Combobox virtualization

3 posts, 0 answers
  1. Mahmut
    Mahmut avatar
    21 posts
    Member since:
    Nov 2010

    Posted 27 Feb 2016 Link to this post


    I'm experiencing a problem with valuemapper:

    var ds = {   pageSize: 20, 

                      transport: {

                                 read: function (options) {


                                virtual: {
                                    itemHeight: 26,
                                    valueMapper: function(options) {
                                        options.success([options.value || 0]);// "Cannot read property '...' of undefined" error at this line
                                height: 200,
                                dataSource: ds

    I can't find any local data virtualization sample with Guid primary key.

    Any recommendation?

    Thank you very much.



  2. Mahmut
    Mahmut avatar
    21 posts
    Member since:
    Nov 2010

    Posted 29 Feb 2016 Link to this post

    Sorry for inadequate information,
    This problem occurs when I use the valuemapper in a kendo-grid cell editor.
    (2015 Q3 version)
  3. Kiril Nikolov
    Kiril Nikolov avatar
    2598 posts

    Posted 02 Mar 2016 Link to this post

    Hello Mahmut,

    The valueMapper is a function that should return the indexes of the items that were requested by the widget, but not available in the dataSource. In your case you are returning. In your case you need to provide the valid IDs in the response which I don't believe is the case. Please check the following documentation that would help you:

    Kiril Nikolov
    Join us on our journey to create the world's most complete HTML 5 UI Framework - download Kendo UI now!
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