asp.net模态窗口下载文件解决方案

来源：互联网发布：codevs java 编辑：程序博客网时间：2024/05/16 10:01

思路，在模态窗口页面放一个影藏的iframe。此处的iframe只是为了触发DownLoad.aspx页面的page_load事件，完全可以用超链接等其它形式。
首先，我们新建一个模态窗口，在模态窗口a.aspx

<!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">    <base target="_self"/>    <title></title></head><body>    <form id="form1" runat="server">    <center>                    <asp:LinkButton ID="ibDownLoad" runat="server" onclick="ibDownLoad_Click">点击这里下载文件</asp:LinkButton>    </center>    <iframe id="download" runat="server" style="display:none;"></iframe>    </form></body></html>

后台代码：

protected void ibDownLoad_Click(object sender, EventArgs e)        {            string filePath = Server.MapPath("\\PDF\\a.txt");            download.Attributes["src"] = "DownLoad.aspx?filePath=" + filePath;         }

处理文件下载页面DownLoad.aspx，页面代码不写，在后台代码写：

protected void Page_Load(object sender, EventArgs e)        {            string filePath = Request.QueryString["filePath"];            //string filePath = Server.MapPath("\\PDF\\a.txt");            if (File.Exists(filePath))            {                FileInfo file = new FileInfo(filePath);                Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8"); //解决中文乱码                Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name)); //解决中文文件名乱码               // Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);                Response.AddHeader("Content-length", file.Length.ToString());                Response.ContentType = "appliction/octet-stream";                Response.WriteFile(file.FullName);                Response.End();            }        }