How to handle a double-click on a grid row in a MVVM application

Question Comments

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.)

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).

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 )

Our MVVM Framework consists from independent parts that can be used with any other third-party framework.