Home / Community & Support / Developer Productivity Tools Forums / Silverlight > MaskedTextBox > Bind ICommand to InputBindings on RadMaskedTextBox

• Andy H

  Posted on Jun 28, 2011 (permalink)

  I have a Google-type search box (RadMaskedTextBox) in a Silverlight application and would like the search action to be triggered as soon as the user hits enter.

  I am using MVVM and have tried to achieve this behaviour as follows:

  XAML:
  

  <telerik:RadMaskedTextBox Value="{Binding SearchString, Mode=TwoWay}"

                    EmptyContent="Search (min. 3 characters)">

      <telerik:CommandManager.InputBindings>

          <telerik:KeyBinding Command="{Binding SearchCommand}" Key="Enter" />

      </telerik:CommandManager.InputBindings>

  </telerik:RadMaskedTextBox>

  <telerik:RadButton Command="{Binding Path=SearchCommand}"

               Content="Search"/>

  
  C#:
  

  private ICommand _searchCommand;

  public ICommand SearchCommand

  {

      get

      {

          if (_searchCommand == null)

          {

              _searchCommand = new DelegateCommand<object>(OnSearchCommand);

          }

          return (_searchCommand);

      }

  }

  
  When the app runs, I get this error message:
  

  Object of type 'System.Windows.Data.Binding' cannot be converted to type 'System.Windows.Input.ICommand'.

  
  Any ideas?
  
  

  Reply

• Petar Mladenov Petar Mladenov

  Posted on Jul 1, 2011 (permalink)

  Hi Andy H,
  
  The problem here is that KeyBinding.Command is not a dependency property, so it does not support data binding. Feel free to ask if you need further assistance.
  
  
  Kind regards,
  Petar Mladenov
  the Telerik team

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• Shane

  Posted on Oct 3, 2011 (permalink)

  was there ever a solution provided for this? Having the same exact same issue.

  Reply

• Alex Fidanov Alex Fidanov

  Posted on Oct 6, 2011 (permalink)

  Hello Shane,
  
  The Command property of the InputBinding uses a TypeConverter to find the type of the binding. For this, you need to use the following syntax :
  
  

  <telerik:RadMaskedTextBox>

       <telerik:CommandManager.InputBindings>

           <telerik:InputBindingCollection>

               <telerik:KeyBinding Command="local:MyCommands.MyCommand" Key="Enter"/>

           </telerik:InputBindingCollection>

       </telerik:CommandManager.InputBindings>

   </telerik:RadMaskedTextBox>

  The MyCommand command is declared in a static class MyCommands as follows:
  
  

  public static class MyCommands

  {

      public static RoutedUICommand MyCommand { get; private set; }

   

      static MyCommands()

      {

          MyCommand = new RoutedUICommand("description", "MyCommand", typeof(MyCommands));

      }

  }

  And finally, you can register bindings to that command :
  
  

  CommandBinding b = new CommandBinding(MyCommands.MyCommand, CommandBinding_Executed, CommandBinding_CanExecute);

  CommandManager.RegisterClassCommandBinding(typeof(MainPage), b);

  
  
  Greetings,
  Alex Fidanov
  the Telerik team

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  Reply

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