SMO ManagedComputer.ServiceInstances 为空

Question

我正在尝试使用 SMO（VS 2010、SQL Server 2008）连接到 SQL Server 并查看服务器协议配置。我可以连接并列出服务和 ClientProtocols 以及运行 MSSQLSERVER 服务的帐户。但是，ServerInstances 集合是空的。目标服务器上唯一的实例是默认的 (MSSQLSERVER)，它不应该在集合中吗？如何获取它的实例以便检查 ServerProtocols 集合？这是我正在使用的代码：

    class Program
{
    static void Main(string[] args)
    {
        //machine hosting installed sql server instance
        ManagedComputer host = new ManagedComputer("fully-qualified.host.name");


        if (host.ServerInstances.Count != 0)
        {
            //why is this 0? Is it because only the DEFAULT instance exists?
            Console.WriteLine("/////////////// INSTANCES ////////////////");
            foreach (ServerInstance inst in host.ServerInstances)
            {
                Console.WriteLine(inst.Name);
            }
        }

        Console.WriteLine("/////////////// SERVICES ////////////////");
        // enumerate sql services (looking for MSSSQLSERVER)
        foreach (Service svc in host.Services)
        {
            Console.WriteLine(svc.Name);
        }

        Console.WriteLine("/////////////// DETAILS ////////////////");

        // get name of MSSQLSERVER instance from user (pick from list above)
        Service mssqlserver = host.Services["MSSQLSERVER"];

        // print service account: .\{account} == "local account", "LocalSystem", "NetworkService", {domain}\{account} == "domain account"
        Console.WriteLine("Service Account: {0}", mssqlserver.ServiceAccount);

        // get client protocols
        foreach (ClientProtocol cp in host.ClientProtocols)
        {
            Console.WriteLine("{0} {1} ({2})", cp.Order, cp.DisplayName, cp.IsEnabled ? "Enabled" : "Disabled");
        }

    }
}

我也试过：

            Urn u = new Urn("ManagedComputer[@Name='fully-qualified.host.name']/ServerInstance[@Name='MSSQLSERVER']/ServerProtocol[@Name='Tcp']");
        ServerProtocol tcp = host.GetSmoObject(u) as ServerProtocol;
        if (tcp != null)
        {
            Console.WriteLine("{0}", tcp.DisplayName);
        }

但是我收到一条错误消息，指出：“不支持子表达式。” 任何想法有什么问题？

Answer 1

要在 ServerInstances 列表中获取结果，您需要显式设置：

host.ConnectionSettings.ProviderArchitecture = ProviderArchitecture.Use64bit;

或者

host.ConnectionSettings.ProviderArchitecture = ProviderArchitecture.Use32bit;