ArcGIS Engine地图查询

//IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, true); IFeatureCursor pFeatureCursor = pFeatureClass.Search(null, false); List pFeatures = new List(); IFeature pFeature = pFeatureCursor.NextFeature(); while (pFeature != null) {

pFeatures.Add(pFeature);

pFeature = pFeatureCursor.NextFeature(); }

for (int i = 0; i < pFeatures.Count; i++) {

MessageBox.Show(((pFeatures.Shape as IPolygon) as IArea).Area.ToString()); }

分析：pFeatures集合存储了指向FeatureClass上所有Feature的引用，但是由于Recycling参数设置为False也就是说每执行一个NextFeautre方法上一条记录的Feature值在内存中依然存在，所以到最后遍历pFeatures集合的时候所有的IFeature引用指向的Feature对象都依然存在。所以会执行的很Happy（如下图8所示）：