12 Reading the content

The page is found once per request and shared with everything that asks for it:

Where	How
an action or a page handler	a `[FromContent] IArticle article` parameter, or `[FromContent] ContentMatch match` for the template and culture too
a view, a layout, middleware: anywhere with an `HttpContext`	`Context.GetContent<IArticle>()`, or `Context.GetContentMatch()`
a service	inject `RelatudeCmsContext` and read `Content`, or `Render` for the target too

All of them give null when the request has no page. [FromContent] and GetContent<T>() also give null for a page of another type.

A shared layout reads the page for its title, whichever view renders the body:

@* Views/Shared/_Layout.cshtml *@
@using Relatude.CMS.Models
@using Relatude.DB.CMS.Web.Rendering
@{
    var page = Context.GetContent<IPage>();
}
<title>@(page?.MetaTitle ?? "My site")</title>
<meta name="description" content="@page?.MetaDescription">

`ContentMatch`	Holds
`Content`	the page, as `IItem`
`Template`	its template, chosen by the editor or found by its type; `null` when it has none
`TemplateByType`	`true` when the template was found by type rather than chosen by the editor
`TypeDefault`	the target its code default gave, when it has no template
`CultureId`, `CultureCode`	the culture the URL matched, such as `nb-NO`; empty for a URL without one

MVC does not validate a page bound with [FromContent], since validation would follow every relation of the page and read every related node.