I am able to bind Prism commands directly from the Ribbon control. I'm using 10.1 version.

< 

}" />

.UndoButtonEnablement}" />

}" />

Even though we are using MVVM, the commands go in the xaml.cs and call methods in the ViewModel.  In the case above however we are raising a Prism aggregate event which all modules subscribe to.  I'll just show one of the command implemenations below.

#region

Save Command

DelegateCommand<bool> _SaveCommand;

public DelegateCommand<bool> SaveCommand

{

get

if (_SaveCommand == null)

_SaveCommand =

new DelegateCommand<bool>(Save, CanSave);

return _SaveCommand;

}

}

public bool CanSave(bool param)

{

return CommonContext.objRibbonInstance.SaveButtonEnablement;

}

public void Save(bool param)

{

//get the active view

string strActiveView = GetActiveRegionName();

if (strActiveView.Length > 0)

{

//send the save event using the view tag as the payload

SaveViewDataRequestEvent>().Publish(strActiveView);

}

}

// Save Command

lordrob said:

Hi Georgi

Thanks for the quick response and solution.

re: the Prism Commanding - I'll be interested to see what you make of this. I'm using Prism in both my SL and WPF apps and the commanding is simple and effective to use.

Kr

George

 

I gave it a quick try - attached is a sample of what I was able to do. Basically, two issues came up:

Issue #1 is that Ribbon's tools are not derived from Control, so you'll have to create your own CommandBehaviorBase<T> class and derive your commands from it.

Issue #2 is that Ribbon's tools are not derived from FrameworkElement so they do not support binding. So you can't just bind your attached properties (commands) in XAML. In the attached sample I set the command on the ButtonTool in code-behind, which is kinda against MVVM rules.

This second issue should be resolved with SL4 which introduces the ability to bind properties on DependencyObjects and not just on FrameworkElements. 

Hope that helps,

Hi Georgi

Thanks for the quick response and solution.

re: the Prism Commanding - I'll be interested to see what you make of this. I'm using Prism in both my SL and WPF apps and the commanding is simple and effective to use.

Kr

George

Hi Robin,

You're right, it's not working with minimized Ribbon. I guess that's because when the Ribbon is minimized the ButtonTool is placed inside a Popup, which actually breaks the Visual Tree and the UserControl is not checked if it's a valid CommandTarget. We'll have to take a deeper look into that.

A better approach here would be to make the Ribbon a Command Target for your command.

Just create a new class that derives from XamWebRibbon and override SupportsCommand method, returning true for your custom commands. Attached is the modified sample that shows this.

@Brian: I didn't try Prism Commanding capabilities, I'll do so as soon as possible.

Hope that helps,

Hi Georgi

The sample fails if you change the ribbon to minimized.

<ig:XamWebRibbon x:Name="_Ribbon" IsMinimized="True">

The command never gets actioned.

Kr

Robin