Home / Community & Support / Developer Productivity Tools Forums / WPF > Rating > binding in rating?

• sivakanth

  Posted on Mar 1, 2011 (permalink)

  Hello Telerik Team,
  
  I have small doubt in wpf rating,
       How to bind rad rating? Bcoz i want to store the rated value in database.
  our telerik version is 2010_2_0723_DEV.
  
  

  Reply

• Petar Mladenov Petar Mladenov

  Posted on Mar 3, 2011 (permalink)

  Hello sivakanth,
  
  Binding the value of RadRating could be achieved by using a ViewModel like so:
  

  <telerik:RadRating Width="120" Height="40" Value="{Binding RatingValue}" x:Name="ratingControl"/>

  class RatingViewModel

      {

          public double RatingValue

          {

              get;

              set;

          }

      }

  public MainWindow()

        {

            InitializeComponent();

            this.ratingControl.DataContext = new RatingViewModel() { RatingValue = 4.5 };

        }

  Please let us know if this fits in your scenario.
  
  Greetings,
  Petar Mladenov
  the Telerik team

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  Reply


• Dan

  Posted on Apr 3, 2012 (permalink)

  This example is not working. the value is read from the binding, however the value is not set back to the binding. 
  
  This is my workaround
  
  

      Private Sub RadRating1_ValueChanged(sender As Object, e As System.Windows.RoutedPropertyChangedEventArgs(Of Double?)) Handles RadRating1.ValueChanged
          CType(DataContext, MyObject).Rating = RadRating1.Value
      End Sub

  
  
  Version: 2012.1.215.40

  Reply

• Tina Stancheva Tina Stancheva

  Posted on Apr 4, 2012 (permalink)

  Hello Dan,
  
  You don't have to handle the ValueChanged event. Instead you can set the binding mode of the Value property to TwoWay:
  

  <telerik:RadRating Value="{Binding Rating, Mode=TwoWay}" />

  
  I attached a sample project demonstrating this approach. Please give it a try and let us know if it helps.
  
  Kind regards,
  Tina Stancheva
  the Telerik team

  Sharpen your .NET Ninja skills! Attend Q1 webinar week and get a chance to win a license! Book your seat now >>

  Attached files

  • RatingSample.zip

  Reply

• Dan

  Posted on Apr 4, 2012 (permalink)

  Thank you Tina for your response.  Your suggestion works, however, Telerik should change this to the default behavior. It's more reasonable to assume 2 way binding on every control until otherwise set that way.
  
  Thanks again for your help.

  Reply

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