Hi,
I am testing the RADSpreadsheet control and have the following error when the page loads:
Unhandled Exception - Unable to get property '_preInitialize' of undefined null reference
Telerik.Web.UI.RadListBox._preInitialize("RadSpreadsheet1_FilterMenu_ValueListBox","0")
I have the latest version of the UI for ASP.NET AJAX 2016.3.1027
Developing using VS 2015 Framework 4.5.2
Thanks.
8 Answers, 1 is accepted
Rank 1
HI:
I have the same problem.
How can I do?
I tested the Spreadsheet with the specified version, however I wasn't able to observe the same issue. Could you share the markup you are using, or open a support ticket where you can attach a sample project, so that I can reproduce the issue on my end?
Regards,
Bozhidar
Telerik by Progress
Rank 1
HI:
I have the same problem.
How can I do?
Graphic file attachment
Rank 1
Unhandled exception at line 542, column 1 in http://localhost:61583/Test.aspx
0x800a138f - JavaScript runtime error: Unable to get property '_preInitialize' of undefined or null reference
This error appears only on my computer.
I run the same project on another computer and this error does NOT appear.
If the issue is only reproduced on your computer, try clearing the browser cache, and check the network tab for eny errors. If that doesn't help, you have to provide a sample page that we can inspect, in order to determine if everything is set up as expected.
Regards,
Bozhidar
Telerik by Progress
Rank 1
We still haven't received any further input from the client in order to troubleshoot the problem, so it has not yet been resolved. If you could provide us a sample project, I would ask you to open a support ticket and attach it there, so that we can take a look and investigate the issue.
Regards,
Bozhidar
Progress Telerik
Rank 1