b/s程序，报由于出现错误 c00ce514 而导致此项操作无法完成

 protected void B_DownLoad_Click(object sender, EventArgs e)
        {
            string file = String.Empty;
            for (int i = 0; i < this.DL_Image_Properties.Items.Count; i++)
            {
                if (((CheckBox)this.DL_Image_Properties.Items[i].FindControl("CB_Image_Properties")).Checked == true)
                {
                    file = ((ImageButton)this.DL_Image_Properties.Items[i].FindControl("Image1")).ImageUrl.ToString();

                    string From = file.Replace(Class.Setting.usImageHttp(), usImageAddress);
                    FileInfo fi = new FileInfo(From);
                    //以字符流的形式下载文件
                    FileStream fs = new FileStream(fi.DirectoryName + fi.Name.Insert(0, "\\"), FileMode.Open);
                    byte[] bytes = new byte[(int)fs.Length];
                    fs.Read(bytes, 0, bytes.Length);
                    fs.Close();
                    Response.ContentType = "application/octet-stream";
                    //通知浏览器下载文件而不是打开     
                    Response.AddHeader("Content-Disposition", "attachment;  filename=" + HttpUtility.UrlEncode(fi.Name, System.Text.Encoding.UTF8));
                    Response.BinaryWrite(bytes);
                    Response.Flush();
                    Response.End();
                }
            }
        } 这是写的代码 --------------------编程问答--------------------  fs.Close();
不应先关闭,参考
            using (FileStream fso = new FileStream(Server.MapPath(DownAdress), FileMode.Open,FileAccess.ReadWrite,FileShare.Inheritable))
            {
                string[] filename=DownAdress.Split(new char[]{'/'});
                int len = Convert.ToInt32(fso.Length);
                byte[] FileObj = new byte[len];
                fso.Read(FileObj, 0, len);
                Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", HttpUtility.UrlEncode(filename[filename.Length - 1]), System.Text.Encoding.UTF8));
                Response.AddHeader("Content-Length", len.ToString());
                Response.ContentType = "application/octet-stream";
                Response.Charset = "UTF-8";
                Response.ContentEncoding = System.Text.Encoding.UTF8; 
                Response.BinaryWrite(FileObj);
                Response.Flush();
                Response.Clear();
                fso.Close();
            } --------------------编程问答-------------------- 有谁清楚呢？ --------------------编程问答-------------------- 这个是UpdatePanel的问题，你是不是在UpdatePanel调用这个事件的？？？

补充：.NET技术 ,  ASP.NET