将rar文件直接存数据库中的类表下载操作_把rar 存储到数据库中-优快云博客

本文链接：https://blog.youkuaiyun.com/xingshikk/article/details/5909673

本文介绍了一个ASP.NET中实现文件下载的例子，包括如何从数据库读取文件内容并正确设置响应头以支持不同类型的文件下载。

CRN.Model.Individual.FileInfo info = new CRN.Model.Individual.FileInfo();
            info.Option_Action = "FileID";
            info.FileID = Convert.ToInt32(e.CommandArgument);
            DataTable dt = BLLFileInformation.SelectIDFileInformation(info).Tables[0];
            Byte[] buffer = (byte[])dt.Rows[0]["FileContent"];

            #region 获取文件的类型
            string FileType = "";
            string FileName = dt.Rows[0]["FileName"].ToString();
            FileType = FileName.Substring(FileName.LastIndexOf('.'));
            #endregion

            if (FileType.ToLower() != ".rar")
            {
                Response.Clear();
                Response.Charset = "utf-8";
                Response.ContentEncoding = System.Text.Encoding.UTF8;
                Response.ContentType = "application/msword";   //一定要写,否则是乱码
                Response.BinaryWrite(buffer);
                Response.End();
            }
            else
            {
                Response.Clear();
                Response.Charset = "utf-8";
                Response.ContentEncoding = System.Text.Encoding.UTF8;
                Response.ContentType = "application/x-msdownload;Charset=utf-8";
                Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.GetEncoding("utf-8"))); //一定要写,否则是乱码
                Response.BinaryWrite(buffer);
                Response.End();
            }