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Using themed css files requires a header control on the page. (e.g. <head runat=“server” />)

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[愿得一人]
[愿得一人] 2021-02-12 15:41

I\'m working on asp.net web project. When I run the project, It works correctly. But In server, I got the following error. How to solve this problem?

Using theme
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7条回答
  • 执念已碎
    2021-02-12 15:58

    Be sure to have just the files you need in the bin folder. If you have other dlls (old versions of actual dlls varying just by their name) strange-things-may-happen.

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  • 梦毁少年i
    2021-02-12 16:04

    you need a head tag with runat="server" in the page (or master page) as below

    <head runat="server">
    <title></title>
</head>
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  • 清酒与你
    2021-02-12 16:08

    I feel none of the answers made above can resolve the actual issue faced by user if the page is not meant to render html. In this case, the solution is - just paste following 

    EnableTheming = "False" StylesheetTheme="" Theme=""

    in the @Page attribute of that page.

    For example, the following source code sample:

    DownloadFile.aspx.

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DownloadFile.aspx.cs"
    Inherits="WebUI.Monitorization.DownloadFile"  EnableTheming="False" StylesheetTheme="" Theme=""   %>
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  • 夕颜
    2021-02-12 16:11

    I got this error as a result of a really bad copy and paste error in Visual Studio 2008. I'd replaced the page with some code scraps I had meant to email to a friend.

    Despite killing all the contents of the aspx page, it threw no other errors.

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  • 独厮守ぢ
    2021-02-12 16:18

    For me the cause was missing the PrecompiledApp.config file on the live server since I pre-compile sites before uploading.

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  • 半阙折子戏
    2021-02-12 16:20

    I have tried all the suggested things with out finding a solution.

    I am just needing a dummy page placeholder for calling LoadControl with a UserControl. I tried setting Theme and StyleSheetTheme multiple places because System.Web.UI.Page has this OnInit method:

    protected internal override void OnInit(EventArgs e) { 
    base.OnInit(e);

    if (_theme != null) { 
        _theme.SetStyleSheet();
    } 

    if (_styleSheet != null) {
        _styleSheet.SetStyleSheet();
    } 
}

    I tried setting the values in OnPreInit and OnInit but that resulted in exceptions saying that I is not allowed to set those properties there. So I tried this code and found that I Theme and StyleSheetTheme where set in OnInit but not OnPreInit:

    public BaseRenderingPage()
{
    EnableTheming = false;
    Theme = null;
    StyleSheetTheme = null;
}

protected override void OnPreInit(EventArgs e)
{
    if (EnableTheming || Theme != null || StyleSheetTheme != null)
        throw new Exception("OnPreInit: " + EnableTheming + ", " + Theme + ", " + StyleSheetTheme);
    base.OnPreInit(e);
}   

protected override void OnInit(EventArgs e)
{
    if (EnableTheming || Theme != null || StyleSheetTheme != null)
        throw new Exception("OnInit: " + EnableTheming + ", " + Theme + ", " + StyleSheetTheme);
    base.OnInit(e);
}

    I ended solving it with this hack:

    public override string Theme
{
    get { return null; }
    set { base.Theme = null; }
}

public override string StyleSheetTheme
{
    get { return null; }
    set { base.StyleSheetTheme = null; }
}
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