Mvc Excel导出控制器扩展

实现代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Reflection;
using System.Text;

namespace HtmlHelperDemo.Extension
{
    public class ExportExcelResult : ActionResult
    {
        private string filename;
        private IEnumerable<object> source;
        public ExportExcelResult(IEnumerable<object> source, string filename)
        {
            this.source = source;
            this.filename = filename;
        }
        public override void ExecuteResult(ControllerContext context)
        {
            if (source != null && source.Any())
            {
                context.RequestContext.HttpContext.Response.AppendHeader("content-disposition", "attachment;filename=" + filename);
                context.RequestContext.HttpContext.Response.ContentEncoding = Encoding.GetEncoding("gb2312");
                context.RequestContext.HttpContext.Response.ContentType = "application/excel";
                object obj = source.FirstOrDefault();
                PropertyInfo[] infos = obj.GetType().GetProperties();
                foreach (var item in infos)
                {
                    var cutomeObj = item.GetCustomAttributes(typeof(DescriptionAttribute), false);
                    if (cutomeObj != null && cutomeObj.Any())
                    {
                        DescriptionAttribute desc = cutomeObj[0] as DescriptionAttribute;
                        context.RequestContext.HttpContext.Response.Write(desc.Descrip);
                        context.RequestContext.HttpContext.Response.Write("\t");
                    }
                }
                context.RequestContext.HttpContext.Response.Write("\n");
                foreach (var item in source)
                {
                    PropertyInfo[] infoarr = item.GetType().GetProperties();
                    foreach (var info in infoarr)
                    {
                        var val = info.GetValue(item, null);
                        context.RequestContext.HttpContext.Response.Write(val);
                        context.RequestContext.HttpContext.Response.Write("\t");
                    }
                    context.RequestContext.HttpContext.Response.Write("\n");
                }
                context.RequestContext.HttpContext.Response.End();
            }
            else
                throw new ArgumentNullException("source  can't  be  null");
        }

    }


    public class DescriptionAttribute : Attribute
    {
        public string Descrip;
        public DescriptionAttribute(string descrip)
        {
            this.Descrip = descrip;
        }
    }
}

调用代码如下：

     public ActionResult Index3()
        {
            List<Studnet> list = new List<Studnet>();
            list.Add(new Studnet() { ID = 1, Name = "aaa" });
            list.Add(new Studnet() { ID = 2, Name = "bbb" });
            return new ExportExcelResult(list, "aaa.xls");
        }
        public class Studnet
        {
            [Description("编号")]
            public int ID { get; set; }
            [Description("姓名")]
            public string Name { get; set; }

        }