数据库备份和恢复操作

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借鉴自：https://www.cnblogs.com/fishtreeyu/archive/2010/12/27/1918076.html

博主说：

-- 备份数据库backup database db_CSManage to disk='c:\backup.bak'-- 还原数据库，必须先备份该数据库的日志文件到原先的备份文件中backup log db_CSManage to disk='c:\backup.bak'restore database db_CSManage from disk='c:\backup.bak'

但在还原数据库时报错误

似乎他少写了一句话，改成这样就好了

-- 备份数据库backup database OA to disk='d:\backup.bak'-- 备份该数据库的日志文件到原先的备份文件中backup LOG OA to disk='d:\backup.bak' WITH NORECOVERY--还原数据库，restore database OA from disk='d:\backup.bak' WITH STATS = 10,RECOVERY;

结果：

好了，知道这个后直接在项目中执行该sql语句即可。

但是有个坑点，在项目开发中，数据库备份的在安装数据库的那台电脑上，并不在vs项目文件夹中，需下载回本地

MVC控制器备份数据库：

/// <summary>        /// 备份数据文件        /// </summary>        /// <param name="dbName"></param>        /// <param name="dbBackupName"></param>        /// <returns></returns>        public ActionResult Backuping(string dbName, string dbBackupName)        {            if (dbName == null || dbName.Length == 0)                return Json(new { msg = false, error = "输入的数据库不存在！" }, JsonRequestBehavior.AllowGet);            string path = ConfigurationManager.AppSettings["DbBackPath"] + dbName + "/" + DateTime.Now.ToString("yyyyMMdd");            //path = Server.MapPath(path);路径只能是服务器上的            //如果路径不存在就创建文件夹            if (!Directory.Exists(path))            {                Directory.CreateDirectory(path);            }            //判断文件是否已存在            string filePath = path + "/" + dbBackupName.Trim() + ".bak'";            if (System.IO.File.Exists(filePath))            {                System.IO.File.Delete(filePath);            }            string str = ConfigurationManager.ConnectionStrings[dbName].ToString();            using (SqlConnection con = new SqlConnection(str))            {                string strBacl = "backup database " + dbName + " to disk='" + filePath;                using (SqlCommand Cmd = new SqlCommand(strBacl, con))                {                    con.Open();                    if (Cmd.ExecuteNonQuery() != 0)                    {                        con.Close();                        return Json(new { succeed = true, filePath = filePath, error = "备份数据库成功！" }, JsonRequestBehavior.AllowGet);                    }                    else                    {                        con.Close();                        return Json(new { succeed = false, error = "备份数据库失败！" }, JsonRequestBehavior.AllowGet);                    }                }            }        }

MVC控制器还原数据库：

/// <summary>        /// 数据库恢复操作        /// </summary>        /// <param name="dbName"></param>        /// <param name="fileUrlUpload"></param>        /// <returns></returns>        public ActionResult RecoverDatabase(string dbName, string fileUrlUpload)        {            if (dbName == null || dbName.Length == 0)                return Json(new { msg = false, error = "输入的数据库不存在！" }, JsonRequestBehavior.AllowGet);            string DateStr  =ConfigurationManager.ConnectionStrings["master"].ConnectionString;            string DbFilePath = @"F:\DbBackup\tmm\20171122\tmm_ba.bak";//Session["DbFilePath"].ToString();            SqlConnection con = new SqlConnection(DateStr);            if (con.State == ConnectionState.Open)            {                con.Close();            }            SqlConnection conn = new SqlConnection(DateStr);            conn.Open();            string strSQL = "select spid from master..sysprocesses where dbid=db_id( '" + dbName + "') ";            SqlDataAdapter Da = new SqlDataAdapter(strSQL, conn);            DataTable spidTable = new DataTable();            Da.Fill(spidTable);            SqlCommand Cmd = new SqlCommand();            Cmd.CommandType = CommandType.Text;            Cmd.Connection = conn;            for (int iRow = 0; iRow <= spidTable.Rows.Count - 1; iRow++)            {                Cmd.CommandText = "kill " + spidTable.Rows[iRow][0].ToString();   //强行关闭用户进程                 Cmd.ExecuteNonQuery();            }            //--------------------------------------------------------------------            SqlConnection sqlcon = new SqlConnection(DateStr);            sqlcon.Open();            string sql = "backup DATABASE " + dbName + " to disk='" + DbFilePath + "' restore database "+dbName+" from disk='" + DbFilePath + "'";            SqlCommand sqlCmd = new SqlCommand(sql, sqlcon);            sqlCmd.ExecuteNonQuery();            sqlCmd.Dispose();            sqlcon.Close();            sqlcon.Dispose();            return Json(new { succeed = false, error = "备份数据库失败！" }, JsonRequestBehavior.AllowGet);        }

先需要切换到系统数据库下，然后先删除与需还原数据库相关的进程，然后在还原之前得先把数据库日志备份到开始的备份文件中，然后才还原备份文件，要不然会出错的，链接字符串在config文件中

明天再贴效果图，

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