Hi
I am testing a new website with IE8 and Chrome 2.0 and noticed some strange behavior with Telerik TreeView. I'm using Telerik.Web.UI Version 2009.2.701.35. On this Website, I have 2 TreeViews which works great in FireFox without any problems, but if I open the Website in Internet Explorer 8.0 or Chrome 2.0 the left TreeView doesn't work. Screenshots:
Website in IE 8.0: http://bit.ly/cqvc6
Website in Chrome 2.0: http://bit.ly/6YkBU
Both Browsers are installed on Windows Vista SP2 with default Settings (I made no changes to the configuration after installation)
In IE 8.0 I receive many of the following JavaScript Errors:
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Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Timestamp: Tue, 21 Jul 2009 22:52:07 UTC
Message: 'this._element' is null or not an object
Line: 1931
Char: 1
Code: 0
URI: http://localhost:4500/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=RadScriptManager1_HiddenField&compress=1&_TSM_CombinedScripts_=%3b%3bSystem.Web.Extensions%2c+Version%3d3.5.0.0%2c+Culture%3dneutral%2c+PublicKeyToken%3d31bf3856ad364e35%3ade-CH%3a0d787d5c-3903-4814-ad72-296cea810318%3aea597d4b%3ab25378d2%3bTelerik.Web.UI%2c+Version%3d2009.2.701.35%2c+Culture%3dneutral%2c+PublicKeyToken%3d121fae78165ba3d4%3ade-CH%3a7e598a31-3beb-49a1-914c-5f530240f0ea%3a16e4e7cd%3af7645509%3a24ee1bba%3a1e771326%3ae524c98b%3ae330518b%3ac8618e41%3ae4f8f289%3aed16cbdc%3a874f8ea2%3a19620875%3a33108d14%3abd8f85e4
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Do you have any suggestions to fix this problem.
Thank you in advanced.
Beste regards
Mike Miller
13 Answers, 1 is accepted
We have not encountered such problem before. We need either a live url or a sample project which reproduces the JavaScript error. To send us a sample you need to open a support ticket.
Kind regards,
Albert
the Telerik team
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i do also face the same Problem, Can u let me know how did you fix it
Regards
Thomson
It seems that TreeView is not made for large trees. The described error occurs on my page when a TreeView has more than ~2700 objects.
It depends also:
1. how large the strings are you put into treeView.DataTextField and treeView.DataValueField
2. which browser you use (firefox is the only browser which can handle over 3000 objects)
Interesting: The object-limit is per TreeView, that mean you can have several TreeViews which all has under ~2700 objects that are working correctly on the same page.
@Telerik What's the max. limit of objects or how many nodes and how many items can you recommend to use with TreeViews?
About the problem with more than 2700 nodes:
- Please, post some code reproducing the problem.
About support for the Beta of IE 9:
- We do not support browsers in Beta stage of development. Here is a reference on browser support of RadControls for ASP.NET AJAX: http://www.telerik.com/products/aspnet-ajax/getting-started/browser-support.aspx
Hope that soon we will resolve the problem you experience!
Regards,
Nikolay Tsenkov
the Telerik team
Ticket-ID is: 364116
Thank you, we'll check the ticket.
Best wishes,
Yana
the Telerik team
I use 2010.2.713.40 with VS 2010.
Thanks,
Sherin George
Here is another example where it doesn't work in IE 8 (but in IE 9 and Chrome 14.0.835...):
http://www.lansstyrelsen.se/uppsala/Sv/om-lansstyrelsen/forfattningar/Pages/default.aspx
I observed your website and I noticed that you use not only Telerik controls on it and there is another jquery involved as well. Sometimes there may occur a conflict between different jquery. Would you please try to remove the other one and test again.
You can also consider Load the nodes on Demand as in the demo.
Regards,
Plamen Zdravkov
the Telerik team
I am also experiencing same issue, if number of nodes are > 3000. Did you find any solution for that?
Please let me know.
Thanks
Sudip
Would you please post some code that will reproduce the issue and clarify the browser version in which it can be observed?
All the best,
the Telerik team