_DTE.UndoContext 属性

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定义

命名空间:

EnvDTE

程序集:

EnvDTE.dll

获取全局 UndoContext 对象。

public:
 property EnvDTE::UndoContext ^ UndoContext { EnvDTE::UndoContext ^ get(); };

public:
 property EnvDTE::UndoContext ^ UndoContext { EnvDTE::UndoContext ^ get(); };

[System.Runtime.InteropServices.DispId(235)]
public EnvDTE.UndoContext UndoContext { [System.Runtime.InteropServices.DispId(235)] get; }

[<System.Runtime.InteropServices.DispId(235)>]
[<get: System.Runtime.InteropServices.DispId(235)>]
member this.UndoContext : EnvDTE.UndoContext

Public ReadOnly Property UndoContext As UndoContext

属性值

UndoContext

UndoContext 对象。

属性

DispIdAttribute

示例

Sub UndoContextExample()  
   Dim selection As TextSelection = DTE.ActiveDocument.Selection()  
   Dim start As EditPoint = selection.TopPoint.CreateEditPoint()  
   Dim endpt As TextPoint = selection.BottomPoint  
   Dim commentStart As String  

   DTE.UndoContext.Open("Comment Region")  
   Try  
      Do While (start.LessThan(endpt))  
         start.Insert(commentStart)  
         start.LineDown()  
         start.StartOfLine()  
      Loop  
   Finally  
      ' If an error occured, then need to make sure that the undo   
      ' context is cleaned up. Otherwise, the editor can be left in a   
      ' perpetual undo context.  
      DTE.UndoContext.Close()  
   End Try  
End Sub