关于WorkspaceEdit 的 UndoEditOperation问题???

<STRONG>关于WorkspaceEdit 的 UndoEditOperation问题???<BR></STRONG>
<P>  最近想做个关于地图编辑方面的程序,就是在地图上创建图形,修改图形形状,大小之类的,用的是AE+C#.但是当我从地理数据库中读取featureclass到map layer中时,进行图元编辑,编辑完成后,保存编辑.程序运行到pWorkspaceEdit.StopEditOperation();</P>
<P>还没执行pWorkspaceEdit.StopEditing(true);  </P>
<P>编辑的结果就已经存入了地理数据库中的featureclass中,不知道为什么会这样?</P>
<P>但是同样的代码,我从shp文件中读取数据到layer中,程序运行到pWorkspaceEdit.StopEditing(true); 才会将结果保存.不知道为什么从地理数据库中读的featureclass到layer中运行到pWorkspaceEdit.StopEditOperation();  就早早的保存完了结果.</P>
<P>粗略代码如下</P>
<P>IPropertySet pOutSDEPropset = new PropertySetClass();<BR>            pOutSDEPropset.SetProperty("USER", "sde");<BR>            pOutSDEPropset.SetProperty("PASSWORD", "wyf");<BR>            pOutSDEPropset.SetProperty("VERSION", "SDE.DEFAULT");<BR>            pOutSDEPropset.SetProperty("SERVER", "agrs-luxiangdong");<BR>            pOutSDEPropset.SetProperty("INSTANCE", "esri_sde");<BR>            IWorkspaceFactory WorkspaceFactory = new SdeWorkspaceFactoryClass();<BR>            FeatureWorkspace = (IFeatureWorkspace)WorkspaceFactory.Open(pOutSDEPropset, 0);<BR>            IFeatureLayer pflayer = new FeatureLayerClass();<BR>            IFeatureClass lfeatureclass = FeatureWorkspace.OpenFeatureClass("buildingmap");<BR>            pflayer.FeatureClass = lfeatureclass;<BR>            pflayer.Name = lfeatureclass.AliasName;</P>
<P>      axMapControl1.Map.AddLayer((ILayer)pflayer);</P>
<P>IDataset pDataset = (IDataset) pflayer.FeatureClass; </P>
<P>IWorkspaceEdit pWorkspaceEdit = (IWorkspaceEdit)pDataset.Workspace;</P>
<P>pWorkspaceEdit.StartEditing(true);                                  <BR>pWorkspaceEdit.EnableUndoRedo(); </P>
<P>pWorkspaceEdit.StartEditOperation(); </P>
<P>编辑过程..........</P>
<P>pWorkspaceEdit.StopEditOperation();  //程序到这一步就已经把结果存入进去了</P>
<P>pWorkspaceEdit.UndoEditOperation();  //此时已经不能撤销更改了</P>
<P>pWorkspaceEdit.StopEditing(true);      //最后这一句对结果保存没什么影响了,反正地理数据库中的结果已经改变了  </P>

<P>你写得并没有什么错误</P>

<P>    //IWorkspaceEdit Example</P>
<P><BR> </P>
<P>    //e.g., nameOfFeatureClass = "States"<BR>    //on ArcSDE use ISqlSyntax::QualifyTableName for fully qualified table names.<BR>    public void IWorkspaceEdit_Example(IWorkspace workspace, string nameOfFeatureClass)<BR>    {<BR>        IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspace;<BR>        IFeatureClass featureClass = featureWorkspace.OpenFeatureClass(nameOfFeatureClass);<BR>        IWorkspaceEdit workspaceEdit = (IWorkspaceEdit)workspace;<BR>        //start editing with undo redo functionality<BR>        workspaceEdit.StartEditing(true);<BR>        workspaceEdit.StartEditOperation();<BR>        IFeature feature = featureClass.GetFeature(1);<BR>        feature.Delete();<BR>        workspaceEdit.StopEditOperation();<BR>        Console.WriteLine("Would you like to undo your operation? Y or N");<BR>        string response = Console.ReadLine();<BR>        if(response.ToUpper() == "Y")<BR>        {<BR>            workspaceEdit.UndoEditOperation();<BR>        }<BR>        bool hasEdits = false;<BR>        workspaceEdit.HasEdits(ref hasEdits);<BR>        if (hasEdits)<BR>        {<BR>            Console.WriteLine("Would you like to save your edits? Y or N");<BR>            response = Console.ReadLine();<BR>            if (response.ToUpper() == "Y")<BR>            {<BR>                workspaceEdit.StopEditing(true);<BR>            }<BR>            else<BR>            {<BR>                workspaceEdit.StopEditing(false);<BR>            }<BR>        }<BR>    }</P>