创建一个单独的HTTP处理程序（DownloadSqlFile.ashx）：
<%@ WebHandler Language="C#" Class="DownloadHandler" %>using System;using System.Web;public class DownloadHandler : IHttpHandler { public void ProcessRequest(HttpContext context) { var fileName = "myfile.sql"; var r = context.Response; r.AddHeader("Content-Disposition", "attachment; filename=" + fileName); r.ContentType = "text/plain"; r.WriteFile(context.Server.MapPath(fileName)); } public bool IsReusable { get { return false; } }}然后，使ASP.NET页面中的按钮导航到
DownloadSqlFile.ashx。
