downloadtextfile.ashx

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Text;

namespace Web
{
    /// <summary>
    ///downloadFile 的摘要描述
    /// </summary>
    public class downloadFile : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            this.TestDownloadFile();
            
        }

        /// <summary>
        /// 測試下載檔案
        /// </summary>
        private void TestDownloadFile() 
        {
            HttpContext.Current.Response.ContentType = "text/plain";

            HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + string.Format("text-{0}.txt", string.Format("{0:yyyyMMddHHmmss}", DateTime.Today)));
            HttpContext.Current.Response.Clear();

            using (StreamWriter writer = new StreamWriter(HttpContext.Current.Response.OutputStream, Encoding.UTF8))
            {
                writer.Write("This is the content");
            }
            HttpContext.Current.Response.End();
            
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}