このページにはHtmlHead、追加中の CSS スタイルシートlink に必要なコントロールがありません。追加してください<head runat="server" />。私は与えましrunat="server"たが、問題はどのように解決されるかを解決しません。
私はprovidinfの後にこのエラーを受け取ります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