如何检查SQL Server是否处于活动状态?

我有一个方法来检查并确保我的SQL Server处于联机状态,我在代码的某些连接敏感部分中使用它。

虽然它工作正常,但我注意到运行起来需要20毫秒,我想知道是否有人知道一种更好的方法来检查SQL Server,以确保它正常运行。

这是我现有的代码。

[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")]
        public static bool IsSqlServerOnline(string connectionString)
        {
#if DEBUG || DEBUG_SINGLE_CORE
            Stopwatch sw = new Stopwatch();
            sw.Start();
#endif

#if DEBUG || DEBUG_SINGLE_CORE
            // This sould only occur of we are in the VSTS designer
            if (string.IsNullOrEmpty(connectionString))
            {
                return false;
            }
#endif

            if ( !NetworkInterface.GetIsNetworkAvailable() )
            {
                return false;
            }

            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");

            bool isSqlServerOnline = false;
            SqlConnectionStringBuilder conString = new SqlConnectionStringBuilder(connectionString);

            try
            {
                using (Ping p = new Ping())
                {
                    string sqlSvr = conString.DataSource;
                    if (sqlSvr != null)
                        isSqlServerOnline = p.Send(sqlSvr).Status == IPStatus.Success;
                }
            }
            catch (PingException)
            {
                isSqlServerOnline = false;
            }

            if ( isSqlServerOnline )
            {
                try 
                {
                    conString.ConnectTimeout = 3;
                    using (SqlConnection conn = new SqlConnection(conString.ToString()))
                    {
                        conn.Open();
                        isSqlServerOnline = true;
                    }
                }
                catch ( Exception )
                {
                    isSqlServerOnline = false;
                }
            }

#if DEBUG || DEBUG_SINGLE_CORE
            sw.Stop();
            Trace.WriteLine(string.Format("IsSqlServerOnline: {0}", sw.ElapsedMilliseconds));
#endif
            return isSqlServerOnline;
        }