Populate a Razor Section From a Partial

Question

My main motivation for trying to do this is to get Javascript that is only required by a partial at the bottom of the page with the rest of the Javascript and not in the mid

Answer 1

Base on the answer from Mr Bell And Shimmy above, I add on extra function for Bundle script.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.Web.Mvc;
namespace ABC.Utility
{
public static  class PartialViewHelper
{
    public static string RequireScript(this HtmlHelper html, string path, int priority = 1)
    {
        var requiredScripts = HttpContext.Current.Items["RequiredScripts"] as List;
        if (requiredScripts == null) HttpContext.Current.Items["RequiredScripts"] = requiredScripts = new List();
        if (!requiredScripts.Any(i => i.Path == path)) requiredScripts.Add(new ResourceInclude() { Path = path, Priority = priority });
        return null;
    }

    public static string RequireBundleStyles(this HtmlHelper html, string bundleName)
    {
        var a = System.Web.Optimization.Styles.Render(bundleName);
        var requiredStyles = HttpContext.Current.Items["RequiredStyles"] as IHtmlString;
        if (requiredStyles == null) HttpContext.Current.Items["RequiredStyles"] = requiredStyles = a;
        return null;
    }

    public static string RequireBundleScripts(this HtmlHelper html, string bundleName)
    {
        var a=System.Web.Optimization.Scripts.Render(bundleName);
        var requiredScripts = HttpContext.Current.Items["RequiredScripts"] as IHtmlString;
        if (requiredScripts == null) HttpContext.Current.Items["RequiredScripts"] = requiredScripts = a;
        return null;
    }

    public static HtmlString EmitRequiredBundleStyles(this HtmlHelper html)
    {
        var requiredStyles = HttpContext.Current.Items["RequiredStyles"] as IHtmlString;
        if (requiredStyles == null) return null;
        return MvcHtmlString.Create(requiredStyles.ToHtmlString()) ;
    }

    public static HtmlString EmitRequiredBundleScripts(this HtmlHelper html)
    {
        var requiredScripts = HttpContext.Current.Items["RequiredScripts"] as IHtmlString;
        if (requiredScripts == null) return null;
        return MvcHtmlString.Create(requiredScripts.ToHtmlString());
    }

    public static HtmlString EmitRequiredScripts(this HtmlHelper html)
    {
        var requiredScripts = HttpContext.Current.Items["RequiredScripts"] as List;
        if (requiredScripts == null) return null;
        StringBuilder sb = new StringBuilder();
        foreach (var item in requiredScripts.OrderByDescending(i => i.Priority))
        {
            sb.AppendFormat("\n", item.Path);
        }
        return new HtmlString(sb.ToString());
    }
    public class ResourceInclude
    {
        public string Path { get; set; }
        public int Priority { get; set; }
    }
}//end class
}// end namespace  

Sample on PartialView :- @Html.RequireBundleStyles("~/bundles/fileupload/bootstrap/BasicPlusUI/css"); @Html.RequireBundleScripts("~/bundles/fileupload/bootstrap/BasicPlusUI/js");

Sample on MasterPage :- @Html.EmitRequiredBundleStyles()