二级制流导入导出附件

             导入   

            if (this.FILEUP.PostedFile.FileName.Length <= 0)    return;
            Stream stream;
            string Path = FILEUP.PostedFile.FileName;// 文件名称
            int Size = FILEUP.PostedFile.ContentLength; // 文件大小
            string Type = FILEUP.PostedFile.ContentType; // 文件类型
            stream = FILEUP.PostedFile.InputStream;
            byte[] Content = new byte[Size];
            int Status = stream.Read(Content, 0, Size);

 

                //导出

                byte[] bytes = (byte[])ds.Tables[0].Rows[0]["files"];
                Response.Clear();
                Response.Buffer = false;
                Response.Charset = "GB2312";
                Response.ContentEncoding = System.Text.Encoding.UTF8;
                //设置读取的文件头 ;并将中文文件头转码
                Response.AddHeader("Content-Disposition", "attachment; filename=" 

                + HttpUtility.UrlEncode(ds.Tables[0].Rows[0["name"].ToString()));
                Response.AddHeader("Content-Length", bytes.Length.ToString());
                //设置输出类型 这里可以保存在数据库中 动态实现类型
                Response.ContentType = ds.Tables[0].Rows[0]["types"].ToString();
                //输出
                Response.OutputStream.Write(bytes, 0, bytes.Length);