[Solved] Using default values with WCF-RIA entities binding

[m v klingeren]

We're using a DomainService for our Silverlight business application, and bind the respective Itemsource of our
datagrids to the <riaControls:DomainDataSource> queries or trough LoadOperation for the DomainContext. That works fine..

Now in the datagrid, we define our collumns (autogeneratecolumns = false). And use DataBinding to bind to the right part of the entities
(In this example i just left 1 column, we have more of course..)

 <grid:RadGridView.Columns>
                <grid:GridViewDataColumn Header="Begindatum" DisplayIndex="2" DataMemberBinding="{Binding BeginDate, Mode=TwoWay}" DataFormatString="{}{0:d}" />
 </grid:RadGridView.Columns>

Now when a new item is added trough the 'ShowInsertRow' bar.. we would like to change the default value of it. So the date will be 01-01-2000, for example instead of 01-01-0001

in case of binding with a ComboboxColumn

<grid:GridViewComboBoxColumn DisplayIndex="2" Header="Part" ItemsSource="{Binding Data, Source={StaticResource ddsParts},Mode=TwoWay}" DataMemberBinding="{Binding Mode=TwoWay, Path=Part_PartID, NotifyOnValidationError=True}" DisplayMemberPath="Omschrijving" SelectedValueMemberPath="PartID" />   

We would also like to be able to make a predefined selection.

Can you please help us with this?


Kind regards,
Milco              

[Veselin Vasilev]

Hi m v klingeren,

You can subscribe to the AddingNewDataItem event of RadGridView and set the properties you need of the object that is about to be added. This way the combobox item will be pre-selected as well:

private void clubsGrid_AddingNewDataItem(object sender, GridViewAddingNewEventArgs e)
{
    e.NewObject = new Club()
    {
        Established = new DateTime(2010, 10, 10),
        Name = "Chelsea" // this will preselect the combobox
    };
}

Greetings,
Veselin Vasilev
the Telerik team