MVC5的嵌套布局

Question

I've seen a few posts on this topic: 我在这个主题上看了几篇帖子：

Razor Nested Layouts with Cascading Sections Razor嵌套布局与层叠部分

MVC 3 - Nested layouts - sections don't render in Areas MVC 3 - 嵌套布局 - 部分不在区域中渲染

And it always seems to be problematic. 它似乎总是有问题的。 However they are both pretty old so wondering if things have changed. 然而，他们都很老了，所以想知道事情是否有所改变。

Basically I have a master layout, and 3 different body templates based on what kind of page it is. 基本上我有一个主布局，以及3种不同的主体模板，基于它是什么类型的页面。 For examples sake: 例如：

_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. 现在，这在调用时呈现正常。 Almost. 几乎。

The rendering of sections must be in the child layout it seems. 部分的呈现必须在它看起来的子布局中。 If I try to put the breadcrumbs in the _Layout.cshtml , it will fail because _LayoutForEdit.cshtml never rendered it. 如果我尝试将面包屑放在_Layout.cshtml ，它将失败，因为_LayoutForEdit.cshtml从未呈现它。 How can I fix this? 我怎样才能解决这个问题？

The following sections have been defined but have not been rendered for the layout page "~/Views/Shared/_LayoutForEdit.cshtml": "breadcrumbs".

Answer 1

I know it's an old question. 我知道这是一个老问题。 I thought I'd share this anyway in case anyone else runs into this (like I did). 无论如何，我想我会分享这个，以防其他人遇到这个（就像我一样）。

At the bottom of your child layout, you define a section with the same name as the section in the parent layout. 在子布局的底部，您可以定义一个与父布局中的部分同名的部分。 Inside of this section you simply put a @RenderSection , again specifying the same name as before. 在本节的内部，您只需添加一个@RenderSection ，再次指定与之前相同的名称。 Once this is in place, you essentially have the child layout "bypass" content from pages, up to its parent layout: 一旦到位，您基本上将子布局从页面“绕过”内容，直到其父布局：

@section breadcrumbs {
    @RenderSection("breadcrumbs", true)
}

Answer 2

Not sure if you still need help, but I'll answer anyways. 不确定你是否还需要帮助，但无论如何我都会回答。

There RenderSection method takes the following parameters according to the MSDN Documentation : RenderSection方法根据MSDN文档采用以下参数：

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: 将通话更改为：

@RenderSection("breadcrumbs", false); @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. 如果“required”参数部分为false，则如果视图未包含该部分，则不会给出错误。

MVC5的嵌套布局

问题描述

2 个解决方案

解决方案1
33 已采纳 2015-05-03 18:24:24

解决方案2
2 2014-11-24 17:06:54

MVC5的嵌套布局

问题描述

2 个解决方案

解决方案1 33 已采纳 2015-05-03 18:24:24

解决方案2 2 2014-11-24 17:06:54

解决方案1
33 已采纳 2015-05-03 18:24:24

解决方案2
2 2014-11-24 17:06:54