DTE2.UndoContext 屬性

發行項
08/12/2011

取得全域 UndoContext 物件。

命名空間： EnvDTE80
組件： EnvDTE80 (在 EnvDTE80.dll 中)

語法

'宣告
ReadOnly Property UndoContext As UndoContext
    Get

UndoContext UndoContext { get; }

property UndoContext^ UndoContext {
    UndoContext^ get ();
}

abstract UndoContext : UndoContext

function get UndoContext () : UndoContext

屬性值

型別：EnvDTE.UndoContext
UndoContext 物件。

實作

_DTE.UndoContext

範例

Sub UndoContextExample()
   Dim selection As TextSelection = DTE2.ActiveDocument.Selection()
   Dim start As EditPoint = selection.TopPoint.CreateEditPoint()
   Dim endpt As TextPoint = selection.BottomPoint
   Dim commentStart As String

   DTE2.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.
      DTE2.UndoContext.Close()
   End Try
End Sub