RadComboBox and RadTextBox with custom Validation classes

[Kevin Y]

I have a WPF application that I am validating ComboBox and TextBox controls using custom Validation classes in XAML.
The following is my ComboBox and it is a required field.  I have not found any examples of similar code for validation using RadComboBox. 

<ComboBox Width="225" VerticalAlignment="Center" IsEditable="True" IsReadOnly="False">
   <ComboBox.ItemTemplate>
      <DataTemplate>
         <TextBlock Text="{Binding}" />
      </DataTemplate>
   </ComboBox.ItemTemplate>
   <ComboBox.Text>
      <Binding Path="Name" UpdateSourceTrigger="LostFocus"
               NotifyOnValidationError="True"
               NotifyOnSourceUpdated="True"
               NotifyOnTargetUpdated="True">
          <Binding.ValidationRules>
             <Validator:RequiredFieldRule FieldName="Field Name Prompt" />
          </Binding.ValidationRules>
       </Binding>
    </ComboBox.Text>
</ComboBox>
Here is my Window.Resources code to display the validation error message:
<Style TargetType="ComboBox">
    <Setter Property="VerticalAlignment" Value="Center" />
    <Style.Triggers>
        <Trigger Property="Validation.HasError" Value="true">
            <Setter Property="ToolTip"
                    Value="{Binding RelativeSource={x:Static RelativeSource.Self},
                            Path=(Validation.Errors).CurrentItem.ErrorContent}" />
RequiredFieldRule is a class in my application derived from ValidationRule.  
 
 


When I replace 'ComboBox' with ' RadComboBox' the Style used to set the ToolTip with the error message does not work.  
Any help would be greatly appreciated.

[George]

Hello Kevin,

Thank you for contacting us.

Could you please share with us which version of the our controls you are using, as we had such problem, but it is already fixed? Providing us with a sample application in which we can observe the issue will be very helpful in determining the source of the issue.

Looking forward to your reply. 

Regards,
George
the Telerik team

[Kevin Y]

The runtime version of RadControls for WPF we are using is v2.0.50727.
I will provide a sample as soon as possible.  Maybe the problem is already fixed as you mentioned.