Validation Combobox

[Nicky]

I have a combobox like below and i need to have a required field validation on it. 
<telerik:RadComboBox x:Name="combobox" SelectionChanged="combobox_SelectionChanged" IsTextSearchEnabled="True" Width="120"

                                                telerik:TextSearch.TextPath="Kode" Margin="2,0,0,0" IsEditable="True" IsReadOnly="True" SelectedItem="{Binding Path=SelectedItem, Mode=TwoWay, UpdateSourceTrigger=Explicit, NotifyOnValidationError=true, ValidatesOnExceptions=true}" TextSearchMode="Contains" CanAutocompleteSelectItems="True"  >

                                <ItemsControl.ItemTemplate>

                                    <DataTemplate>

                                        <Grid>

                                            <Grid.ColumnDefinitions>

                                                <ColumnDefinition Width="50" />

                                                <ColumnDefinition Width="300"/>

                                                <ColumnDefinition Width="300"/>

 

                                            </Grid.ColumnDefinitions>

                                            <TextBlock Text="{Binding Kode}" Grid.Column="0"/>

                                            <TextBlock Text="{Binding Nederlandse_omschrijving}" Grid.Column="1"/>

                                            <TextBlock Text="{Binding Franse_omschrijving}" Grid.Column="2"/>

                                        </Grid>

                                    </DataTemplate>

                                </ItemsControl.ItemTemplate>

DummyComboBox.ItemsSource = DummyCodeList.Load()
The load event returns a list of Objects (List<DummyObject>)
I can't quite get the validation working. 
Any suggestions ?

[George]

Hi Nicky,

 
Please, refer to the following forum thread - http://www.telerik.com/community/forums/wpf/combobox/radcombobox-validation.aspx

I hope this helps.

Kind regards,
George
the Telerik team

[VEJitendra]

Hi ,

I have a telerik combo-box control . And i want to have validation-on that control . 

And Validation should be for below condition.

1:  Whenever  a user enter a new value in combobox it check that same value exist or not.

2: If user enter special character in combobobx.

 

So please help me to validate the combobox control in above condition.