15

我有一个 SQL 2008 数据库。我正在运行一个支持该数据库的表单，然后尝试更新它。如果更新失败，想法是恢复该备份。这是我用来恢复备份的代码。

public void RestoreDatabase(String databaseName, String backUpFile, String serverName, String userName, String password)
{
    Restore sqlRestore = new Restore();
    BackupDeviceItem deviceItem = new BackupDeviceItem(backUpFile, DeviceType.File);
    sqlRestore.Devices.Add(deviceItem);
    sqlRestore.Database = databaseName;
    ServerConnection connection = new ServerConnection(serverName, userName, password);
    Server sqlServer = new Server(connection);
    sqlRestore.Action = RestoreActionType.Database;

    string logFile = System.IO.Path.GetDirectoryName(backUpFile);
    logFile = System.IO.Path.Combine(logFile, databaseName + "_Log.ldf");

    string dataFile = System.IO.Path.GetDirectoryName(backUpFile);
    dataFile = System.IO.Path.Combine(dataFile, databaseName + ".mdf");

    Database db = sqlServer.Databases[databaseName];
    RelocateFile rf = new RelocateFile(databaseName, dataFile);
    sqlRestore.RelocateFiles.Add(new RelocateFile(databaseName, dataFile));
    sqlRestore.RelocateFiles.Add(new RelocateFile(databaseName + "_log", logFile));
    sqlRestore.SqlRestore(sqlServer);
    db = sqlServer.Databases[databaseName];
    db.SetOnline();
    sqlServer.Refresh();
}

问题似乎是我选择的文件名与在线数据库不同。我基本上想用备份替换服务器上的数据库。调用 SqlRestore 时出现异常。

主要的例外说

{"服务器 'localhost' 恢复失败。"}

深入研究内部异常会显示这些错误

执行 Transact-SQL 语句或批处理时发生异常。

进而

Logical file 'DB' is not part of database 'DB'. Use RESTORE FILELISTONLY to list the logical file names.\r\nRESTORE DATABASE is terminating abnormally.

I assume there is some way to tell this to just use replace the existing DB as is.

I use this bit of code to get the file path of the DB to have a directory to dump the backup. Maybe this could be used to get the file names to recreate.

public string GetDBFilePath(String databaseName, String userName, String password, String serverName)
{
    ServerConnection connection = new ServerConnection(serverName, userName, password);
    Server sqlServer = new Server(connection);
    Database db = sqlServer.Databases[databaseName];
    return sqlServer.Databases[databaseName].PrimaryFilePath;
}
4

3 回答 3

21

I changed my back up and restore functions to look like this:

public void BackupDatabase(SqlConnectionStringBuilder csb, string destinationPath)
{
    ServerConnection connection = new ServerConnection(csb.DataSource, csb.UserID, csb.Password);
    Server sqlServer = new Server(connection);

    Backup bkpDatabase = new Backup();
    bkpDatabase.Action = BackupActionType.Database;
    bkpDatabase.Database = csb.InitialCatalog;
    BackupDeviceItem bkpDevice = new BackupDeviceItem(destinationPath, DeviceType.File);
    bkpDatabase.Devices.Add(bkpDevice);
    bkpDatabase.SqlBackup(sqlServer);
    connection.Disconnect();

}

public void RestoreDatabase(String databaseName, String backUpFile, String serverName, String userName, String password)
{
    ServerConnection connection = new ServerConnection(serverName, userName, password);
    Server sqlServer = new Server(connection);
    Restore rstDatabase = new Restore();
    rstDatabase.Action = RestoreActionType.Database;
    rstDatabase.Database = databaseName;
    BackupDeviceItem bkpDevice = new BackupDeviceItem(backUpFile, DeviceType.File);
    rstDatabase.Devices.Add(bkpDevice);
    rstDatabase.ReplaceDatabase = true;
    rstDatabase.SqlRestore(sqlServer);
}

That way they just use whatever files are there. There are no longer and directives to relocate files.

于 2009-09-23T15:46:25.993 回答
12

Thanks Remus for your answer!

I have modified 

sqlRestore.RelocateFiles.Add(new RelocateFile(databaseName, dataFileLocation));
sqlRestore.RelocateFiles.Add(new RelocateFile(databaseName + "_log", logFileLocation));

these two lines to 

System.Data.DataTable logicalRestoreFiles = sqlRestore.ReadFileList(sqlServer);
sqlRestore.RelocateFiles.Add(new RelocateFile(logicalRestoreFiles.Rows[0][0].ToString(), dataFileLocation));
sqlRestore.RelocateFiles.Add(new RelocateFile(logicalRestoreFiles.Rows[1][0].ToString(), logFileLocation));

and my code is running successfully.

Thanks for the support!

于 2010-12-03T05:23:35.820 回答
5

You are adding RelocateFile options based on the database name, that is incorrect. You should add them based on the logical file name for each file relocated. Use Restore.ReadFileList to retrieve the list of logical file names.

于 2009-09-23T15:22:46.010 回答