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 = 0; 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, 0); } } else { psaveFeat.set_Value(keyvalue.Value, pinFeat.get_Value(keyvalue.Key)); } } psaveFeatCursor.InsertFeature(psaveFeatBuf); } catch (Exception ex) { } finally { psaveFeat = null; n++; if (n % 2000 == 0) { 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 = 0; 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 = 1; pGeomDefEdit.set_GridSize(0, 10); pGeomDefEdit.AvgNumPoints_2 = 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=0;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=0;j<pFCnew.Fields.FieldCount;j++) { string tmpstrnew=pFCnew.Fields.get_Field(j).Name.ToUpper(); if(tmpstrold==tmpstrnew) { FieldsDictionary.Add(i,j); break; } } break; } } } } } }
没有整理与归纳的知识，一文不值！高度概括与梳理的知识，才是自己真正的知识与技能。 永远不要让自己的自由、好奇、充满创造力的想法被现实的框架所束缚，让创造力自由成长吧！ 多花时间，关心他（她）人，正如别人所关心你的。理想的腾飞与实现，没有别人的支持与帮助，是万万不能的。
本文转自wenglabs博客园博客，原文链接：http://www.cnblogs.com/arxive/p/6262786.html
，如需转载请自行联系原作者
