.NET MVC 中创建自定义 HtmlHelper（带源码）

1.创建PageHelper类：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.IO;
 4 using System.Linq;
 5 using System.Web;
 6 using System.Web.Mvc;
 7 using System.Web.Mvc.Html;
 8 
 9 namespace MvcHtmlHelper
10 {
11     public static class PageHelper
12     {
13         public static MvcHtmlString RenderView(this HtmlHelper htmlHelper,string fileName)
14         {
15             string fullfilename = HttpContext.Current.Server.MapPath(fileName);
16             if(File.Exists(fullfilename))
17             {
18                 return PartialExtensions.Partial(htmlHelper, fileName);
19             }
20             else
21             {
22                 return null;
23             }
24         }
25     }
26 }

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：

 1 @{
 2     ViewBag.Title = "Index";
 3 }
 4 @using MvcHtmlHelper;
 5 <h2>Index</h2>
 6 
 7 @*调用方法1*@
 8 @*@PageHelper.RenderView(this.Html,"~/Views/MyView.cshtml")*@
 9 
10 @*调用方法2*@
11 @Html.RenderView("~/Views/MyView.cshtml")

 代码：http://pan.baidu.com/s/1qW3H9m8