Grid - sorting after updating the dataSource shows old data again

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Last Updated: 10 Feb 2026 09:40 by Michael D

Michael D

Created on: 23 Apr 2024 05:51

Category: Grid

Type: Bug Report

Grid - sorting after updating the dataSource shows old data again

Consider the following scenario: There is a sortable Kendo-UI grid with a corresponding dataSource. Initially, the dataSource contains some items. When updating the dataSource to an empty array, all items disappear from the grid - so far, so good. However, if a column header is clicked afterwards to sort that column, the removed data reappears again.

We created a small "walkthrough" in this DOJO to demonstrate the issue.

FYI: The issue can be avoided by using a custom implementation of dataSource.transport.read which always returns the latest data.

2 comments

Michael D

Posted on: 10 Feb 2026 09:40

Hi!

While your solution works, dataSource.transport is an undocumented field which is also missing in the Typescript type definitions This is a hacky workaround at best, but does not seem like the appropriate way of updating a dataSource's data.

Please reconsider.

ADMIN

Peter Milchev

Posted on: 29 Apr 2024 09:40

Hello Michael,

To ensure the locally bound data source does not restore the original data, you can set the transport.data to an empty array:

https://dojo.telerik.com/@pmilchev/UVEPaxID

  // clear the data
  dataSource.data([])
  dataSource.transport.data = [];

Regards,
Peter Milchev
Progress Telerik

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