The use of "runat="server" in the HTML Head tag is preventing C# embedded code blocks from being converted to client-side code

After I included runat="server" in the head tag and added a CSS href with the value of <%= WebAppInstance %>, I noticed that the <%= WebAppInstance %> was not being converted to client-side code. To provide clarity on my question, please refer to the code below.

C# .Net code:

<head id="Head1" runat="server">
    <meta http-equiv="X-UA-Compatible" content="IE=9" />
    <title>Testing</title>
    <link rel="stylesheet" href="<%= WebAppInstance %>/bucket/css/bootstrap.min.css" />
</head>

Here is the HTML code as shown in the image:

Html code with highlighted problem Can you help explain what may be causing this issue? Thank you!

c#htmlcssrunatserver

Answer №1

To ensure proper syntax, please remember to eliminate the space character following <%=. Your code should look like this:

<%=WebAppInstance %>

Alternatively, you can utilize the complete version:

<% Response.Write(WebAppInstance); %>

Answer №2

If you want to dynamically add CSS to your page, you can do so programmatically. Here is an example:

protected void Page_Init(object sender, EventArgs e)
{
    var link = new HtmlLink();
    link.Href = "~/custom-css/styles.css";
    link.Attributes.Add("rel", "stylesheet");
    link.Attributes.Add("type", "text/css");
    Page.Header.Controls.Add(link);
}

Your HTML head section will then look like this:

<head runat="server">
    <meta http-equiv="X-UA-Compatible" content="IE=9" />
    <title>My Page</title>
</head>

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