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

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;
}
}
}