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DataDOMEvent.IsUndoRedo property

Gets a value indicating whether the data validation event occurs during an undo operation or a redo operation.

Namespace:  Microsoft.Office.Interop.InfoPath
Assembly:  Microsoft.Office.Interop.InfoPath (in Microsoft.Office.Interop.InfoPath.dll)

Syntax

'Declaration
ReadOnly Property IsUndoRedo As Boolean
    Get
'Usage
Dim instance As DataDOMEvent
Dim value As Boolean

value = instance.IsUndoRedo
bool IsUndoRedo { get; }

Property value

Type: System.Boolean

Remarks

When an undo or a redo operation takes place, the form's underlying XML document is placed in a read-only state and cannot be modified. This can sometimes occur during an OnAfterChange event; when it does, the IsUndoRedo property is used to bypass the data validation that it contains.

Examples

In the following example, the IsUndoRedo property is used to determine whether the event is occurring during an undo or redo operation. If it is, the event handler is exited using the return statement, otherwise the custom function Calculate is called:

public void field1_OnAfterChange(DataDOMEvent e)
{
 if (e.IsUndoRedo)
 {
  // An undo or redo operation has occurred and the DOM is read-only.
  return;
 }
 Calculate();
}

See also

Reference

DataDOMEvent interface

DataDOMEvent members

Microsoft.Office.Interop.InfoPath namespace