ae_feature的插入、复制和删除

1、插入

/// <summary>

///向featureclass中批量插入features ,批量插入features，用buffer的方法，要比循环一个个Store的方法快

///</summary>

/// <param name="pFeatureClass">操作数据所在的IFeatureClass</param>

private void InsertFeatures( IFeatureClass pFeatureClass , List< IGeometry> pGeos )

{

　　IFeatureBuffer pFeatBuf = pFeatureClass.CreateFeatureBuffer();

　　IFeature pFeat = pFeatBuf;

　　IFeatureCursor pFeatCur= pFeatureClass.Insert(true);

　　for(int i = 0 ;i< pGeos.Count ;i++)

　　{

　　pFeat.Shape = pGeos(i);

　　pFeatCur.InsertFeature(pFeatBuf);

　　//避免一次flush，导致速度过慢

　　if (i Mod 100 == 0 )

　　{

　　　　pFeatCur.Flush()

　　}

　　pFeatCur.Flush()

}

2、拷贝

/// <summary>

///复制一个IFeatureClass中的要素到另外一个当中

/// </summary>

/// <param name="pFromFeatureClass">源数据所在的IFeatureClass</param>       

/// <param name="pToFeatureClass">目标数据所在的IFeatureClass</param>

private void CopyFeatureClass(IFeatureClass pFromFeatureClass, IFeatureClass pToFeatureClass)

{

　　try {

　　　　IFeatureCursor pFromFeatureCursor = pFromFeatureClass.Search(null, false);

　　　　IFeatureCursor pToFeatureCursor = pToFeatureClass.Insert(true);

　　　　IFeatureBuffer pFeatureBuffer = pToFeatureClass.CreateFeatureBuffer();

　　　　IFeature pFromFeature = pFromFeatureCursor.NextFeature();

　　　　while (pFromFeature != null)

　　　　{

　　　　　　int IndexShape = pFeatureBuffer.Fields.FindField("Shape");

　　　　　　pFeatureBuffer.set_Value(IndexShape, pFromFeature);

　　　　　　pFeatureBuffer.Shape = pFromFeature.Shape;

　　　　　　pToFeatureCursor.InsertFeature(pFeatureBuffer);

　　　　　　pFromFeature = pFromFeatureCursor.NextFeature();

　　　　　　pFeatureBuffer = pToFeatureClass.CreateFeatureBuffer();

　　　　}

      　　pToFeatureCursor.Flush();

　　}

　　catch (Exception ex)

　　{

　　　　throw ex;

　　}

}

3、删除

///<summary>删除某featurelayer中所有feature

/// 该方法可以给一个queryfilter，进行删除符合条件的Ifeatures///</summary>

/// <param name="pLayer ">:操作的图层</param>

Private void DeleteAllFeatures(IFeatureLayer pLayer )

{

　　ITable pTable = pLayer.FeatureClass;

　　pTable.DeleteSearchedRows(null);

}