DevExpress WPF Ribbon ApplicationMenu

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4.00/5 (2 votes)

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Hello All:

I want to create a menu like MS-Office 2007, Dinamically. Here's my XAML:

<Grid>
 <dxb:BarManager HorizontalAlignment="Left" Margin="15,15,0,0" Name="barManager1" VerticalAlignment="Top"></dxb:BarManager>
  <dxb:BarManager Name="BarManager">
       <dxr:RibbonControl Height="160" Name="RibbonControl" Width="Auto">
           <dxr:RibbonDefaultPageCategory>
           <dxr:RibbonPage Caption="Home" />
       </dxr:RibbonDefaultPageCategory>
   </dxr:RibbonControl>
 </dxb:BarManager>
</Grid>

And this is my Code behind:

public MenuBar()
{
  InitializeComponent();
  DevExpress.Xpf.Ribbon.ApplicationMenu applicationMenu = new DevExpress.Xpf.Ribbon.ApplicationMenu();
  applicationMenu.RightPane = new FrameworkElement();
  applicationMenu.RightPane.Width = 200;
  applicationMenu.RightPane.Height = 200;
  DevExpress.Xpf.Bars.BarItemLink item = new DevExpress.Xpf.Bars.BarItemLink();
  item.BarItemName = "Showing Item";

  applicationMenu.ItemLinks.Add(item);
  this.RibbonControl.ApplicationMenu = applicationMenu;
}

But I have a runtime error after clicking on ApplicationButton:
(Object reference not set to an instance of an object)
Wy? And What can I do for resolving this problem?

Posted 30-May-11 0:26am

mariazingzing

Updated 8-Feb-23 20:49pm

v2

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thatraja 30-May-11 14:09pm

In which line error occurs?

mariazingzing 31-May-11 0:42am

Not a specific line. I see this message in a new page. If you run these code you will see.
Thanks.

1 solution

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Andre Oosthuizen · Answer 1 · 2023-02-08T20:49:00

You need to declare one/some/all of the 13 RibbonControl Objects. Currently you have an instance of the object with no reference at all.

RibbonControl Class [^] shows you the methods. Also look at the left menubar with tons of more properties and classes.

As per above site, you will have something like this -

public class RibbonControl :
    Control,
    IRibbonControl,
    ILogicalChildrenContainer,
    IMergingSupport,
    IMultipleElementRegistratorSupport,
    IBarNameScopeSupport,
    IInputElement,
    IHierarchicalMergingSupport<RibbonControl>,
    IRuntimeCustomizationHost,
    IEventListenerClient,
    IKeyTipNavigationRoot,
    IKeyTipNavigationOwner,
    INavigationOwner,
    IBarsNavigationSupport,
    IBarsNavigationCompatibility,
    IMutableNavigationOwner,
    IMutableNavigationSupport,
    IThemedWindowSupport