Telerik RadGridView selected item binding not working when clicking on button in datagrid properly

Question

Hi I have a telerik RadGridView bound up to an observable collection via MVVM and the SelectedItem property of the grid is also bound to a property from within the model as well. There is then a button column that is bound to open the selected item to see more details of the selected item. The code for this is below.

           <telerik:RadGridView Name="RadGridView"
                         Height="900"
                         AutoGenerateColumns="False"
                         CanUserSortColumns="True"
                         IsReadOnly="True"
                         ItemsSource="{Binding Model.Items}"
                         SelectedItem="{Binding Model.SelectedItem,Mode=TwoWay}"
                         Width="990">
            <telerik:RadGridView.Columns>


                <telerik:GridViewColumn Header="Open Item" >
                    <telerik:GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <Button Content="Open"
                                Command="{Binding Path=DataContext.OpenItemBySelectedItemCommand,
                                RelativeSource= {RelativeSource FindAncestor,
                                AncestorType={x:Type telerik:RadGridView}}}">
                            </Button>
                        </DataTemplate>
                    </telerik:GridViewColumn.CellTemplate>
                </telerik:GridViewColumn>


                <telerik:GridViewDataColumn DataMemberBinding="{Binding DateScanned}" Header="Date Scanned"  />
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Amount}" Header="Amount"  />
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Description}" Header="Description"  />
                <telerik:GridViewDataColumn DataMemberBinding="{Binding IsRefund}" Header="Is Refund"  />

            </telerik:RadGridView.Columns>
        </telerik:RadGridView>

Now this code works fine whenever I click into the row then click the button, however if I just click the button of the row without clicking into the row first the SelectedItem property is not set and so the command does not function as expected.

I thought when clicking the button of a row it would auto select that row but apparently not. Does anyone know how I can get it to set the SelectedItem property whenever I only click on the button within a specific row without having to click on the row before clicking the button?

Answer 1

You could pass a reference to the underlying data object as a command parameter to the command:

<Button Content="Open"
        Command="{Binding Path=DataContext.OpenItemBySelectedItemCommand, RelativeSource= {RelativeSource FindAncestor, AncestorType={x:Type telerik:RadGridView}}}"
        CommandParameter="{Binding}">
</Button>

For the row to actually become selected when you click on the Button, you will have to write some code that actually selects it. You could do this by handling the Button's Click event like this:

private void Button_Click_1(object sender, RoutedEventArgs e)
{
    Button button = sender as Button;
    RadGridView.SelectedItem = button.DataContext;
}

---

<Button Content="Open"
        Click="Button_Click_1"
        Command="{Binding Path=DataContext.OpenItemBySelectedItemCommand,
        RelativeSource= {RelativeSource FindAncestor,
        AncestorType={x:Type telerik:RadGridView}}}">
</Button>

This does not break the MVVM pattern since selecting a row in the view is pure view functionality.