AddIN Sample學習 之AddInEditorExtension 編輯器擴展

編輯器擴展，實現對要素的新建、編輯事件的監聽。

可能的使用方式，比如希望在新建要素的時候，給要素自動增加Guid值、創建時間、系統用戶名等，用以對要素的創建、修改進行記錄。

核心代碼如下：

protected override void OnStartup()
        {
            IEditor theEditor = ArcMap.Editor;

            Events.OnStartEditing += new IEditEvents_OnStartEditingEventHandler(Events_OnStartEditing);
            Events.OnStopEditing += new IEditEvents_OnStopEditingEventHandler(Events_OnStopEditing);
        }

        private void Events_OnStopEditing(bool save)
        {
            Events.OnCreateFeature += new IEditEvents_OnCreateFeatureEventHandler(Events_OnCreateChangeFeature);
            Events.OnChangeFeature += new IEditEvents_OnChangeFeatureEventHandler(Events_OnCreateChangeFeature);
        }

        private void Events_OnCreateChangeFeature(IObject obj)
        {
            IFeature pFeature = obj as IFeature;
            if (pFeature.Fields.FindField("Guid") != -1)
            {
                pFeature.set_Value(pFeature.Fields.FindField("Guid"), Guid.NewGuid().ToString());
            }

            if (pFeature.Fields.FindField("CreateTime") != -1)
            {
                pFeature.set_Value(pFeature.Fields.FindField("CreateTime"), DateTime.Now);
            }

            if (pFeature.Fields.FindField("CreateUser") != -1)
            {
                pFeature.set_Value(pFeature.Fields.FindField("CreateUser"), System.Environment.UserName);
            }

            //System.Diagnostics.Debug.WriteLine(pFeature.OID+":處理完成");
        }

        void Events_OnStartEditing()
        {
            Events.OnCreateFeature += new IEditEvents_OnCreateFeatureEventHandler(Events_OnCreateChangeFeature);
        }