.net中下载文件的方法 WriteFile实现下载

protected void Button2_Click(object sender, EventArgs e)
        {
            string fileName = "chracater14.jpg";//客户端保存的文件名
            string filePath = Server.MapPath("../../images/chracater14.jpg");//路径

            FileInfo fileInfo = new FileInfo(filePath);
            Response.Clear();
            Response.ClearContent();
            Response.ClearHeaders();
            Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
            Response.AddHeader("Content-Length", fileInfo.Length.ToString());
            Response.AddHeader("Content-Transfer-Encoding", "binary");
            Response.ContentType = "application/octet-stream";
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
            Response.WriteFile(fileInfo.FullName);
            Response.Flush();
            Response.End();
        }

 感谢网友http://apps.hi.baidu.com/share/detail/24298464