Remove right click context menu from column headers XAML

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In my program I have a datagrid which is bound to an observable list. I want to be able to set the context menu to only display when a row is selected so that there wont be errors with nothing being selected. To do this I would like to be able to disable the context menu on the column headers. Here is the XAML:

XAML

<DataGrid Name="dgItems" AutoGenerateColumns="False" SelectionMode="Single" SelectionUnit="FullRow" CanUserAddRows="False" IsReadOnly="True">
  <DataGrid.ContextMenu>
      <ContextMenu>
          <MenuItem Header="Edit Item" Click="EditItem_Click"/>
          <MenuItem Header="Delete Item" Click="DeleteItem_Click"/>
      </ContextMenu>
  </DataGrid.ContextMenu>
   <DataGrid.Columns>
      <DataGridTextColumn Header="Caption" Binding="{Binding Caption}"/>
      <DataGridTextColumn Header="Details" Binding="{Binding Details}"/>
      <DataGridTextColumn Header="DateFrom" Binding="{Binding DateFrom}"/>
      <DataGridTextColumn Header="DateTo" Binding="{Binding DateTo}"/>
      <DataGridTextColumn Header="Source" Binding="{Binding Source}"/>
   </DataGrid.Columns>
</DataGrid>

How would I go about disabling the context menus on the headers? Thanks.

Posted 8-Oct-15 0:38am

KieranB95

Updated 23-Nov-18 16:25pm

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2 solutions

Solution 2

The proposed solution above does not work (or did not work for me anyway) as you need to test for DataGridRow as well, otherwise you always get null if you are actually right-clicking on a valid row. Here is what worked correctly for me:

        private void dgMP_MOCParts_PreviewMouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {
            DependencyObject DepObject = (DependencyObject)e.OriginalSource;

            while ((DepObject != null) && !(DepObject is DataGridColumnHeader) 
&& !(DepObject is DataGridRow))
            {
                DepObject = VisualTreeHelper.GetParent(DepObject);
            }

            if (DepObject == null)
            {
                return;
            }

            if (DepObject is DataGridColumnHeader)
            {
                dgMP_MOCParts.ContextMenu.Visibility = Visibility.Collapsed;
            }
            else
            {
                dgMP_MOCParts.ContextMenu.Visibility = Visibility.Visible;
            }
        }

Posted 23-Nov-18 16:26pm

nzmike

Updated 23-Nov-18 16:27pm

v2

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VR Karthikeyan · Accepted Answer · 2015-10-08T01:58:00

Use this code in PreviewMouseRightButtonDown event of DataGrid,

C#

private void DataGrid_PreviewMouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
    DependencyObject DepObject = (DependencyObject)e.OriginalSource;

    while ((DepObject != null) && !(DepObject is DataGridColumnHeader))
    {
        DepObject = VisualTreeHelper.GetParent(DepObject);
    }

    if (DepObject == null)
    {
        return;
    }

    if (DepObject is DataGridColumnHeader)
    {
          dgItems.ContextMenu.Visibility = Visibility.Collapsed;
    }
    else
    {
          dgItems.ContextMenu.Visibility = Visibility.Visible;
    }
}