JS下载文件|无刷新下载文件

浏览数：21 / 时间：2015年06月09日

后台代码Handler.ashx

<%@ WebHandler Language="C#" Class="Handler" %>

using System;
using System.Web;

public class Handler : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        string fileName = "web.config";//客户端保存的文件名   
        string filePath = context.Server.MapPath("web.config");//路径  
        //以字符流的形式下载文件   
        System.IO.FileStream fs = new System.IO.FileStream(filePath, System.IO.FileMode.Open);
        byte[] bytes = new byte[(int)fs.Length];
        fs.Read(bytes, 0, bytes.Length);
        fs.Close();
        context.Response.ContentType = "application/octet-stream";
        //通知浏览器下载文件而不是打开   
        context.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
        context.Response.BinaryWrite(bytes);
        context.Response.Flush();
        context.Response.End(); 
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}

前端代码:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>

    <script src="jquery-1.7.2.min.js" type="text/javascript"></script>
    <title></title>
    <script>
        function download_file(url)
        {

            if (typeof (download_file.iframe) == "undefined")
            {
                var iframe = document.createElement("iframe");
                download_file.iframe = iframe;
                document.body.appendChild(download_file.iframe);
            }
            // alert(download_file.iframe);
            download_file.iframe.src = url;

            download_file.iframe.style.display = "none";



        }
    </script>
</head>
<body>
<a href="javascript:void(0);" onclick="download_file(‘Handler.ashx‘)">aaaaa</a>
<a href="javascript:void(0);" onclick="download_file(‘Handler.ashx‘)">bbbbb</a>
<a href="javascript:void(0);" onclick="download_file(‘Handler.ashx‘)">ccccc</a>

</body>
</html>

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JS下载文件|无刷新下载文件