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pianoboy11
1285
Create common context menu in WPF
posted

This is more of a general WPF question than your controls, I tried posting on Expert Exchange and Stack Overflow without any success.  So I thought you might be able to help.

n my app I have many grids (Infragistics). I would like to create a context menu that will implement many of the common functions ie: delete, save layout, etc. and if a specific grid needs more than the common functions be able to add to the menu for that grid. I would like to create one context menu and not have to repeat the same code throughout project.

I have no idea on how to accomplish this. Possible? Example xaml and/or code will be helpful.

Thanks a bunch,

Rick

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  • 1285
    Verified Answer
    posted in reply to [Infragistics] Curtis Taylor

    Here is my solution I came up with:

    I created  a resource dictionary with code behind to hold my context menu (http://stackoverflow.com/questions/92100/is-it-possible-to-set-code-behind-a-resource-dictionary-in-wpf-for-event-handling):
    <

    resourcedictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"><ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                       xmlns:sys="clr-namespace:System;assembly=mscorlib"
                       x:Class="DCS.CAPPS.ResourceDictionaries.GridContextMenu"
                       x:ClassModifier="public">
       <x:Array Type="{x:Type sys:Object}" x:Key="GridContextMenu">
           <MenuItem Header="Test" Name="Test" Click="Test_Click"/>
       </x:Array>
    </ResourceDictionary>

    GRID:
    <igDP:XamDataGrid.ContextMenu>
                               <ContextMenu Opened="ContextMenu_Opened">
                                   <ContextMenu.ItemsSource>
                                       <CompositeCollection>
                                           <CollectionContainer Collection="{StaticResource GridContextMenu}"/>
                                       </CompositeCollection>
                                   </ContextMenu.ItemsSource>
                               </ContextMenu>
                           </igDP:XamDataGrid.ContextMenu><igDP:XamDataGrid.ContextMenu>
                               <ContextMenu Opened="ContextMenu_Opened">
                                   <ContextMenu.ItemsSource>
                                       <CompositeCollection>
                                           <CollectionContainer Collection="{StaticResource GridContextMenu}"/>
                                       </CompositeCollection>
                                   </ContextMenu.ItemsSource>
                               </ContextMenu>
                           </igDP:XamDataGrid.ContextMenu>

    To get the to the grid in the event handler I needed to do this in the context opened handler:
    private void ContextMenu_Opened(object sender, RoutedEventArgs e)
           {
               ContextMenu c = sender as ContextMenu;
               CompositeCollection col = c.ItemsSource as CompositeCollection;
               CollectionContainer col2 = col[0] as CollectionContainer;

               foreach (object item in col2.Collection)
               {
                   MenuItem m = item as MenuItem;
                   if (m != null)
                   {
                       m.CommandParameter = c;
                   }
               }
           }
    And in the click handler in the resource code:
    private void Test_Click(object sender, RoutedEventArgs e)
           {
               MenuItem mi = sender as MenuItem;
               ContextMenu cm = mi.CommandParameter as ContextMenu;
               XamDataGrid grid = cm.PlacementTarget as XamDataGrid;

               if (grid != null)
                   MessageBox.Show("Works");
               else
                   MessageBox.Show("Does Not work");
           }