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  • ASP.NET 文件下载

    下载页面:
     <a href="download.ashx?url=<%=Server.UrlEncode("说明.txt")%>">下载</a>
    ------------------------------------------------------------------------------
    download.ashx

    <%@ WebHandler Language="C#" Class="download" %>
    using System;
    using System.Web;
    public class download : IHttpHandler {
       
        public void ProcessRequest (HttpContext context) {
            string url = HttpContext.Current.Server.UrlDecode(context.Request.QueryString["url"]);
            downloadfile(url);
        }
     
        public bool IsReusable {
            get {
                return false;
            }
        }
        public void downloadfile(string s_fileName)
        {
           HttpContext.Current.Response.ContentType = "application/ms-download";
           string s_path = HttpContext.Current.Server.MapPath("~/") + s_fileName;
           System.IO.FileInfo file = new System.IO.FileInfo(s_path);
           HttpContext.Current.Response.Clear();
           HttpContext.Current.Response.AddHeader("Content-Type", "application/octet-stream");
           HttpContext.Current.Response.Charset = "utf-8";
           HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));
           HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());
           HttpContext.Current.Response.WriteFile(file.FullName);
           HttpContext.Current.Response.Flush();
           HttpContext.Current.Response.Clear();
           HttpContext.Current.Response.End();
        }
    }
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  • 原文地址:https://www.cnblogs.com/gdjlc/p/2086956.html
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