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Qiuyu Wang
175
Getting Error "Microsoft JScript runtime error: 'Sys' is undefined" after selection changed in dropdown
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Hi,

I am using Infragistics v12.2 with .Net 4.0. I have a webdatagrid in the form and one of the column is using DropDownProvider. When the page loads, if I make a selection in the dropdown, I get the error "Microsoft JScript runtime error: 'Sys' is undefined". I have a linkbutton on the same page, if I click on the linkbutton, it does a postback, after the postback, I can change the selection on the dropdown without any error. 

I do have the httpHandlers in my web.config.

Any help will be appreciated!

Qiuyu

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  • 17590
    Offline posted

    Hello Qiuyu Wang,

    Thank you for posting in the community.

    A possible reason for this error may be if in your code you have any <script> blocks before your ScriptManager (for example in the <head> block ). Some further reference could be found at:

    http://stackoverflow.com/questions/1931701/microsoft-jscript-runtime-error-sys-is-undefined

    Could you please provide me some extra issue information in order to investiigate this issue further. Do you have you DropDown provider`s AutoPostBackFlag set to true, which version of NetAdvantage are you using? Also an isolated sample would be highly appreciated and would be helpful for faster response.

    Looking forward to hearing from you.

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