This example demonstrates one of many possible solutions for decoupling DXGrid mouse event handling from business logic, when using the MVVM architectural pattern.
Question Comments
Added By:
Gert Hauan at:
1/26/2015 2:08:55 AM Hi
I am trying to get this to work, but without success. The reason is possibly the way that MVVM is implemented in the application I am working on. It is different from the way you have done it.
If I understand your code correctly, you have one viewmodel object pr row in the datagrid. In the application I am working on, there is one viewmodel for the whole view, that is the viewmodel is the datacontext of the view. Then the ItemsSource of the datagridcontrol is bound against a collection in the viewmodel.
Basicly what I would like to do is this: Today there is a button under the gridcontrol called "Open". This button is bound to a command in the viewmodel that opens a new (PRISM)view based on the FocusedRow. I need that same command to fire when a row is doubleclicked. Could you help me along the way here?
(It is difficult to post an example project due to the size of the app.)
Added By:
Alexander (DevExpress Support) at:
1/26/2015 8:26:33 AM Hi Gert,
This is old example. Now, we have the MVVM Framework that allows doing such things with ease. I suggest you use the EventToCommand with an EventArgsConverter in the following manner:
[XAML]
<dxg:GridControlName="gridControl"...><dxmvvm:Interaction.Behaviors><dxmvvm:EventToCommandPassEventArgsToCommand="True"Command="{Binding EditCommand}"EventName="MouseDoubleClick"><dxmvvm:EventToCommand.EventArgsConverter><dx:EventArgsToDataRowConverter/></dxmvvm:EventToCommand.EventArgsConverter></dxmvvm:EventToCommand></dxmvvm:Interaction.Behaviors>
...</dxg:GridControl>
You can see how this code operates in the How to build a fully-functional and well-organized MVVM application in a few clicks with DevExpress components (Visual Studio 2012+) example (file - EmployeeCollectionView.xaml).
Added By:
Gert Hauan at:
1/27/2015 12:59:56 AM Hi
Do you know if I may use this functionality from your MVVM Framework in conjunction with the PRISM framework?
(FYI: I was able to get the double-click to work by using this approach: https://www.devexpress.com/Support/Center/Question/Details/Q534762 )
Added By:
Alexander (DevExpress Support) at:
1/27/2015 1:30:09 AM Our MVVM Framework consists from independent parts that can be used with any other third-party framework.
Added By:
Roland Harrison at:
2/27/2017 2:59:34 AM Would be good to update these to use the new POCOViewModel