如果您使用的是.net 4.0 / 4.5，请检查您是否添加了AjaxTookitScriptManager（而不是ScriptManager通常添加在.net 2.0中）。我遇到了同样的问题，并从这个中找到了答案。备注

If you are using .net 4.0/4.5, check that you have added AjaxTookitScriptManager (and not ScriptManager usually added in .net 2.0). I ran into the same problem and figured that out from this notes

。您试试这个网站

我的标签容器似乎没有任何问题。相同的代码对我有用。确保您可以访问ajax工具包。



请参见此处 [ ^ ]样本，但它类似于你的html。

I don't seem anything wrong with your tab container. The same code has worked for me. Make sure you could access the ajax tool kit.

See here[^] for a sample but it is similar to your html.