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Editorial Team
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Asked: 2026-06-01T00:03:48+00:00

in a ASP.net C# application I have a Checkbox with a custom css. the

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in a ASP.net C# application

I have a Checkbox with a custom css.

the Css file is:

<link href="css/default.css" rel="stylesheet" type="text/css" />

the check box

<input id="boxcheck" runat="server" type="checkbox" checked="checked" class="customCheckbox" onclick="ChangeSett();"/>

Everything works correctly.

But when I put it inside an update panel. The style is lost when I do a partial postback.

Thanks for any help

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1 Answer

  1. Editorial Team

    I had similar problem.
    I solved it moving css <link .. from the <page> to the <header>.

    Since I use a MasterPage and I don’t want the link in all pages, I found useful putting a ContentPlaceHolder in the MasterPage’s Header

    <head id="Head1" runat="server">
  ...
  <asp:ContentPlaceHolder ID="HeaderContentPlaceHolder" runat="server"/>
</head>

    and then the link inside the desired page:

    <asp:Content ID="Content2" ContentPlaceHolderID="HeaderContentPlaceHolder"       Runat="Server">
    <link rel="stylesheet" type="text/css" href="CSS/my.css" />
</asp:Content>
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