轉載－IFeatureLayer和IFeatureClass的Search方法的區別

查看IfeatureLayer的Search方法的協助，如下：

If there is a definition query set on the layer, the Search method will work on the subset of features in the layer that meet the definition criteria. Otherwise, it will search the FeatureClass associated with the layer.

This Search method will not work on joined fields. If the FeaureLayer has any joins, you should use the IGeoFeatureLayer::SeachDisplayFeatures method instead.

值得注意的是，如果圖層沒有設定definition query ，那麼兩者的結果沒有差別，但是如果圖層設定了definition query ，那麼就有差別了，呵呵。