how to set tags of html head section using code

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My project is an asp.net webpages website which has a layout including head section of pages. I wana do this:

HTML

<head>
   <link rel="canonical" href="@App.PathHome" />
</head>

but not in layout. I wana add it dynamically via asp.net code in the home page. How is the syntax?
Now I am trying this:

C#

//Define an HtmlLink control.
HtmlLink myHtmlLink = new HtmlLink();
myHtmlLink.Href = "/Default";
myHtmlLink.Attributes.Add("rel", "canonical");
// Add the HtmlLink to the Head section of the page.
Page.Header.Controls.Add(myHtmlLink);

but getting the error "Cannot perform runtime binding on a null reference" for the last code line.

Posted 6-May-13 21:43pm

cs101000

Updated 7-May-13 5:36am

v4

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[no name] 7-May-13 11:01am

do you want to use something like this ?
<title> <%=pageTitle%></title>

cs101000 7-May-13 11:34am

No. I am trying to do just the action in the above head element. But because I have a head element in site layout, if I put another in a child page I'd have 2 head elements in that page. So, I am trying to do that through code (and avoid html markup)

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Gianmaria Gregori · Accepted Answer · 2013-05-07T12:12:00

I'm not sure you can use controls in WebMatrix.
Anyway, maybe you can accomplish your task with the use of sections.
If you add the row

C#

@RenderSection("otherlinks", required: false)

in the head of your site layout page and

C#

@section otherlinks {
    <link rel="canonical" href="@App.PathHome" />
}

in your child page, the resulting page should work.