ArcEngine对shp文件的操作（代码总结）

新建shp文件

public static void CreatShpFile(out string ErrorMsg, string shpFullFilePath, ISpatialReference spatialReference, esriGeometryType pGeometryType) {    ErrorMsg = "";    try {        string shpFolder = System.IO.Path.GetDirectoryName(shpFullFilePath);        string shpFileName = System.IO.Path.GetFileName(shpFullFilePath);        IWorkspaceFactory pWorkspaceFac = new ShapefileWorkspaceFactoryClass();        IWorkspace pWorkSpace = pWorkspaceFac.OpenFromFile(shpFolder, 0);        IFeatureWorkspace pFeatureWorkSpace = pWorkSpace as IFeatureWorkspace;        //如果文件已存在                       if (System.IO.File.Exists(shpFullFilePath)) {            if (MessageBox.Show("文件已存在，是否覆盖？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Asterisk) == DialogResult.Yes) {                IFeatureClass pFCChecker = pFeatureWorkSpace.OpenFeatureClass(shpFileName);                if (pFCChecker != null) {                    IDataset pds = pFCChecker as IDataset;                    pds.Delete();                }            } else {                return;            }        }        IFeatureClassDescription fcDescription = new FeatureClassDescriptionClass();        IObjectClassDescription pObjectDescription = (IObjectClassDescription) fcDescription;        IFields fields = pObjectDescription.RequiredFields;        int shapeFieldIndex = fields.FindField(fcDescription.ShapeFieldName);        IField field = fields.get_Field(shapeFieldIndex);        IGeometryDef geometryDef = field.GeometryDef;        IGeometryDefEdit geometryDefEdit = (IGeometryDefEdit) geometryDef;        //点        geometryDefEdit.GeometryType_2 = pGeometryType; //geometry类型        ISpatialReferenceFactory pSpatialRefFac = new SpatialReferenceEnvironmentClass(); //坐标系        //IProjectedCoordinateSystem pcsSys = pSpatialRefFac.CreateProjectedCoordinateSystem(pcsType);//投影坐标系        //geometryDefEdit.SpatialReference_2 = pcsSys;        int pcsType = (int) esriSRGeoCSType.esriSRGeoCS_WGS1984;        ISpatialReference spatialReference1 = pSpatialRefFac.CreateGeographicCoordinateSystem(pcsType);        geometryDefEdit.SpatialReference_2 = spatialReference1;        IFieldChecker fieldChecker = new FieldCheckerClass();        IEnumFieldError enumFieldError = null;        IFields validatedFields = null; //将传入字段 转成 validatedFields        fieldChecker.ValidateWorkspace = pWorkSpace;        fieldChecker.Validate(fields, out enumFieldError, out validatedFields);        pFeatureWorkSpace.CreateFeatureClass(shpFileName, validatedFields, pObjectDescription.InstanceCLSID, pObjectDescription.ClassExtensionCLSID, esriFeatureType.esriFTSimple, fcDescription.ShapeFieldName, "");    } catch(Exception ex) {        ErrorMsg = ex.Message;    }}

加载shp文件

public static void AddShp2Map(string shpfileFullFilePath, IMap pMap) {    string shpfileName = System.IO.Path.GetFileName(shpfileFullFilePath);    string shpfilePath = System.IO.Path.GetDirectoryName(shpfileFullFilePath);    IWorkspaceFactory workspaceFC = new ShapefileWorkspaceFactory();    IWorkspace workSpace = workspaceFC.OpenFromFile(shpfilePath, 0);    IFeatureWorkspace pFeatureWorkspace = (IFeatureWorkspace) workSpace;    IFeatureClass pFeatureClass = pFeatureWorkspace.OpenFeatureClass(shpfileName);    IFeatureLayer pFeatureLayer = new FeatureLayerClass();    pFeatureLayer.FeatureClass = pFeatureClass;    pFeatureLayer.Name = pFeatureClass.AliasName;    pMap.AddLayer(pFeatureLayer);}

导出shp文件

public static bool SelectedLayerExport(string mLayerName, string shpfileFullFilePath, IMap pMap, bool onlyExportSelected) {    //string layerName = System.IO.Path.GetFileNameWithoutExtension(shpfileFullFilePath);    string fileName = System.IO.Path.GetFileName(shpfileFullFilePath);    string fileNameWithouExtention = System.IO.Path.GetFileNameWithoutExtension(fileName);    string shpFileExportPath = System.IO.Path.GetDirectoryName(shpfileFullFilePath);    ISelectionSet pSelectionSet = null;    if (!System.IO.Directory.Exists(shpFileExportPath)) {        System.IO.Directory.CreateDirectory(shpFileExportPath);    }    try {        string outPath = shpFileExportPath;        ILayer mLayer = GetLayerByName(mLayerName, pMap);        if (mLayer == null) {            return false;        }        IFeatureLayer pFeatureLayer = mLayer as IFeatureLayer;        if (onlyExportSelected) {            IFeatureSelection pFeatureSelection = pFeatureLayer as IFeatureSelection;            pSelectionSet = pFeatureSelection.SelectionSet;        }        //export        IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;        IDataset pDataset = pFeatureClass as IDataset;        IDatasetName pDatasetName = (IDatasetName) pDataset.FullName;        IWorkspaceFactory pWsFactory = new ShapefileWorkspaceFactory();        IWorkspace outWorkSpace = pWsFactory.OpenFromFile(outPath, 0);        IDataset outDataSet = (IDataset) outWorkSpace;        IWorkspaceName workspaceName = (IWorkspaceName) outDataSet.FullName;        IFeatureClassName shpFeatureClassName = new FeatureClassNameClass();        IDatasetName shpDatasetName = (IDatasetName) shpFeatureClassName;        shpDatasetName.WorkspaceName = workspaceName;        shpDatasetName.Name = fileNameWithouExtention; //System.IO.Path.GetFileNameWithoutExtension(fileName);        // Use the IFieldChecker interface to make sure all of the field names are valid for the output shapefile.        IFieldChecker fieldChecker = new FieldCheckerClass();        IFields shapefileFields = null;        IEnumFieldError enumFieldError = null;        fieldChecker.InputWorkspace = pDataset.Workspace;        fieldChecker.ValidateWorkspace = outWorkSpace;        fieldChecker.Validate(pFeatureClass.Fields, out enumFieldError, out shapefileFields);        // We also need to retrieve the GeometryDef from the input feature class.        int shapeFieldPosition = pFeatureClass.FindField(pFeatureClass.ShapeFieldName);        IFields inputFields = pFeatureClass.Fields;        IField shapeField = inputFields.get_Field(shapeFieldPosition);        IGeometryDef geometryDef = shapeField.GeometryDef;        // Now we create a feature data converter to "Export" the selected features to a shapefile        IFeatureDataConverter2 featureDataConverter2 = new FeatureDataConverterClass();        IEnumInvalidObject enumInvalidObject = featureDataConverter2.ConvertFeatureClass(pDatasetName, null, pSelectionSet, null, shpFeatureClassName, geometryDef, shapefileFields, "", 1000, 0);        //IEnumInvalidObject enumErrors = featureDataConverter2.ConvertFeatureClass(pDatasetName, queryFilter, null,tFeatureClassName, geometryDef, tFields, "", 1000, 0);        return true;    } catch(Exception ex) {        MessageBox.Show(ex.Message);        return false;    }}

图层操作函数

//根据名称获取图层public static ILayer GetLayerByName(string layerName, IMap pMap) {    if (string.IsNullOrEmpty(layerName)) {        return null;    }    ILayer layer = null;    for (int i = 0; i < pMap.LayerCount; i++) {        ILayer pLayer = pMap.get_Layer(i);        if (pLayer is IGroupLayer || pLayer is ICompositeLayer) {            layer = GetSubLayer(layerName, pLayer as ICompositeLayer);            if (layer != null) {                break;            }        } else if (pLayer.Name == layerName) {            layer = pLayer;            break;        }    }    return layer;}public static ILayer GetSubLayer(string layerName, ICompositeLayer compositeLayer) {    ILayer mLayer = null;    for (int i = 0; i < compositeLayer.Count; i++) {        ILayer pLayer2 = compositeLayer.get_Layer(i);        if (pLayer2 is IGroupLayer || pLayer2 is ICompositeLayer) {            mLayer = GetSubLayer(layerName, pLayer2 as ICompositeLayer);            if (mLayer != null) {                break;            }        } else if (pLayer2.Name.Equals(layerName)) {            mLayer = pLayer2;            break;        }    }    return mLayer;}