Binding a RadGridView to a collection of enums

[Matt Greer]

I want a RadGridView which simply has a collection of enums as its ItemsSource. I have defined the grid as:

        <gridView:RadGridView x:Name="AssignedPermissionsGrid" AutoGenerateColumns="False" ShowInsertRow="False" ItemsSource="{Binding AssignedPermissions}">
            <gridView:RadGridView.Columns>
                <gridView:GridViewDataColumn Header="Assigned Permissions" />
            </gridView:RadGridView.Columns>
        </gridView:RadGridView>

In my code behind I have setup the DataContext of my UserControl to be my ViewModel, and then my ViewModel has a property named AssignedPermissions:

        public ICollection<Permissions> AssignedPermissions
        {
            get
            {
                return _assignedPermissions;
            }
            set
            {
                if (value != _assignedPermissions)
                {
                    _assignedPermissions = value;
                    RaisePropertyChanged("AssignedPermissions");
                }
            }
        }

Permissions is an enum with the [Flags] attribute.

This all works just fine, except the rows in the grid are empty. So if AssignedPermissions contains 5 elements, then I get five rows in the grid, but each row is blank.

How can I have the value in each row be equal to calling ToString() on the enum value? Or better yet, if I apply System.ComponentModel.DescriptionAttribute to each entry in the enum, how can I get that DescriptionAttribute value be displayed in the grid?

If I bind the grid to an ICollection<int> it displays the int values just fine.

I am using Silverlight 4, .NET 4, and my Telerik.Windows.Controls.GridView assembly is version 2010.1.422.1040

Thanks,

[Maya]

Hi Matt Greer,

You may try to define your grid definition as follows:

<telerik:RadGridView Name="positionsGrid" Grid.Row="1" AutoGenerateColumns="True"
              ItemsSource="{Binding AssignedPositions}">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn  DataMemberBinding="{Binding}">
                </telerik:GridViewDataColumn>
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>

I am sending you a sample project so that you can see and test the proposed solution. However, in the example, I created another way for using enum in the grid - as a Property a column is bound to.

I hope that helps.
 

Regards,
Maya
the Telerik team

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[Matt Greer]

Weird, that does work. I did try this approach and it didn't work for me, but I guess I didn't quite try it exactly as this and/or had something else set that was breaking it.

Thanks Maya!

[Matt Greer]

Also, in case other people have the same issue, the proper syntax to bind to the enum and use a ValueConverter is this:

DataMemberBinding="{Binding Converter={StaticResource EnumConverter}}"

Note the lack of a comma between Binding and Converter.