I've seen a few posts on this topic:
Razor Nested Layouts with Cascading Sections
MVC 3 - Nested layouts - sections don't render in Areas
And it always seems to be problematic. However they are both pretty old so wondering if things have changed.
Basically I have a master layout, and 3 different body templates based on what kind of page it is. For examples sake:
_Layout.cshtml
<html lang="en">
<head>
</head>
<body style="padding: 50px 0;">
<header class="navbar navbar-default navbar-fixed-top" role="banner">
@Html.Partial("_MenuPartial")
</header>
<ol class="breadcrumbs">
@RenderSection("breadcrumbs", true);
</ol>
<section>
@RenderBody();
</section>
<footer class="navbar navbar-default navbar-fixed-bottom">
@Html.Partial("_FooterPartial")
</footer>
@Html.Partial("_ScriptInitPartial")
</body>
</html>
_LayoutForEdit.cshtml
<div class="panel panel-primary">
<div class="panel-body">
<div class="col-lg-2">
<ul class="nav nav-pills nav-stacked">
@RenderSection("tabs", true)
</ul>
</div>
<div class="col-lg-10">
<div class="tab-content">
@RenderBody()
</div>
</div>
</div>
<div class="panel-footer">
<button class="btn btn-primary" data-bind="enable: Entity.isValid, click: save">Save</button>
</div>
</div>
Now this renders fine when called. Almost.
The rendering of sections must be in the child layout it seems. If I try to put the breadcrumbs in the _Layout.cshtml, it will fail because _LayoutForEdit.cshtml never rendered it. How can I fix this?
The following sections have been defined but have not been rendered for the layout page "~/Views/Shared/_LayoutForEdit.cshtml": "breadcrumbs".
I know it's an old question. I thought I'd share this anyway in case anyone else runs into this (like I did).
At the bottom of your child layout, you define a section with the same name as the section in the parent layout. Inside of this section you simply put a @RenderSection, again specifying the same name as before. Once this is in place, you essentially have the child layout "bypass" content from pages, up to its parent layout:
@section breadcrumbs {
@RenderSection("breadcrumbs", true)
}
Not sure if you still need help, but I'll answer anyways.
There RenderSection method takes the following parameters according to the MSDN Documentation:
public HelperResult RenderSection(
string name,
bool required
)
Parameters
name
Type: System.String
The section to render.
required
Type: System.Boolean
true to specify that the section is required; otherwise, false.
Change the call to:
@RenderSection("breadcrumbs", false);
If the section "required" parameter is false, it will not give an error if that section is not included by a view.
来源：https://stackoverflow.com/questions/21026917/nested-layouts-for-mvc5