UndoContext.SetAborted 方法
放弃自打开 UndoContext 对象以来对参与的打开文档所做的一切更改。
命名空间： EnvDTE
程序集： EnvDTE（在 EnvDTE.dll 中）
语法
声明
Sub SetAborted
void SetAborted()
void SetAborted()
abstract SetAborted : unit -> unit
function SetAborted()
备注
SetAborted 将打开的 UndoContext 对象的 IsAborted 属性设置为 true。在这种情况下，自打开 UndoContext 对象到关闭 UndoContext 对象为止，对参与的文档所做的一切更改都将被放弃。
示例
Sub SetAbortedExample()
' Before running, select text in an open document.
Dim txtSel As TextSelection
Dim strTS As String, strAnswer As String, bIsOpen As Boolean
txtSel = DTE.ActiveDocument.Selection
strTS = txtSel.Text
' Check to see if UndoContext object is already open.
If DTE.UndoContext.IsOpen = True Then
bIsOpen = True
Else
' Open the UndoContext object to track changes.
DTE.UndoContext.Open("RemoveNewLines", False)
End If
MsgBox("Current IsAborted value: " & DTE.UndoContext.IsAborted)
' Perform search for newline characters and remove them.
If strTS <> "" Then
txtSel.Delete()
strTS = Replace(strTS, vbNewLine, "", Compare:=vbTextCompare)
txtSel.Insert(strTS)
End If
' Check to see if you want to discard changes.
strAnswer = MsgBox("Do you want to discard all changes made?", vbYesNo & vbQuestion)
If strAnswer = True Then
DTE.UndoContext.SetAborted()
MsgBox("Current IsAborted value: " & DTE.UndoContext.IsAborted)
End If
' If UndoContext was already open, don't close it.
If bIsOpen = True Then
' Close the UndoContext object to commit the changes.
DTE.UndoContext.Close()
End If
End Sub
.NET Framework 安全性
- 对直接调用方的完全信任。此成员不能由部分信任的代码使用。有关更多信息，请参见通过部分受信任的代码使用库。