Handler type not valid error with GridViewRow Selected event

5 posts, 0 answers
  1. David
    David avatar
    46 posts
    Member since:
    Nov 2008

    Posted 09 Aug 2013 Link to this post

    I'm getting "Handler type not valid" when I set the Selected event in the RowStyle.
    My XAML is:
      <Style TargetType="telerik:GridViewRow" >
         <EventSetter Event="Selected" Handler="pHandleItemSelected" />
    And my event handler is:
    Private Sub pHandleItemSelected(sender As System.Object, e As RoutedEventArgs)

    The documentation says that this is the type of handler. So what is the problem?

  2. David
    David avatar
    46 posts
    Member since:
    Nov 2008

    Posted 12 Aug 2013 Link to this post

    I have figured out that the problem is the event is defined as RoutedEventHandler but is actually RadRoutedEventHandler.
    I have reported this under Ticket 725826
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  4. Yoan
    Yoan avatar
    1051 posts

    Posted 13 Aug 2013 Link to this post

    Hi David,

    I have already answered your ticket containing the same question. 

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  5. Sebastien
    Sebastien avatar
    3 posts
    Member since:
    Apr 2014

    Posted 30 Jul 2015 in reply to Yoan Link to this post

    The link to ticket is now invalid! I would like to have the answer?
  6. Dimitrina
    Dimitrina avatar
    3769 posts

    Posted 31 Jul 2015 Link to this post


    The answer in the support ticket was:

    Indeed, you are absolutely right. Unfortunately, this can not be changed without introducing breaking changes. What you can try is to attach to the event like so:

    public MainWindow()
        AddHandler(GridViewRow.SelectedEvent, new RoutedEventHandler(row_Selected));
    void row_Selected(object sender, RoutedEventArgs e)

    Copy Cod

    Then, the answer from the client was:
    I did have to change my handler to get the row from e.OriginalSource instead of sender. Also, the event still is not raised until the row is loaded so I still need to keep my SelectionChanged handler where I call ScrollIntoView. But at least this eliminates the RowLoaded event and I can now go back to "Option Strict On".

    I hope this helps.

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