Re: set selected item of combobox in dataform control

11-05-2009 10:27 PM |

 

 <UserControl.Resources>
     <my:ComBoValue x:Key="combovalue" />
 </UserControl.Resources>

 Hi,

   When you set the combox's selectedItem , it will look for the item you set in it's itemsCollection if it's not found then it will still be null.  And you add your combox's item in xaml so the itemCollection's type will naturally be typeof ComboxItem(If you use the c#  way then the ItemsCollection's type will be your itemsSource's type).  But here your Type Field's type is string.  They can't be matched.

  Here is how i archieved your requirement.

 <UserControl.Resources>
        <my:ComBoValue x:Key="combovalue" />   // ComboValue is a class which contains a string[] Property
  </UserControl.Resources>

<dataFormToolkit:DataForm x:Name="df">
       <dataFormToolkit:DataForm.ReadOnlyTemplate>
             <DataTemplate>
                 <StackPanel>            
                     <ComboBox x:Name="cb" ItemsSource="{Binding MyValue,Source={StaticResource combovalue}}" SelectedItem="{Binding Type}"></ComboBox>
                 </StackPanel>
             </DataTemplate>
      </dataFormToolkit:DataForm.ReadOnlyTemplate>
</dataFormToolkit:DataForm>

Best Regards