Select Null Value for Combo

[Nick Wood]

Hi There

We basically require that the user can select a value in the combo that sets the bound value to null, ie "Nothing Set"

From some reading I have found that the ClearSelectionButtonVisibility property should be able to do this yet with the code below, there is no difference to the drop down items.

<telerikInput:RadComboBox Width="200" HorizontalAlignment="Left" VerticalAlignment="Center"
                ClearSelectionButtonVisibility="Visible" ClearSelectionButtonContent="Nothing Set"
                Margin="3" SelectedValuePath="contact_id" DisplayMemberPath="FullName" ItemsSource="{Binding AllCustomerContacts}"
                SelectedValue="{Binding contact_id, Mode=TwoWay, ValidatesOnExceptions=True,
                ValidatesOnDataErrors=True, NotifyOnValidationError=True}" />


Please Help.

Nick

[Konstantina]

Hi Nick,

Thank you for contacting us.

I have made a sample project in which I used the ClearSelectionButton to clear the value and it works fine. Attached I am sending it to you. Please feel free to modify it in order to reproduce the issue and send it back to us.

Looking forward to your reply.

Kind regards,
Konstantina
the Telerik team

[Nick Wood]

Thanks for your help

After looking at your code I realised that you had no styles which quickly pointed me to my style/template as the issue. when i remove the style, I could see the null button in the dropdown.

Thanks very much for you help

Nick