此页面缺少HtmlHead正在添加的 CSS 样式表链接所需的控件。请添加<head runat="server" />. 我已经给出了runat="server"但问题没有解决什么是问题如何解决。
providinf 后出现此错误runat=server
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NotSupportedException: This page is missing a HtmlHead control which is required for the CSS stylesheet link that is being added. Please add "server">.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[NotSupportedException: This page is missing a HtmlHead control which is required for the CSS stylesheet link that is being added. Please add "server">.]
AjaxControlToolkit.ScriptObjectBuilder.RegisterCssReferences(Control control) +249
AjaxControlToolkit.ExtenderControlBase.OnPreRender(EventArgs e) +135
System.Web.UI.Control.PreRenderRecursiveInternal() +77