Home / Community & Support / Developer Productivity Tools Forums / Silverlight > NumericUpDown > How to get the length of selected numbers?

• Kevin

  Posted on Dec 3, 2009 (permalink)

  I need a way to find out what is the selected length when user highlights number in NumericUpDown control.
  

  Reply

• Valeri Hristov Valeri Hristov

  Posted on Dec 4, 2009 (permalink)

  Hello Kevin,
  
  Unfortunately RadNumericUpDown does not provide a way to get/set the selection of its internal TextBox. You could try the following code:
  var textBox = RadNumericUpDown1.ChildrenOfType<TextBox>().FirstOrDefault();
  if (textBox != null)
  {
      // manupulate the selection here
  }
  
  but I strongly recommend using it only for testing purposes, since it might add performance penalty on your application.
  
  I will add this request to the product backlog and we will consider it for its future development.
  
  All the best,
  Valeri Hristov
  the Telerik team

  
  Instantly find answers to your questions on the new Telerik Support Portal.
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• Kevin

  Posted on Dec 7, 2009 (permalink)

  Hello,
  
        I tried your sample code, but it always return the null. So I couldn't get the internal reference to TextBox.
  
      Thanks!
  
  -Kevin

  Reply

• Answer Valeri Hristov Valeri Hristov

  Posted on Dec 8, 2009 (permalink)

  Hi Kevin,
  
  I suppose that you are trying to call my code too early, e.g. in a Loaded event or the page constructor - at this time the template of RadNumericUpDown is not applied yet and the TextBox is not created, hence the method returns an empty array. You could try the following:
  public partial class MainPage : UserControl
  {
      public MainPage()
      {
          InitializeComponent();
  
          this.RadNumericUpDown1.ApplyTemplate();
          var length = this.RadNumericUpDown1.ChildrenOfType<TextBox>()[0].SelectionLength;
      }
  }
  
  Regards,
  Valeri Hristov
  the Telerik team

  
  Instantly find answers to your questions on the new Telerik Support Portal.
  Watch a video on how to optimize your support resource searches and check out more tips on the blogs.

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• Gabe

  Posted on Apr 19, 2011 (permalink)

  IS there any update on this. I would like to have a better way to get the SelectedText for the NumericUpDown control.

  Reply

• Valeri Hristov Valeri Hristov

  Posted on Apr 20, 2011 (permalink)

  Hello Gabe,
  
  This functionality has not changed and I still cannot set a specific delivery date for this feature.
  
  Kind regards,
  Valeri Hristov
  the Telerik team

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Home / Community & Support / Developer Productivity Tools Forums / Silverlight > NumericUpDown > How to get the length of selected numbers?