Last Updated: 18 Oct 2022 08:35 by Thomas
Created on: 18 Oct 2022 08:35
Category: Upload
Type: Bug Report
Incorrect Upload behaviour with validation and autoUpload:false

Bug report

Scenario 1: When you first select an invalid file and then a valid one, the upload button appears but does nothing.

Scenario 2: When you select a valid file and then an invalid one, if you hit the upload button, the widget will try to upload the invalid one and produce a server error.

Reproduction of the problem

Scenario 1

  1. Open this demo - https://demos.telerik.com/kendo-ui/upload/index
  2. Select a .PNG or another invalid file.
  3. Select a PDF ( or another valid file)

Scenario 2

  1. Open this Demo - https://demos.telerik.com/kendo-ui/upload/index
  2. Select a PDF ( or another valid file)
  3. Select a PNG ( or another invalid file)
  4. Press Upload button

Current behavior

Scenario 1
The Button appears but does nothing

Scenario 2
The widget attempts to Upload the invalid file and produces an error

Expected/desired behavior

Upload of invalid files shouldn't occur and no errors should be thrown;
A non-responding Upload button shouldn't appear.


  • Kendo UI version: 2022.3.913
  • Browser: [all]