target workspace name
            IDataset targetWorkspaceDataset = (IDataset)targetWorkspace;
            IWorkspaceName targetWorkspaceName = (IWorkspaceName)targetWorkspaceDataset.FullName;


            //create target dataset name
            IFeatureClassName targetFeatureClassName = new FeatureClassNameClass();
            IDatasetName targetDatasetName = (IDatasetName)targetFeatureClassName;
            targetDatasetName.WorkspaceName = targetWorkspaceName;
            targetDatasetName.Name = nameOfTargetFeatureClass;


            //Open input Featureclass to get field definitions.
            ESRI.ArcGIS.esriSystem.IName sourceName = (ESRI.ArcGIS.esriSystem.IName)sourceFeatureClassName;
            IFeatureClass sourceFeatureClass = (IFeatureClass)sourceName.Open();


            //Validate the field names because you are converting between different workspace types.
            IFieldChecker fieldChecker = new FieldCheckerClass();
            IFields targetFeatureClassFields;
            IFields sourceFeatureClassFields = sourceFeatureClass.Fields;
            IEnumFieldError enumFieldError;


            // Most importantly set the input and validate workspaces!
            fieldChecker.InputWorkspace = sourceWorkspace;
            fieldChecker.ValidateWorkspace = targetWorkspace;
            fieldChecker.Validate(sourceFeatureClassFields, out enumFieldError, out targetFeatureClassFields);


            // Loop through the output fields to find the geomerty field
            IField geometryField;
            for (int i = 0; i < targetFeatureClassFields.FieldCount; i++)
            {
                if (targetFeatureClassFields.get_Field(i).Type == esriFieldType.esriFieldTypeGeometry)
                {
                    geometryField = targetFeatureClassFields.get_Field(i);
                    // Get the geometry field's geometry defenition
                    IGeometryDef geometryDef = geometryField.GeometryDef;


                    //Give the geometry definition a spatial index grid count and grid size
                    IGeometryDefEdit targetFCGeoDefEdit = (IGeometryDefEdit)geometryDef;


                    targetFCGeoDefEdit.GridCount_2 = 1;
                    targetFCGeoDefEdit.set_GridSize(0, 0); //Allow ArcGIS to determine a valid grid size for the data loaded
                    targetFCGeoDefEdit.SpatialReference_2 = geometryField.GeometryDef.SpatialReference;


                    // we want to convert all of the features
                    //IQueryFilter queryFilter = new QueryFilterClass();
                    //queryFilter.WhereClause = "";


                    // Load the feature class
                    IFeatureDataConverter fctofc = new FeatureDataConverterClass();
                    //IEnumInvalidObject enumErrors = fctofc.ConvertFeatureClass(sourceFeatureClassName, queryFilter, null, targetFeatureClassName, geometryDef, targetFeatureClassFields, "", 1000, 0);
                    IEnumInvalidObject enumErrors = fctofc.ConvertFeatureClass(sourceFeatureClassName, pQueryFilter, null, targetFeatureClassName, geometryDef, targetFeatureClassFields, "", 1000, 0);

                    break;
                }
            }
        }

原文链接：  ConvertFeatureClass示例