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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="library_details.aspx.cs" Inherits="AttenceWeb.WorldHome.library_details" %>
<!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 id="Head1" runat="server">
<title>文件下载</title>
<script src="Scripts/jquery-1.8.3.min.js" type="text/javascript"></script>
</head>
<body>
<form id="form1" runat="server">
<table border="0" cellpadding="0" cellspacing="0" width="80%">
<tr height="30">
<td class="td_title">
文件下载：
</td>
<td id="tdfile" colspan="3">
<span id="doowntimes" runat="server"></span><a href="#" onclick="downFile();">下载
</a>
</td>
</tr>
</table>
<iframe id="exportIFrame" style="display: none;"></iframe>
<input type="hidden" value="" id="hidNewId" runat="server" />
</form>
</Body>
</html>
<script type="text/jscript">
//下载文件
function downFile() {
var newsid = $("#hidNewId").val();
//附件下载
var url = "downloadfile.aspx?newsid=" + newsid;
var exportIFrame = document.getElementById("exportIFrame");
exportIFrame.src = url;
}
</script>
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="downloadfile.aspx.cs" Inherits="AttenceWeb.WorldHome.downloadfile" %>
<!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 runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div> </div>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Attence.Logic;
using CommonBaseV1_0;
namespace AttenceWeb.WorldHome {
public partial class downloadfile : System.Web.UI.Page
{
Sys_LibraryFileBLL bll = new Sys_LibraryFileBLL();
ReturnObj rObj = new ReturnObj();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string id = Context.Request["newsid"];
//根据附件ID获取附件信息
rObj = bll.GetFileByNewsId(id);
if (rObj.IsSuccess)
{
taTable result = rObj.ObjValue as DataTable;
if (result.Rows.Count > 0)
{
//路径
sing fname = result.Rows[0]["FilePath"].ToString();
//文件名
string title = result.Rows[0]["FileName"].ToString();
string path = fname + title;
//获取当前正在执行的服务器应用程序的根目录的物理文件系统路径
//string tempFile = Request.PhysicalApplicationPath;
//string dataDir = tempFile + "UploadFiles\\";
if (File.Exists(path))
{
try
{
System.IO.FileInfo file = new System.IO.FileInfo(path);
Response.Clear();
Response.ClearHeaders();
Response.Buffer = false;
Response.ContentType = "application/octet-stream";
Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(title, System.Text.Encoding.UTF8));
Response.AppendHeader("Content-Length", file.Length.ToString());
Response.WriteFile(file.FullName);
Response.Flush();
HttpContext.Current.ApplicationInstance.CompleteRequest();
}
catch (Exception ex)
{
Response.Write(ex.ToString());
}
}else{
Response.Write("文件不存在“);
}
}
}
}
}
}
}
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原文地址：http://www.cnblogs.com/lk516924/p/5462058.html
