asp.net – 使用主题的css文件需要在页面上的头控件 (例如)

我正在开发asp.net网站项目。当我运行项目时，它正常工作。但在服务器中，我收到以下错误。如何解决这个问题？

Using themed css files requires a header control on the page. (e.g. `<head 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. How to solve this problem?

Exception Details: system.invalidOperationException: Using themed css files requires a header control on the page. (e.g. `<head runat="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:
[InvalidOperationException: Using themed css files requires a header control on the page. (e.g. <head runat="server" />).]
   System.Web.UI.PageTheme.SetStyleSheet() +2458406
   System.Web.UI.Page.OnInit(EventArgs e) +8699420
   System.Web.UI.Control.InitRecursive(Control namingContainer) +333
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint,Boolean includeStagesAfterasyncPoint) +378

解决方法

对于我来说，因为我上传之前的 pre-compile个站点，所以在实时服务器上的原因是丢失了precompiledApp.config 文件。

asp.net – 使用主题的css文件需要在页面上的头控件 (例如)

解决方法

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