这里志列出关键代码,该代码不是

方法一：创建一个shape要素类，结果与导出要素类一致，保存使用store速度最慢，忽略

方法二：使用IFeatureBuffer速度较快，缺点：数据量大，导出的时候容易报内存损坏错误使程序崩溃，把arcgis lisence服务重启几次后有时能导出成功不会崩溃，没找到原因，如有解决方案，请告知，谢谢

private
static
void ExportShapeLayer(string filePath, IFeatureLayer featureLayer)

{

string parentPath = filePath.Substring(0, filePath.LastIndexOf(‘\\’));

string fcName = filePath.Substring(filePath.LastIndexOf(‘\\’) + 1, filePath.Length – filePath.LastIndexOf(‘\\’) – 1);

string filedir = parentPath.Substring(parentPath.LastIndexOf(‘\\’) + 1, parentPath.Length – parentPath.LastIndexOf(‘\\’) – 1);

DirectoryInfo directoryInfoPath = Directory.GetParent(parentPath);

IWorkspaceFactory pWorkSpaceFac = new
ShapefileWorkspaceFactoryClass();

IFeatureWorkspace pFeatureWorkSpace = pWorkSpaceFac.OpenFromFile(parentPath, 0) as
IFeatureWorkspace;

//创建字段集2

IFeatureClassDescription fcDescription = new
FeatureClassDescriptionClass();

IObjectClassDescription ocDescription = (IObjectClassDescription)fcDescription;//创建必要字段

IFields fields = ocDescription.RequiredFields;

int shapeFieldIndex = fields.FindField(fcDescription.ShapeFieldName);

IField field = fields.get_Field(shapeFieldIndex);

IGeometryDef geometryDef = field.GeometryDef;

IGeometryDefEdit geometryDefEdit = (IGeometryDefEdit)geometryDef;

if (featureLayer.FeatureClass.ShapeType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon)

{

geometryDefEdit.GeometryType_2 = ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon;

}

else
if (featureLayer.FeatureClass.ShapeType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline)

{

geometryDefEdit.GeometryType_2 = ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline;

}

else
if (featureLayer.FeatureClass.ShapeType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint)

{

geometryDefEdit.GeometryType_2 = ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint;

}

ESRI.ArcGIS.Geometry.IProjectedCoordinateSystem tProjectedCoordinateSystem = ((featureLayer as
IGeoDataset).SpatialReference) as ESRI.ArcGIS.Geometry.IProjectedCoordinateSystem;

geometryDefEdit.SpatialReference_2 = tProjectedCoordinateSystem;

IFieldChecker fieldChecker = new
FieldCheckerClass();

IEnumFieldError enumFieldError = null;

IFields validatedFields = null; //将传入字段 转成 validatedFields

fieldChecker.ValidateWorkspace = (IWorkspace)pFeatureWorkSpace;

fieldChecker.Validate(fields, out enumFieldError, out validatedFields);

IFeatureClass shpFeatureClass = pFeatureWorkSpace.CreateFeatureClass(fcName, validatedFields, ocDescription.InstanceCLSID, ocDescription.ClassExtensionCLSID, esriFeatureType.esriFTSimple, fcDescription.ShapeFieldName, “”);

for (int i = 0; i < featureLayer.FeatureClass.Fields.FieldCount; i++)

{

IField tfield = featureLayer.FeatureClass.Fields.get_Field(i);

if (tfield.Type == esriFieldType.esriFieldTypeBlob) continue;

if (filterArr.Contains(tfield.Name)) continue;

shpFeatureClass.AddField(tfield);

}

IFeatureLayer shpfeatureLayer = new
FeatureLayerClass();

shpfeatureLayer.FeatureClass = shpFeatureClass;

ITable tb = featureLayer.FeatureClass as
ITable;

IQueryFilter tQueryFilter = new
QueryFilterClass();

tQueryFilter.WhereClause = “”;

tQueryFilter.AddField(featureLayer.FeatureClass.OIDFieldName);

//计算要素总数

int totalCount = tb.RowCount(tQueryFilter);

ImportFeatureClassData_MarshalReleaseComObject(featureLayer, shpfeatureLayer, totalCount);

}

public
static
void ImportFeatureClassData_MarshalReleaseComObject(IFeatureLayer featureLayer, IFeatureLayer shpFeatureLayer, int totalCount)

{

try

{

int i = 0;

IFeatureClass shpFeatureClass = shpFeatureLayer.FeatureClass;

IFeatureBuffer pFeatureBuffer = shpFeatureClass.CreateFeatureBuffer();

IFeatureCursor pFeatureCursor = shpFeatureClass.Insert(true);

IFeatureCursor pFeatureCursorSource = featureLayer.FeatureClass.Search(null, false);

IFeature pFeatureSource = pFeatureCursorSource.NextFeature();

while (pFeatureSource != null)

{

i++;

ZzCom.CommonUtil.SimpleWaiterHelper.SetValue(i);

if (pFeatureSource.ShapeCopy == null)

{

pFeatureSource = pFeatureCursorSource.NextFeature();

continue;

}

IFeature pFeatureTarget = pFeatureBuffer as
IFeature;

ArcengineUtil.SetZValue(pFeatureTarget, pFeatureSource.ShapeCopy);

//修复几何，否则质检容易报自相交错误

IGeometry geometry = GeometryOperateHelper.SimplifyGeometry(pFeatureSource.ShapeCopy);

ArcengineUtil.SetZValue(pFeatureTarget, geometry);

pFeatureTarget.Shape = geometry;

IFields fields = FeatureOperatorUtil.CopyFields(pFeatureSource.Fields);

IFields tagerfields = FeatureOperatorUtil.CopyFields(pFeatureTarget.Fields);

Dictionary<int, int> tempdic = FeatureOperatorUtil.GetFieldMap(fields, tagerfields);

FeatureOperatorUtil.CopyFeatureAttribute(pFeatureSource, pFeatureTarget, tempdic);

//这里容易报内存损坏，继续执行会重复插入该记录造成记录有重复(原因：可能是频繁的读写)

pFeatureCursor.InsertFeature(pFeatureBuffer);

if (i % 500 == 0)

{

pFeatureCursor.Flush();

Marshal.FinalReleaseComObject(pFeatureTarget);

Marshal.FinalReleaseComObject(pFeatureSource);

Marshal.FinalReleaseComObject(pFeatureBuffer);

Marshal.FinalReleaseComObject(pFeatureCursor);

pFeatureTarget = null;

pFeatureSource = null;

pFeatureBuffer = null;

pFeatureCursor = null;

GC.Collect(); // 强制对所有代进行垃圾回收。

GC.WaitForPendingFinalizers(); //挂起当前线程，直到处理终结器队列的线程清空该队列为止。

pFeatureBuffer = shpFeatureClass.CreateFeatureBuffer();

pFeatureCursor = shpFeatureClass.Insert(true);

pFeatureTarget = pFeatureBuffer as
IFeature;

}

pFeatureSource = pFeatureCursorSource.NextFeature();

}

pFeatureCursor.Flush();

if (pFeatureCursor != null)

{

System.Runtime.InteropServices.Marshal.FinalReleaseComObject(pFeatureCursor);

pFeatureCursor = null;

}

if (pFeatureBuffer != null)

{

System.Runtime.InteropServices.Marshal.FinalReleaseComObject(pFeatureBuffer);

pFeatureBuffer = null;

}

if (pFeatureSource != null)

{

System.Runtime.InteropServices.Marshal.FinalReleaseComObject(pFeatureSource);

pFeatureSource = null;

}

if (pFeatureCursorSource != null)

{

System.Runtime.InteropServices.Marshal.FinalReleaseComObject(pFeatureCursorSource);

pFeatureCursorSource = null;

}

//释放

GC.Collect();

GC.WaitForPendingFinalizers();

ZzCom.CommonUtil.SimpleWaiterHelper.SetValue(totalCount);

Application.DoEvents();

}

catch (Exception e)

{

ZzLog4net.ZzLogUtil.Logger.LogInfo(string.Format(“异常信息:{0} 异常位置：{1} 时间：'{2}'”, e.Message, e.ToString(),

System.DateTime.Now));

throw e;

}

finally

{

ZzCom.CommonUtil.SimpleWaiterHelper.SetValue(totalCount);

Application.DoEvents();

}

}

方法三使用IFeatureDataConverter2或者IFeatureDataConverter,速度最快，缺点无法知道导出的要素总数和当前要素，无法做进度条,不知道arcgis使用的那种方法（求告知），速度快还有进度条，这个地方要注意把大字段处理了，处理方案可以把输出字段集拷贝一份，把大字段改成string类型，或者使用IFeatureDataConverter2像以下处理。

public
static
void ExportFeatureClassToShp(IFeatureLayer featureLayer, string ExportShapeFileName, string ExportFilePath,string exportShapeType)

{

try

{

IFeatureClass apFeatureClass = featureLayer.FeatureClass;

if (apFeatureClass == null)

{

MessageBox.Show(“请选择”, “系统提示”);

return;

}

if (ExportShapeFileName == “”)

return;

//设置导出要素类的参数

IFeatureClassName pOutFeatureClassName = new
FeatureClassNameClass();

IDataset pOutDataset = (IDataset)apFeatureClass;

pOutFeatureClassName = (IFeatureClassName)pOutDataset.FullName;

//IWorkspaceFactory pShpWorkspaceFactory = new ShapefileWorkspaceFactoryClass();

//IWorkspaceName pInWorkspaceName = new WorkspaceNameClass();

//pInWorkspaceName = pShpWorkspaceFactory.Create(ExportFilePath, ExportShapeFileName, null, 0);

IWorkspaceFactory pWorkSpaceFac = new
ShapefileWorkspaceFactoryClass();

IWorkspace workspace = pWorkSpaceFac.OpenFromFile(ExportFilePath, 0);

IFeatureDatasetName pInFeatureDatasetName = null;

IDataset outDataSet = workspace as
IDataset;

IWorkspaceName outWorkspaceName = outDataSet.FullName as
IWorkspaceName;

IFeatureClassName pInFeatureClassName = new
FeatureClassNameClass();

IDatasetName pInDatasetClassName;

pInDatasetClassName = (IDatasetName)pInFeatureClassName;

pInDatasetClassName.Name = ExportShapeFileName;//作为输出参数

pInDatasetClassName.WorkspaceName = outWorkspaceName;

long iCounter;

IFields pOutFields, pInFields;

IFieldChecker pFieldChecker;

IField pGeoField;

IEnumFieldError pEnumFieldError = null;

pInFields = apFeatureClass.Fields;

pFieldChecker = new
FieldChecker();

pFieldChecker.InputWorkspace = apFeatureClass.FeatureDataset.Workspace;

pFieldChecker.ValidateWorkspace = workspace;

pFieldChecker.Validate(pInFields, out pEnumFieldError, out pOutFields);

pGeoField = null;

for (iCounter = 0; iCounter < pOutFields.FieldCount; iCounter++)

{

if (pOutFields.get_Field((int)iCounter).Type == esriFieldType.esriFieldTypeGeometry)

{

pGeoField = pOutFields.get_Field((int)iCounter);

break;

}

}

List<int> FieldErrorList = new
List<int>();

IFieldError fieldError = pEnumFieldError.Next();

while (fieldError != null)

{

FieldErrorList.Add(fieldError.FieldIndex);

fieldError = pEnumFieldError.Next();

}

IQueryFilter InputQueryFilter = null;

ISelectionSet pSelectionSet = null;

if (exportShapeType.Equals(“所有要素”))

{

InputQueryFilter = new
QueryFilterClass();

InputQueryFilter.WhereClause = “”;

}

else
if (exportShapeType.Equals(“所选要素”))

{

InputQueryFilter = new
QueryFilterClass();

InputQueryFilter.WhereClause = “”;

IFeatureSelection pFeatureSelection = featureLayer as
IFeatureSelection;

//pFeatureSelection.SelectFeatures(InputQueryFilter, esriSelectionResultEnum.esriSelectionResultNew, false);

pSelectionSet = pFeatureSelection.SelectionSet;

}

else
if (exportShapeType.Equals(“视图范围内所有要素”))

{

IEnvelope env = EsriCtrlUtil.MapCtrl.Extent;

IGeometry geometry = env as
IGeometry;

ISpatialFilter spatialFilter = new
SpatialFilterClass();

spatialFilter.Geometry = geometry;

spatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;

InputQueryFilter = spatialFilter as
IQueryFilter;

InputQueryFilter.WhereClause = “”;

}

StringBuilder strBuilderSubFields = new
StringBuilder();

string subFields = “”;

IFields pFields = new
FieldsClass();

IFieldsEdit pFieldsEdit = (IFieldsEdit)pFields;

for (int i = 0; i < pOutFields.FieldCount; i++)

{

IField pField = pOutFields.get_Field(i);

if (pField.Type == esriFieldType.esriFieldTypeBlob ||

pField.Type == esriFieldType.esriFieldTypeRaster ||

pField.Type == esriFieldType.esriFieldTypeGUID) continue;

if (FieldErrorList.Contains(i))

continue;

pFieldsEdit.AddField(pField);

if (InputQueryFilter != null)

{

InputQueryFilter.AddField(pField.Name);

}

strBuilderSubFields.Append(pField.Name + “,”);

}

string SubFields = strBuilderSubFields.ToString().Substring(0, strBuilderSubFields.Length – 1);

if (InputQueryFilter != null)

{

InputQueryFilter.SubFields = SubFields;

}

IGeometryDef pOutGeometryDef;

IGeometryDefEdit pOutGeometryDefEdit;

pOutGeometryDef = pGeoField.GeometryDef;

pOutGeometryDefEdit = (IGeometryDefEdit)pOutGeometryDef;

pOutGeometryDefEdit.GridCount_2 = 1;

pOutGeometryDefEdit.set_GridSize(0, 1500000);

int strSubIndex = pOutDataset.Name.IndexOf(‘.’);

string fcName = pOutDataset.Name.Substring(strSubIndex + 1, pOutDataset.Name.Length – (strSubIndex + 1));

IFeatureClassName sourceFeatureClassName = new
FeatureClassNameClass();

sourceFeatureClassName = (IFeatureClassName)pOutDataset.FullName;

IDatasetName sourceDatasetName = (IDatasetName)sourceFeatureClassName;

IFeatureDataConverter2 pShpToClsConverter2 = new
FeatureDataConverterClass();

pShpToClsConverter2.ConvertFeatureClass(sourceDatasetName, InputQueryFilter, pSelectionSet, null, pInFeatureClassName, pOutGeometryDef, pOutFields, “”, 1000, 0);

}

catch (Exception ex)

{

throw ex;

}

}