JumpList containing numeric entries

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  1. Richard
    Richard avatar
    8 posts
    Member since:
    Jun 2011

    Posted 02 Feb 2012 Link to this post


    Chasing down a bug with my implementation of JumpList and wondering if you can help. We've got a list of say 20 items, with the starting characters containing a selection of letters and numbers. The control correctly groups and sorts items as expected (I have a groups such as "6", "9", "a", "e" etc.)

    When I click on the group header to reveal the jump list, the entry for numbers ("#") is greyed out and I am unable to jump to any of the number-based groups. I suspect the logic for marrying numbers against "#" is not working in my code.

    My code is largely based on sample code from the documentation. I'm setting group descriptors, sortdescriptors and building the grouppickeritemssource (using string alphabet = "#abcdefghijklmnopqrstuvwxyz";).

    Any thoughts on what is going wrong? Is there an event fired on clicking a header (GroupHeaderItemTap)that perhaps I can trap any number presses and have them registered as alphabet "#" ?

  2. Deyan
    Deyan avatar
    2147 posts

    Posted 06 Feb 2012 Link to this post

    Hello Richard,

    Thanks for contacting us and for your questions.

    In general, when adding custom group picker items you take care whether they are going to be "grayed out" or not by providing a custom GroupPickerItemTemplateSelector. Also, you should handle the GroupPickerItemTap event and bring into view the corresponding group item according to the group picker selection.

    My suggestion for you is to take a look at our Demos solution, particularly at the JumpList's PhoneBook example. We have a source code available for your reference, that implements exactly the same scenario.

    I hope this helps.

    Let me know if you need further assistance here.

    All the best,
    the Telerik team
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  3. Romulus
    Romulus avatar
    1 posts
    Member since:
    Jul 2013

    Posted 29 Aug 2013 Link to this post

    Hello Richard,
    I had the same problem as you and I solved that changing the "GenericGroupDescription" from Jumb List from Demos solution to:

    // add the group and sort descriptors
    GenericGroupDescriptor<stringstring> groupByFirstName = new GenericGroupDescriptor<stringstring>(contact
        var firstLetter = contact.Substring(0, 1).ToLower();
        if (!alphabet.Contains(firstLetter))
             return "#";
             return contact.Substring(0, 1).ToLower();

    Now all the numbers entry are under "#" key.
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