Question

I’m binding my viewmodel and view using resource dictionary as follows

<DataTemplate DataType="{x:Type viewmodels:MyViewModel}">
    <Views:MyView />
</DataTemplate>

in MyView, i have dataGrid x:Name=”BoxDataGrid” with DataGrid.RowDetailsTemplate having other dataGrid x:Name=”SpoolsDataGrid”

how to access MyView or datagrids above using code behind in MyViewModel ?

The reason is,i want to load and show contents inside RowDetailsTemplate only when main datagrid row selected (clicked) thru event “RowDetailsVisibilityChanged”.

Thanks.

Correction:
My bad. I want to access MyView not MyViewModel

Answer 1

Just solved this problem using MVVM Light Toolkit – EventToCommand. Other better suggestions are very much welcome.

http://blog.galasoft.ch/archive/2009/11/05/mvvm-light-toolkit-v3-alpha-2-eventtocommand-behavior.aspx

Hope this solution will be useful to others.
don’t need to know the view, in my datagrid view

  <i:Interaction.Triggers>
      <i:EventTrigger EventName="RowDetailsVisibilityChanged">
         <cmd:EventToCommand Command="{Binding RowDetailsVisibilityChangedCommand}" PassEventArgsToCommand="True" />
      </i:EventTrigger>
  </i:Interaction.Triggers>

and in viewmodel

    public RelayCommand<DataGridRowDetailsEventArgs> RowDetailsVisibilityChangedCommand
    {
        get;
        private set;
    }

and in viewmodel constructor

 RowDetailsVisibilityChangedCommand = new RelayCommand<DataGridRowDetailsEventArgs>(e =>
{
   DataGrid SpoolsDataGrid = e.DetailsElement as DataGrid;
   DataRowView drv = (DataRowView)e.Row.Item;
   serialNo = drv.Row["BOX_SERIAL"].ToString();
   SpoolsDataGrid.ItemsSource = as400Service.GetSPOOL_BY_SERIAL_NO(serialNo);
 });