.NET MVC 中创建自定义 HtmlHelper（带源码）

1.创建PageHelper类：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Mvc.Html;

namespace MvcHtmlHelper
{
    public static class PageHelper
    {
        public static MvcHtmlString RenderView(this HtmlHelper htmlHelper,string fileName)
        {
            string fullfilename = HttpContext.Current.Server.MapPath(fileName);
            if(File.Exists(fullfilename))
            {
                return PartialExtensions.Partial(htmlHelper, fileName);
            }
            else
            {
                return null;
            }
        }
    }
}

2.在Views文件夹下面随意创建一个视图MyView.cshtml

3.视图中调用方式：

@{
    ViewBag.Title = "Index";
}
@using MvcHtmlHelper;
<h2>Index</h2>

@*调用方法1*@
@*@PageHelper.RenderView(this.Html,"~/Views/MyView.cshtml")*@

@*调用方法2*@
@Html.RenderView("~/Views/MyView.cshtml")

 代码：http://pan.baidu.com/s/1qW3H9m8