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Editorial Team
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Asked: 2026-05-14T16:30:18+00:00

I having an issue with the ASP.NET Treeview control. I create the treeview just

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I having an issue with the ASP.NET Treeview control. I create the treeview just fine but the nodes will not expand or collapse. I see there is a javascript error but it is for line 1 character 0 of the webpage, there is nothing at line 1 character 0.

I am using the ASP:Treeview control in conjunction with the Telerik controls, but I’m not sure if that is an issue.

I saw there was a similar question here but the answer is not pertinent to my site. Has anyone run into this issue before? I’ve tried searching Google and tried a number of proposed solutions but so far none have worked.

Thank you,

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1 Answer

  1. Editorial Team

    Normally with problems like this it is best to isolate the code which is causing the problem. For example, create a minimal page with no other controls or external JavaScript and see if the problem persists.

    It’s also useful to use a decent debugger. The latest IE8 actually has a very good Visual Studio-style JavaScript debugger built in – go to your page, hit F12 and the go to the Script tab and click ‘Start Debugging’ and see where that leads you.

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