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Editorial Team
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Asked: 2026-06-06T14:24:51+00:00

I want to divide my styles and scripts according to user-agent(mobile , ie ,

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I want to divide my styles and scripts according to user-agent(mobile , ie , chrome-ff).How can control and allow include or not ?

maybe for ie i can use < !–[if IE] > , but how about others ?
Somebody advice me plz , thx

 <head runat="server" id="head">
    <%--Only mobile--%>
      <link href="Styles/CommonMobile.css" rel="stylesheet" type="text/css"/>
      <link href="Styles/SiteMobile.css" rel="stylesheet" type="text/css"/>
      <script src="Scripts/CommonMobile.js" type="text/javascript"></script>
      <script src="Scripts/SiteMobile.js" type="text/javascript"></script>

    <%--All but IE --%>
      <link href="Styles/GeneralView.css" rel="stylesheet" type="text/css" />
      <script src="Scripts/GeneralView.js" type="text/javascript"></script>

    <%--Only IE --%>
      <link href="Styles/IE.css" rel="stylesheet" type="text/css" />
      <script src="Scripts/IE.js" type="text/javascript"></script>


   <%--Always--%>
      <link href="Styles/Common.css" rel="stylesheet" type="text/css" />
      <script src="Scripts/Common.js" type="text/javascript"></script>
</head>
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1 Answer

  1. Editorial Team

    A nice way is to warp them with a Literal and open it or not on code behind. I say Literal because is one of the few controls that can run inside the header and leave no extra code.

    So I do it that way

     <asp:Literal runat="server" ID="OnlyIE" EnableViewState="false" Visible="false">
       <link href="Styles/IE.css" rel="stylesheet" type="text/css" />
      <script src="Scripts/IE.js" type="text/javascript"></script>
 </asp:Literal>

    and

    protected void Page_Load(object sender, EventArgs e)
{
    if (Request.Browser.Browser == "IE")
    {
        OnlyIE.Visible = true;
    }
}

    [*] tested and working.

    A Different way is again to use the Request.Browser.Browser and fully render the css and javascript again inside a Literal, or even harder to create the controls using the Controls.Add, but all of that is much more code than this.

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