asp.net模态窗口下载文件解决方案

思路,在模态窗口页面放一个影藏的iframe。
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();
            }
        }

OK,完成,这样可以解决模态窗口点击下载链接没反应,或者弹出提示等等一些问题。

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