ArcEngine CreateFeature与CreateFeatureBuffer

在ArcGIS Resouce Center中,ESRI介绍了两种创建Feature的方法（可以在本地的Geodatabase和sde的featureclass）

一、

IFeatureClass.CreateFeature，在这种方法最后需要加上IFeature.Store去提交创建的要素，本人认为这种方法相比下面一种方法更好些，因为Store的方法能够直接提交修改并在数据库中看到，不会因为其他复杂的操作影响数据入库。下面是在SDE库中创建IFeature的代码给大家参考一下:

IAoInitialize m_AoInitializa = new AoInitializeClass();
esriLicenseStatus pEsriLicenseStatus=m_AoInitializa.Initialize(esriLicenseProductCode.esriLicenseProductCodeEngineGeoDB);
 
IPropertySet propSet = new PropertySetClass();
propSet.SetProperty("SERVER", "192.168.1.145");
propSet.SetProperty("INSTANCE", "5151");
propSet.SetProperty("USER", "demo");
propSet.SetProperty("PASSWORD", "111111");
propSet.SetProperty("VERSION", "SDE.DEFAULT");
 
IWorkspaceFactory pwf = new SdeWorkspaceFactoryClass();
IFeatureWorkspace pFeatureWorkspace= (IFeatureWorkspace)(pwf.Open(propSet, 0)) ;
IFeatureClassfeaClass=pFeatureWorkspace.OpenFeatureClass("要打开的Featureclass名字");
 
IFeature feature = feaClass.CreateFeature();
feature.Shape=IGeometry;//(这里的IGeometry可以是IPolygon，IPolyline，IPoint)
 
int fieldindex = feature.Fields.FindField("字段名");
feature.set_Value(fieldindex, "字段值");

二、

IFeatureClass.CreateFeatureBuffer，这个方法采用插入游标（Insert Cursors）的方法，在面对大数据量插入的时候用IFeatureClass.CreateFeatureBuffer()效率比IFeatureClass.CreateFeature高

   public static void LoadDataToGDB(List<IFeature> FeaList, IFeatureWorkspace featureWorkspace, List<string> FieldsList, string shapeName, ProgressBarX progressBarX1)
        {
            #region 加载数据到gdb
            IFeatureClass sdeFeatureClass = featureWorkspace.OpenFeatureClass(shapeName);
            IQueryFilter queryFilter = new QueryFilterClass();
            queryFilter.WhereClause = null;
            IFeatureCursor pFeaCursor = sdeFeatureClass.Insert(true);
            IFeature pFeature = null;
            int iIndex = 0;
            int iIndexGDB = 0;
            long n = 0;
            for (int k = 0; k < FeaList.Count; k++)
            {
                pFeature = FeaList[k];
                IFields pField = pFeature.Fields;
                int IndexChage = pField.FindField("CHANGETYPE");
                string CHANGETYPE = pFeature.get_Value(IndexChage).ToString();
                bool IsNewAdd = false;
                if (CHANGETYPE == "2")
                {
                    IsNewAdd = true;
                }
                try
                {
                    IFeatureBuffer pFeaBuffer = sdeFeatureClass.CreateFeatureBuffer();
                    IFields pFieldGDB = pFeaBuffer.Fields;
                    pFeaBuffer.Shape = pFeature.ShapeCopy;
                  
                    //添加字段值
                    for (int j = 0; j < FieldsList.Count; j++)
                    {
                        string FiledName = FieldsList[j];
                        iIndex = pField.FindField(FiledName);
                        string FiledValue = "";
                        if (iIndex == -1)
                        {
                            FiledValue = GetDefaultValue(FiledName, IsNewAdd);
                        }
                        else
                        {
                            FiledValue = pFeature.get_Value(iIndex).ToString();
                        }

                        iIndexGDB = pFieldGDB.FindField(FiledName);
                        pFeaBuffer.set_Value(iIndexGDB, FiledValue);

                    }
                    pFeaCursor.InsertFeature(pFeaBuffer);
                }
                catch (System.Exception ex)
                {
                    //  MessageBox.Show("单要素写入异常！" + ex.Message, "提示");

                    // return;
                }
                finally //达到一定数量后释放资源
                {
                    n++;
                    if (n % 100 == 0)
                    {
                        pFeaCursor.Flush();
                    }


                }
                pFeaCursor.Flush();
                progressBarX1.Value = k;
            }


            #endregion
        }

三、

使用IFeatureClassWriter接口

public void DrawPoint(ILayer pLayer,double X,double Y)
        {
            IFeatureLayer pFeatureLayer = pLayer as IFeatureLayer;
            IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
            IFeatureClassWrite fr = pFeatureClass as IFeatureClassWrite;
            IFeature pFeature;
            IPoint pPoint;
 
            //pWorkspaceEdit.StartEditing(true);
            pWorkspaceEdit.StartEditOperation();
            pFeature = pFeatureClass.CreateFeature();
            pPoint = new PointClass();
            pPoint.PutCoords(X, Y);
            pFeature.Shape = pPoint;
            fr.WriteFeature(pFeature);
            pWorkspaceEdit.StopEditOperation();
        }