如何使用C#以编程方式获取SQL Server 2008 Express R2的默认备份路径
本文关键字:R2 Express 2008 默认 路径 备份 Server SQL 何使用 编程 获取 | 更新日期: 2023-09-27 18:19:53
我有一个将分发给客户的web应用程序。我将通过管理网页为他们提供备份和恢复后端SQL Server数据库的选项。
对于备份,我只是使用时间戳以编程方式创建一个文件名,并让SQL Server将其保存在默认的备份文件夹中。为了恢复,我想列出备份文件,让用户选择使用哪一个,但我不知道获得文件列表的默认备份文件夹是什么。
如何使用C#以编程方式获取SQL Server 2008 Express R2的默认备份文件夹?
感谢
要检索给定服务器的备份路径,可以使用SQL server管理对象。Server
对象具有名为BackupDirectory的属性。
你会想要这样的东西:
Server srv = new Server("SERVERNAME");
string backUpDir = srv.BackupDirectory;
为此,您需要导入usings/references For:
Microsoft.SqlServer.Management.Smo;
Microsoft.SqlServer.Management.Common;
您将在此处找到有关如何与SQL Server管理对象交互的详细信息。
尝试采用这个存根:
private void GetSqlDefaultInfo(string InstanceName, string ServerName)
{
try
{
InstanceName = string.IsNullOrEmpty(InstanceName) ? "MSSQLSERVER" : InstanceName;
if (string.IsNullOrEmpty(ServerName))
ServerName = Environment.MachineName;
using (var registryKey = RegistryKey.OpenRemoteBaseKey(RegistryHive.LocalMachine, ServerName))
{
object sqlInstance;
using (var subKey = registryKey.OpenSubKey(@"SOFTWARE'Microsoft'Microsoft SQL Server'Instance Names'SQL"))
sqlInstance = subKey.GetValue(InstanceName);
if (sqlInstance != null && !string.IsNullOrEmpty(sqlInstance.ToString()))
{
var sqlPathKey = string.Format(@"SOFTWARE'Microsoft'Microsoft SQL Server'{0}'MSSQLServer",
sqlInstance);
object defaultData, defaultLog, backupDirectory, sqlPath;
using (var subKey = registryKey.OpenSubKey(sqlPathKey))
{
defaultData = subKey.GetValue("DefaultData");
defaultLog = subKey.GetValue("DefaultLog");
backupDirectory = subKey.GetValue("BackupDirectory");
}
sqlPathKey = string.Format(@"SOFTWARE'Microsoft'Microsoft SQL Server'{0}'Setup", sqlInstance);
using (var subKey = registryKey.OpenSubKey(sqlPathKey))
sqlPath = subKey.GetValue("SQLDataRoot");
DataFilePath = defaultData != null
? defaultData.ToString()
: Path.Combine(sqlPath.ToString(), "Data").TrimEnd('''');
LogFilePath = defaultLog != null
? defaultLog.ToString()
: Path.Combine(sqlPath.ToString(), "Data").TrimEnd('''');
FTSIndexFilePath = DataFilePath;
ContentFilePath = DataFilePath;
BackupFilePath = backupDirectory != null
? backupDirectory.ToString()
: Path.Combine(sqlPath.ToString(), "Backup").TrimEnd('''');
}
}
} catch(Exception)
{
}
}
下面的查询应该为您提供每个数据库的物理设备名称(或路径)。您可以根据自己的需求进行定制:
select
database_name,
backup_type,
physical_device_name -- path
from
(
select
row_number() over (partition by database_name,type order by backup_start_date desc) as rownum,
database_name,
case type
when 'L' then 'Log'
when 'D' then 'Data'
else '??? '+type
end as backup_type,
physical_device_name
from msdb.dbo.backupset a
join msdb..backupmediaset b on a.media_set_id = b.media_set_id
join msdb.dbo.backupmediafamily c on a.media_set_id = c.media_set_id
) x
where rownum=1
order by database_name asc, backup_type
我最终使用了以下SqlCommand。。。这个解决方案出现在另一个答案中,但由于某种原因被删除了。?不管怎样,这是我最终使用的命令:
EXEC master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software''Microsoft''MSSQLServer''MSSQLServer',N'BackupDirectory'
这是我的C#代码中的命令,它显示了存储在变量backupFolder:中的默认备份文件夹路径
SqlConnection myConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString);
SqlCommand cmd = new SqlCommand();
SqlDataReader reader;
cmd.CommandText = "EXEC master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software''Microsoft''MSSQLServer''MSSQLServer',N'BackupDirectory'";
cmd.CommandType = CommandType.Text;
cmd.Connection = myConnection;
myConnection.Open();
SqlDataReader myDataReader = cmd.ExecuteReader();
myDataReader.Read();
string backupFolder = myDataReader.GetString(1);
您要查找的值存储在注册表中
Key: HKEY_LOCAL_MACHINE'SOFTWARE'Microsoft'Microsoft SQL Server'MSSQL.2'MSSQLServer
Value: BackupDirectory
请注意,密钥取决于您的SQL Server实例名称。
declare @regread nvarchar(max)
select top 1 @regread = substring(registry_key,6,len(registry_key)-16)
from sys.dm_server_registry
where registry_key like '%Parameters'
group by registry_key
select @regread = 'exec master..xp_regread ''HKEY_LOCAL_MACHINE'','''+@regread+''', ''BackupDirectory'''
exec sp_executesql @regread