How Can I Obtain The Default Backup Path For Sql Server 2008 Express R2 Programmatically Using C#?

October 11, 2024 Post a Comment

I have a web application that I'll be distributing to customers. I'll give them the option of backing up and restoring the back-end SQL Server database through an admin web page.

Solution 1:

To retrieve the Backup path for a given server you could use the SQL Server Management Objects. The Server object has a property called BackupDirectory.

You'll want something like this:

Serversrv=newServer("SERVERNAME");
stringbackUpDir= srv.BackupDirectory;

For this to work you will need to import usings/references for:

Microsoft.SqlServer.Management.Smo;
Microsoft.SqlServer.Management.Common;

You will find more information here on how to interact with the SQL Server Management Objects.

Solution 2:

Try to adopt this stub:

privatevoidGetSqlDefaultInfo(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)
        {

        }
    }

Solution 3:

The following query should give you the physical device name (or path) for each database. You can tailor it to suit your needs:

select
    database_name,
    backup_type,
    physical_device_name -- pathfrom
(
    selectrow_number() over (partitionby database_name,type orderby backup_start_date desc) as rownum,
        database_name,
        case type 
            when'L'then'Log'when'D'then'Data'else'??? '+type 
        endas 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=1orderby database_name asc, backup_type

Solution 4:

I ended up using the following SqlCommand ... This solution appeared in another answer that was for some reason erased.? Anyway, here is the command I ended up using:

EXEC  master.dbo.xp_instance_regread  N'HKEY_LOCAL_MACHINE', N'Software\\Microsoft\\MSSQLServer\\MSSQLServer',N'BackupDirectory'

And here is the command in my C# code which shows the default backup folder path getting stored in the variable backupFolder:

SqlConnectionmyConnection=newSqlConnection(ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString);

            SqlCommandcmd=newSqlCommand();
            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();

            SqlDataReadermyDataReader= cmd.ExecuteReader();

            myDataReader.Read();
            stringbackupFolder= myDataReader.GetString(1);

Solution 5:

The value you're looking for is stored in the registry

Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL.2\MSSQLServerValue: BackupDirectory

Note that the key depends on your SQL Server instance name.

stiellledm310