How to render JavaScript into MasterLayout section from partial view?

问题

Given MVC3 and Razor engine, I got

_MasterLayout.cshtml

@RenderSection("JavaScript", required: false)
..
..
@RenderBody()
..

View.cshtml with _MasterLayout.cshtml defined in _ViewStart.cshtml

..
@Html.RenderAction("PartialView", "PartialController")
..

PartialView.cshtml

..
@section JavaScript
{
........
}
..

How can I make sure that JavaScript from Partial View ends up in the Master Layout section?

Edit

The above scenario doesn't work because the partial view doesn't have a master layout defined. View, on the other hand, does have Layout with RenderSection defined. If I move section JavaScript from Partial View to View, Razor knows where to render it to. But, since partial view doesn't have a layout, it doesn't know what to do with section JavaScript and thus doesn't render it anywhere.

回答1:

I don't believe a Partial View can set sections to be used in the layout page :(

It looks like there are no nice solutions to this - you could include two partials (one for script, one for content):

<script stuff>
@Html.RenderAction("PartialViewScripts", "PartialController")
</script stuff>
<body stuff>
@Html.RenderAction("PartialView", "PartialController")
</body stuff>

回答2:

I created a set of extension methods to render scripts blocks (or anything) from a partial, into the main layout.

public static class ViewPageExtensions
{  
 private const string SCRIPTBLOCK_BUILDER = "ScriptBlockBuilder";

    public static MvcHtmlString ScriptBlock(
        this WebViewPage webPage,
        Func<dynamic, HelperResult> template)
    {
        if (!webPage.IsAjax)
        {
            var scriptBuilder = webPage.Context.Items[SCRIPTBLOCK_BUILDER] 
                                as StringBuilder ?? new StringBuilder();

            scriptBuilder.Append(template(null).ToHtmlString());

            webPage.Context.Items[SCRIPTBLOCK_BUILDER] = scriptBuilder;

            return new MvcHtmlString(string.Empty);
        }
        return new MvcHtmlString(template(null).ToHtmlString());
    }

    public static MvcHtmlString WriteScriptBlocks(this WebViewPage webPage)
    {
        var scriptBuilder = webPage.Context.Items[SCRIPTBLOCK_BUILDER] 
                            as StringBuilder ?? new StringBuilder();

        return new MvcHtmlString(scriptBuilder.ToString());
    }
}

Then it can be used like so:

@this.ScriptBlock(
@<script  type='text/javascript'>
    $(document).ready(function () {
        notify('@message', '@Model.Type.ToString()',                    
               '@Model.Type.ToString().ToLower()');
    });
</script>)

And then rendered in the main layout:

@this.WriteScriptBlocks()

Check out the full article here: A Script-Block Templated Delegate for Inline-Scripts in Razor Partials

回答3:

This worked for me allowing me to co-locate javascript and html for partial view in same file for ease of readability

In View which uses Partial View called "_MyPartialView.cshtml"

<div>
    @Html.Partial("_MyPartialView",< model for partial view>,
            new ViewDataDictionary { { "Region", "HTMLSection" } } })
</div>

@section scripts{

    @Html.Partial("_MyPartialView",<model for partial view>, 
                  new ViewDataDictionary { { "Region", "ScriptSection" } })

 }

In Partial View file

@model SomeType

@{
    var region = ViewData["Region"] as string;
}

@if (region == "HTMLSection")
{


}

@if (region == "ScriptSection")
{
        <script type="text/javascript">
    </script">
}

来源：https://stackoverflow.com/questions/5981490/how-to-render-javascript-into-masterlayout-section-from-partial-view

标签

asp.net-mvc-3

c#-4.0

razor