使用C＃和SMO還原數據庫

Question

我正在嘗試使用以下C＃代碼將sql server .bak還原到空數據庫中：

                string dbBakFile = GetBackFileFromZip(restoreConfig.TmpUnZipFolder,restoreConfig.DatabaseFileToRestore);

            if (string.IsNullOrEmpty(dbBakFile))
            {
                response.Status = DatabaseResponseStatus.Error;
                response.Message = "No .bak file found in " + restoreConfig.DatabaseToRestore;
                return response;
            }

            var builder =
                new SqlConnectionStringBuilder(
                    ConfigurationManager.ConnectionStrings["myserver"].ConnectionString);

            var smoServer =
                new Server(new ServerConnection(builder.DataSource,builder.UserID,builder.Password));                

            var db = smoServer.Databases[restoreConfig.DatabaseToRestore];

            if (db != null)
            {
                smoServer.KillAllProcesses(restoreConfig.DatabaseToRestore);
                log.Debug("all processes on db killed");
            }


            string dbPath = Path.Combine(db.PrimaryFilePath, restoreConfig.DatabaseToRestore + ".mdf");

            log.Debug("db path is " +dbPath);

            string logPath = Path.Combine(db.PrimaryFilePath,restoreConfig.DatabaseToRestore + "_Log.ldf");

            log.Debug("log path is " + logPath);

            var restore = new Restore();

            var deviceItem =
                new BackupDeviceItem(dbBakFile, DeviceType.File);

            restore.DatabaseFiles.Add(dbPath);

            restore.DatabaseFiles.Add(logPath);              

            restore.Devices.Add(deviceItem);

            restore.Database = restoreConfig.DatabaseToRestore;

            restore.FileNumber = 1;

            restore.Action = RestoreActionType.Files;

            restore.ReplaceDatabase = true;

            restore.PercentCompleteNotification = 10;

            restore.PercentComplete +=restore_PercentComplete;

            restore.Complete += restore_Complete;

            restore.SqlRestore(smoServer);

            db = smoServer.Databases[restoreConfig.DatabaseToRestore];

            db.SetOnline();

            smoServer.Refresh();

            db.Refresh();

我收到以下錯誤：

Microsoft.SqlServer.Management.Smo.FailedOperationException: Restore failed for Server 'IM-M4500\SQLEXPRESS'. ---> Microsoft.SqlServer.Management.Smo.SmoException: System.Data.SqlClient.SqlError: The backup set holds a backup of a database other than the existing 'new-test-44444' database

是的，它確實擁有其他備份，我想覆蓋並替換它，還希望將mdf和日志文件移至新文件。 我在還原選項中是否缺少某些內容？

非常感謝

伊斯梅爾

Answer 1

好的，解決了這個問題，我需要給它當前的db邏輯文件名，而實際上我正在給它一個新的db邏輯文件名，所以

            //get the logical file names
            DataTable dtFileList = restore.ReadFileList(smoServer);

            string dbLogicalName = dtFileList.Rows[0][0].ToString();

            string logLogicalName = dtFileList.Rows[1][0].ToString();

            restore.RelocateFiles.Add(GetRelocateFile(dbLogicalName, dbPath));

            restore.RelocateFiles.Add(GetRelocateFile(logLogicalName, logPath));

這很好。

Answer 2

不要創建新數據庫並嘗試在其上進行還原。 而是使用以下查詢。

    RESTORE DATABASE dbname from disk='location' WITH  MOVE 'data' TO  'name.mdf' MOVE  '_Log'  TO 'name_log.ldf'

要替換現有數據庫，請將其名稱放在dbname上，並在查詢中使用WITH REPLACE