Strange error if I set the SelectionChanged event

[Pinho]

Hi telerik experts,

 I'm using the telelik combobox with the data bind to an ObservableCollection of a custom object.

 Basically, this combo is used to show an image with the flag and respective country code to allow the user to change the language of the application.

 So, I have got the following helpers:

 The cultureInfoItem class, that stores the infoID and the respective flag image

    public class CultureInfoItem : INotifyPropertyChanged, IEquatable<CultureInfoItem>
    {
        private string cultureInfoID;

        public string CultureInfoID
        {
            get { return cultureInfoID; }
            set
            {
                cultureInfoID = value;
                if (PropertyChanged != null)
                    PropertyChanged(this, new PropertyChangedEventArgs("CultureInfoID"));
            }
        }
        private string cultureInfoFlag;

        public string CultureInfoFlag
        {
            get { return cultureInfoFlag; }
            set
            {
                cultureInfoFlag = value;
                if (PropertyChanged != null)
                    PropertyChanged(this, new PropertyChangedEventArgs("CultureInfoFlag"));
            }
        }

        public CultureInfoItem(string cultureID)
        {
            CultureInfoID = cultureID;
            CultureInfoFlag = string.Format("/SilverlightStatusBarTesting;component/Images/Flags/{0}.png", cultureID);
        }
}

The combobox is binded to:

internal ObservableCollection<CultureInfoItem> cultureInfoCollection;

So, I add, remove, edit the items and the combo box is always updated. This works fine.

Then the xaml part, the combo box is defined in the following way:

        <telerikInput:RadComboBox x:Name="cmbCultureSelection" HorizontalAlignment="Center" VerticalAlignment="Center" Width="50" Height="22" Margin="2,2,2,2" Opacity="0.80" Grid.Row="1" Grid.Column="3">
            <telerikInput:RadComboBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <Image Source="{Binding Path=CultureInfoFlag}" Height="11" Margin="2,2,2,2"/>
                        <TextBlock Text="{Binding Path=CultureInfoID}" FontFamily="Verdana" FontSize="9" VerticalAlignment="Center" />
                    </StackPanel>
                </DataTemplate>
            </telerikInput:RadComboBox.ItemTemplate>
        </telerikInput:RadComboBox>

When I set the callback to take care of the SelectionChanged event, it doesn't even load the web page:

SelectionChanged="cmbCultureSelection_SelectionChanged"

Afterwards:

        <telerikInput:RadComboBox x:Name="cmbCultureSelection" HorizontalAlignment="Center" VerticalAlignment="Center" Width="50" Height="22" Margin="2,2,2,2" Opacity="0.80" Grid.Row="1" Grid.Column="3" SelectionChanged="cmbCultureSelection_SelectionChanged">
            <telerikInput:RadComboBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <Image Source="{Binding Path=CultureInfoFlag}" Height="11" Margin="2,2,2,2"/>
                        <TextBlock Text="{Binding Path=CultureInfoID}" FontFamily="Verdana" FontSize="9" VerticalAlignment="Center" />
                    </StackPanel>
                </DataTemplate>
            </telerikInput:RadComboBox.ItemTemplate>
        </telerikInput:RadComboBox>

Code-behind:

private void cmbCultureSelection_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangedEventArgs e)
{

}

Error:

Unhandled error in Silverlight 2 Application
AG_E_PARSER_BAD_PROPERTY_VALUE (Line:54 Position: 221)

The line and position points to SelectionChanged="cmbCultureSelection_SelectionChanged"

What am I doing wrong?

Thanks for all the help,

Luís Miguel Pinho

P.S.: I'm using version Q1 2009

[Pinho]

Sorry for replying to myself

I removed the combo box, created a new one with a diferent name but the same content and now, I don't get any error....

This is strange, but since it works, I would not waste time trying to figure out what went wrong...