How to Cancel Datagrid selection changed event in WPF? -

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I know that before this question has been asked, but I can not find what I'm looking for. 

  Private Zero DataGrid 1_SelectionChanged (Object Sender, SelectionChangedEventArgs e) {if (oOrdItem.ItemNo == 0) {e.Handled = true; MessageBox.Show ("Please save items", "save"); Return; }}   
 Even if I call  e.handed = true;  This will select the DataGrade line I  dataGrid1.SelectedIndex = 1; Do not want to call  because it will trigger the re-selection event. I also have  dataGrid1.UnSelectAll ();  Have tried any other way to cancel selections?   
 
 
 Do you think of an alternative implementation? I am thinking of a check method before changing  binding  and  SelectedItem . One illustration:  
  & lt; DataGrade ItemSource = "..." selectedEystem = "{Binding Selected Entry}" />   
 and the underlying VM may look like this:  
  public class sampleVM: seeModelBase // assuming that you use this kind of base class Are {Private Objects} Selected Entry; Public Entry Selected Entry {Get {return_selectedEntry; } Set {ifPHP (SavePrevItem ()) returns; _selectedEntry = value; RaisePropertyChanged ("SelectedItem"); // or something similar}} Private Butt Save Pravity () {// Your logic here}}

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