怎么用asp.net(c#)代码实现数据库,表的备份与恢复

//备份    public bool DBBack(string path, string DBName)    {        SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]);        string sql = "use master;";        sql += "backup database @dbName to disk=@path;";        SqlCommand cmd = new SqlCommand(sql, conn);        cmd.Parameters.Add("@dbName", SqlDbType.Char);        cmd.Parameters["@dbName"].Value = DBName;        cmd.Parameters.Add("@path", SqlDbType.Char);        cmd.Parameters["@path"].Value = DBName;        try        {            conn.Open();            cmd.ExecuteNonQuery();            conn.Close();        }        catch(Exception ex)        {            conn.Close();            return false;        }        return true;    }    //还原    public bool DBRestore(string path, string DBName)    {        SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]);        string sql = "use master;";        sql += "restore database @dbName from disk=@path;";        SqlCommand cmd = new SqlCommand(sql, conn);        cmd.Parameters.Add("@dbName", SqlDbType.Char);        cmd.Parameters["@dbName"].Value = DBName;        cmd.Parameters.Add("@path", SqlDbType.Char);        cmd.Parameters["@path"].Value = DBName;        try        {            conn.Open();            cmd.ExecuteNonQuery();            conn.Close();        }        catch (Exception ex)        {            conn.Close();            return false;        }        return true;    }