using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
namespace TestMvcHelper
{
  public static class HtmlExtensions
  {
    public static MvcHtmlString Submit(this HtmlHelper helper, string value)
    {
      var builder = new TagBuilder("input"); //使我们创建的标签名字设为input
      builder.MergeAttribute("type", "submit"); //添加属性 type="submit"
      builder.MergeAttribute("value", value);
      return MvcHtmlString.Create(builder.ToString(TagRenderMode.SelfClosing)); 
    }
  }
}

@Html.Submit("提交")

http://www.CodeHighlighter.com/--> 1 /// <summary>
/// 带描述的链接扩展方法
/// </summary>
/// <param name="htmlHelper">要扩展的HtmlHelper类</param>
/// <param name="title">标题</param>
/// <param name="url">链接地址</param>
/// <param name="description">描述</param>
/// <returns>HTML代码</returns>
public static MvcHtmlString LinkWithDescription(this HtmlHelper htmlHelper, string title, string url, string description)
{
  // 生成与标题链接有关的HTML代码
  TagBuilder titleContainer = new TagBuilder("p");  // 标题链接容器p
  TagBuilder titleLink = new TagBuilder("a");  // 标题中的文字要有链接,所以包含在a标签内
  titleLink.MergeAttribute("href", url);  // 为a添加href属性并指定链接地址
  titleLink.SetInnerText(title);  // 标题文字
  titleContainer.InnerHtml = titleLink.ToString();  // 将a放到p中
  titleContainer.AddCssClass("LinkTitle");  // 为标题添加样式

  // 生成与链接描述有关的HTML代码
  TagBuilder descriptionContainer = new TagBuilder("p");  // 连接描述容器p
  descriptionContainer.InnerHtml = description;  // 描述文字
  descriptionContainer.AddCssClass("LinkDescription");  // 为描述添加样式

  // 将上述元素放入一个DIV中
  TagBuilder div = new TagBuilder("div");
  div.InnerHtml = string.Format("{0}{1}", titleContainer.ToString(), descriptionContainer.ToString());

  // 返回生成的HTML代码
  return MvcHtmlString.Create(div.ToString());
}