Share via


UndoContext.Close Method

Ends an undo operation.

Namespace:  EnvDTE
Assembly:  EnvDTE (in EnvDTE.dll)

Syntax

'Declaration
Sub Close
void Close()
void Close()
abstract Close : unit -> unit
function Close()

Remarks

If there are pending references to the UndoContext object, then Close aborts the operation and raises an error. An error occurs if the UndoContext object is not open when Close is called.

Examples

Sub RemoveNewLines()
   ' Before running, select text in an open document.
   Dim txtSel As TextSelection
   Dim strTS As String, boolWasOpen As Boolean
   txtSel = DTE.ActiveDocument.Selection
   strTS = txtSel.Text

   ' Check to see if UndoContext object is already open.
   If DTE.UndoContext.IsOpen = True Then
      boolWasOpen = True
   Else
      ' Open the UndoContext object to track changes.
      DTE.UndoContext.Open("RemoveNewLines", False)
   End If

   ' Perform search for newline characters and remove them.
   If strTS <> "" Then
      txtSel.Delete()
      strTS = Replace(strTS, vbNewLine, "", Compare:=vbTextCompare)
      txtSel.Insert(strTS)
   End If

   ' If UndoContext was already open, don't close it.
   If boolWasOpen = False Then
      ' Close the UndoContext object to commit the changes.
      DTE.UndoContext.Close()
   End If
End Sub

.NET Framework Security

See Also

Reference

UndoContext Interface

EnvDTE Namespace