XAML Binding RadComboBox SelectedValuePath to an attached property of a RadComboBoxItem

[gk]

In XAML, can you bindRadComboBox SelectedValuePath to an attached property of a  RadComboBoxItem?
I think this may be a WPF/SL limitation where the binding syntax for attached props "(local:LocalClass.SomeValue)" doesn't work, but I can't seem to find a definitive answer.
Anyone know for sure?
Thanks in advance, GK

[Konstantina]

Hi Gabe,

Since I assume you are asking for both - WPF and Silverlight, I will give you the solution for both:
WPF: You can bind the property without any problems, for example:

<telerik:RadComboBox IsEditable="True" SelectedValuePath="(telerik:TextSearch.Text)" >
                        <telerik:RadComboBoxItem Content="bb" telerik:TextSearch.Text="ii" />
                        <telerik:RadComboBoxItem Content="item 1" telerik:TextSearch.Text="i2" />
                        <telerik:RadComboBoxItem Content="item 2" telerik:TextSearch.Text="i3"/>
                        <telerik:RadComboBoxItem Content="item 3" telerik:TextSearch.Text="i4"/>
                </telerik:RadComboBox>

As for Silverlight you will need a work-around to make it work: bind the attached property to the Tag property and then the SelectedValuePath to the Tag, for example:

<telerik:RadComboBox IsEditable="True" VerticalAlignment="Center" SelectedValuePath="Tag"
                    SelectionChanged="RadComboBox_SelectionChanged_1">

                <telerik:RadComboBoxItem Content="bb" telerik:TextSearch.Text="ii"
                        Tag="{Binding (telerik:TextSearch.Text), RelativeSource={RelativeSource Self}}" />

                <telerik:RadComboBoxItem Content="item 1" telerik:TextSearch.Text="i2"
                        Tag="{Binding (telerik:TextSearch.Text), RelativeSource={RelativeSource Self}}" />

                <telerik:RadComboBoxItem Content="item 2" telerik:TextSearch.Text="i3"
                        Tag="{Binding (telerik:TextSearch.Text), RelativeSource={RelativeSource Self}}" />

                <telerik:RadComboBoxItem Content="item 3" telerik:TextSearch.Text="i4"
                        Tag="{Binding (telerik:TextSearch.Text), RelativeSource={RelativeSource Self}}" />

            </telerik:RadComboBox>

However, this seems like a not very good practise, so I would recommend you to data bind your RadComboBox and avoid binding to the attached property.

Greetings,
Konstantina
the Telerik team