转自原文arcengine 要素类的复制
using System;
using System.Collections.Generic;
using System.Text;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Carto;
namespace MyGISClass
{
/// <summary>
/// 该类主要包含了要素类的复制以及同要素类数据的加载
/// 函数主要用于SDE与Personal GDB之间数据的处理
/// </summary>
class FeatureClassDataManager
{
/// <summary>
/// 根据传入的源要素类OldFeatureClass,新空间范围,要素存储工作空间,新要素类名
/// 产生具有相同字段结构和不同空间范围的要素类
/// </summary>
/// <param name="OldFeatureClass">源要素类</param>
/// <param name="SaveFeatWorkspace">存储工作空间</param>
/// <param name="FeatClsName">新要素类名</param>
/// <param name="pDomainEnv">新空间范围,可为null</param>
/// <returns></returns>
public IFeatureClass CloneFeatureClassInWorkspace(IFeatureClass OldFeatureClass, IFeatureWorkspace SaveFeatWorkspace, string FeatClsName, IEnvelope pDomainEnv)
{
IFields pFields = CloneFeatureClassFields(OldFeatureClass, pDomainEnv);
return SaveFeatWorkspace.CreateFeatureClass(FeatClsName, pFields, null, null, esriFeatureType.esriFTSimple, OldFeatureClass.ShapeFieldName, "");
}
/// <summary>
/// 复制AnnotationClass,未完待续
/// </summary>
/// <param name="OldFeatureClass"></param>
/// <param name="SaveFeatWorkspace"></param>
/// <param name="FeatClsName"></param>
/// <param name="pDomainEnv"></param>
/// <returns></returns>
public IFeatureClass CloneAnnotationClassInWorkspace(IFeatureClass OldFeatureClass, IFeatureWorkspace SaveFeatWorkspace, string FeatClsName, IEnvelope pDomainEnv)
{
IFeatureWorkspaceAnno pFWSAnno = (IFeatureWorkspaceAnno)SaveFeatWorkspace;
IAnnoClass pAnnoClass = (IAnnoClass)OldFeatureClass.Extension;
return null;
}
/// <summary>
/// 将inFeatureClass要素类中所有符合pQueryFilter的要素复制到saveFeatureClass中,仅复制不做任何修改
/// </summary>
/// <param name="inFeatureClass">源要素类</param>
/// <param name="saveFeatureClass">存储要素类</param>
/// <param name="pQueryFilter">过滤参数</param>
/// <returns></returns>
public bool LoadFeatureClass(IFeatureClass inFeatureClass, IFeatureClass saveFeatureClass, IQueryFilter pQueryFilter)
{
//生成两个要素类字段的对应表
Dictionary<int, int> pFieldsDict = new Dictionary<int, int>();
this.GetFCFieldsDirectory(inFeatureClass, saveFeatureClass, ref pFieldsDict);
IFeatureCursor pinFeatCursor = inFeatureClass.Search(pQueryFilter, false);
long nCount = inFeatureClass.FeatureCount(pQueryFilter);
IFeature pinFeat = pinFeatCursor.NextFeature();
IFeatureCursor psaveFeatCursor = saveFeatureClass.Insert(true);
//使用IFeatureBuffer在内存中产生缓存避免多次打开,关闭数据库
IFeatureBuffer psaveFeatBuf = null;
IFeature psaveFeat = null;
long n = ;
while (pinFeat != null)
{
try
{
psaveFeatBuf = saveFeatureClass.CreateFeatureBuffer();
psaveFeat = psaveFeatBuf as IFeature;
if (inFeatureClass.FeatureType == esriFeatureType.esriFTAnnotation)
{
IAnnotationFeature pAF = (IAnnotationFeature)pinFeat;
IAnnotationFeature pNAF = (IAnnotationFeature)psaveFeat;
if (pAF.Annotation != null)
{
pNAF.Annotation = pAF.Annotation;
}
}
psaveFeat.Shape = pinFeat.Shape;
foreach (KeyValuePair<int, int> keyvalue in pFieldsDict)
{
if (pinFeat.get_Value(keyvalue.Key).ToString() == "")
{
if (psaveFeat.Fields.get_Field(keyvalue.Value).Type == esriFieldType.esriFieldTypeString)
{
psaveFeat.set_Value(keyvalue.Value, "");
}
else
{
psaveFeat.set_Value(keyvalue.Value, );
}
}
else
{
psaveFeat.set_Value(keyvalue.Value, pinFeat.get_Value(keyvalue.Key));
}
}
psaveFeatCursor.InsertFeature(psaveFeatBuf);
}
catch (Exception ex) { }
finally
{
psaveFeat = null;
n++;
if (n % == )
{
psaveFeatCursor.Flush();
}
pinFeat = pinFeatCursor.NextFeature();
}
}
psaveFeatCursor.Flush();
return true;
}
private IFields CloneFeatureClassFields(IFeatureClass pFeatureClass, IEnvelope pDomainEnv)
{
IFields pFields = new FieldsClass();
IFieldsEdit pFieldsEdit = (IFieldsEdit)pFields;
//根据传入的要素类,将除了shape字段之外的字段复制
long nOldFieldsCount = pFeatureClass.Fields.FieldCount;
long nOldGeoIndex = pFeatureClass.Fields.FindField(pFeatureClass.ShapeFieldName);
for (int i = ; i < nOldFieldsCount; i++)
{
if (i != nOldGeoIndex)
{
pFieldsEdit.AddField(pFeatureClass.Fields.get_Field(i));
}
else
{
IGeometryDef pGeomDef = new GeometryDefClass();
IGeometryDefEdit pGeomDefEdit = (IGeometryDefEdit)pGeomDef;
ISpatialReference pSR = null;
if (pDomainEnv != null)
{
pSR = new UnknownCoordinateSystemClass();
pSR.SetDomain(pDomainEnv.XMin, pDomainEnv.XMax, pDomainEnv.YMin, pDomainEnv.YMax);
}
else
{
IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;
pSR = CloneSpatialReference(pGeoDataset.SpatialReference);
}
//设置新要素类Geometry的参数
pGeomDefEdit.GeometryType_2 = pFeatureClass.ShapeType;
pGeomDefEdit.GridCount_2 = ;
pGeomDefEdit.set_GridSize(, );
pGeomDefEdit.AvgNumPoints_2 = ;
pGeomDefEdit.SpatialReference_2 = pSR;
//产生新的shape字段
IField pField = new FieldClass();
IFieldEdit pFieldEdit = (IFieldEdit)pField;
pFieldEdit.Name_2 = "shape";
pFieldEdit.AliasName_2 = "shape";
pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
pFieldEdit.GeometryDef_2 = pGeomDef;
pFieldsEdit.AddField(pField);
}
}
return pFields;
}
private ISpatialReference CloneSpatialReference(ISpatialReference pSrcSpatialReference)
{
double xmin, xmax, ymin, ymax;
pSrcSpatialReference.GetDomain(out xmin, out xmax, out ymin, out ymax);
ISpatialReference pSR = new UnknownCoordinateSystemClass();
pSR.SetDomain(xmin, xmax, ymin, ymax);
return pSR;
}
private void GetFCFieldsDirectory(IFeatureClass pFCold,IFeatureClass pFCnew,ref Dictionary<int,int> FieldsDictionary)
{
for(int i=;i<pFCold.Fields.FieldCount;i++)
{
string tmpstrold=pFCold.Fields.get_Field(i).Name.ToUpper();
switch(tmpstrold)
{
case "OBJECTID":
case "SHAPE":
case "SHAPE_LENGTH":
case "SHAPE_AREA":
case "FID":
{
//以上字段由系统自动生成
break;
}
default:
{
for(int j=;j<pFCnew.Fields.FieldCount;j++)
{
string tmpstrnew=pFCnew.Fields.get_Field(j).Name.ToUpper();
if(tmpstrold==tmpstrnew)
{
FieldsDictionary.Add(i,j);
break;
}
}
break;
}
}
}
}
}
}