Layout page's code not being sent to content pages

I have a _SiteLayout.cshtml file which structures the site and has some C# code on it. How do I send the _SiteLayout's C# code to all of its subpages? I am using WebPages Razor 2.

Thank you in advance.

Solution

There are two methods for implementing a layout page:

use the Layout command in the code section of every page, as outlined in Creating a Consistent Layout in ASP.NET Web Pages (Razor) Sites
or initialize the same layout page for all files in a single folder using the _PageStart.cshtml file(Customizing Site-Wide Behavior for ASP.NET Web Pages (Razor) Sites).

In the latter case you could disable the layout page for a single page using Layout = null in the code section.

Edit

If you want to pass data from a master page to a partial page, you must use the RenderPage() method instead of the RenderBody() method, but the structure of your site fully changes.

If, by example, you want to create a master page that extracts data from a table and passes them to a partial page that can change, your master page could be something like:

@{
    var db = Database.Open("Northwind");
    var data = db.Query(@"SELECT [Product Id], [Product Name], 
            [English Name] FROM Products ");
    var page = "Partial.cshtml";
}

<!DOCTYPE html>

<html lang="en">
    <head>
        <meta charset="utf-8" />
        <title></title>
    </head>
    <body>
        @RenderPage(page, new {gridData = data})
    </body>
</html>

The code in Partial.cshtml takes data from the Page.gridData variable and displays them in a WebGrid:

@{
    var grid = new WebGrid(Page.gridData);
}

<div>@grid.GetHtml()</div>