Question

我有一个以下代码，几乎所有这些代码都适用于我的大多数服务器，但对于某些特定的服务器，它只是在查询的第二部分失败。此代码查询SQL Server服务优先，第二部分查询SQL Sevrer代理服务。

我已经尝试了创建另一个Scope和Query Object的所有可能组合，但不知怎的，我试图查询的服务器没有返回第二部分，看起来像连接范围并执行第一个查询后，第二部分被阻止服务器上的东西..！对此问题的任何帮助表示赞赏..几乎99％的服务器工作正常并返回所需的结果，但只有2或3台服务器因第二部分而失败。

如果这是服务器上的WMI问题吗？有没有其他方法来实现这些状态..？像IPC或套接字..？请帮忙..！

哈希。

try
{
    agentserviceName = "SQLSERVERAGENT";
    serviceName = "MSSQLSERVER";
    query = new System.Management.SelectQuery(string.Format("select name, startname, State, StartMode from Win32_Service where name = '{0}'", serviceName));
    ManagementScope scope = new ManagementScope("\\\\" + srvName + "\\root\\cimv2");
    //ManagementScope scope = new ManagementScope("\\\\ST0176V\\root\\cimv2");
    scope.Connect();
    System.Management.ManagementObjectSearcher searcher = new System.Management.ManagementObjectSearcher(scope, query);

    // MessageBox.Show((String)dgv_ChangeSvcAccount.Rows[i].Cells[1].Value.ToString());
    foreach (ManagementObject service in searcher.Get())
    {
        dgv_ChangeSvcAccount.Rows[i].Cells[4].Value = service["startname"];
        dgv_ChangeSvcAccount.Rows[i].Cells[4].Tag = serviceName;
        dgv_ChangeSvcAccount.Rows[i].Cells[5].Value = "Currently : " + service["State"] + " - Set As : " + service["StartMode"];
    }

    if (searcher.Get().Count == 0)
    {
        dgv_ChangeSvcAccount.Rows[i].Cells[4].Value = "NO SQL Service Found";
    }

    searcher.Dispose();

    ManagementScope scope2 = new ManagementScope("\\\\" + srvName + "\\root\\cimv2");

    // ObjectQuery query2 = new ObjectQuery("SELECT * FROM Win32_Service WHERE NAME LIKE '" + serviceName.ToString().ToUpper() + "'");

    System.Management.SelectQuery query2 = new System.Management.SelectQuery(string.Format("select name, startname, State, StartMode from Win32_Service where name like '{0}'", agentserviceName));
    System.Management.ManagementObjectSearcher searcher1 = new System.Management.ManagementObjectSearcher(scope2, query2);
    foreach (ManagementObject service in searcher1.Get()) // <---- this line throws exception for invalid query, and it is always 2 servers which does that, rest of servers returns proper results. the servers which throws this Invlid Query exceptions are Windows 2000 Server with SP4.
    {
        dgv_ChangeSvcAccount.Rows[i].Cells[6].Value = service["startname"];
        dgv_ChangeSvcAccount.Rows[i].Cells[6].Tag = agentserviceName;
        dgv_ChangeSvcAccount.Rows[i].Cells[7].Value = "Currently : " + service["State"] + " - Set As : " + service["StartMode"];
    }
    searcher1.Dispose();        
}
catch (System.Exception ex)
{
    MessageBox.Show(ex.Message.ToString());
}

Answer 1

因为，正如我们在评论中讨论的那样，我们认为它可能与拥有多个活动ManagementScope对象有关，请尝试将代码的前半部分更改为：

string agentserviceName = "SQLSERVERAGENT";
string serviceName = "MSSQLSERVER";
// Let the SelectQuery class build our WQL query text...
string className = "Win32_Service";
string condition = string.Format("Name = '{0}'", serviceName);
string[] selectedProperties = new string[] { "Name", "StartName", "State", "StartMode" };
SelectQuery query = new SelectQuery(className, condition, selectedProperties);

using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(query))
{
    searcher.Scope = new ManagementScope("\\\\" + srvName + "\\root\\cimv2");

    foreach (ManagementObject service in searcher.Get())
    {
        dgv_ChangeSvcAccount.Rows[i].Cells[4].Value = service["startname"];
        dgv_ChangeSvcAccount.Rows[i].Cells[4].Tag = serviceName;
        dgv_ChangeSvcAccount.Rows[i].Cells[5].Value = "Currently : " + service["State"] + " - Set As : " + service["StartMode"];
    }

    if (searcher.Get().Count == 0)
    {
        dgv_ChangeSvcAccount.Rows[i].Cells[4].Value = "NO SQL Service Found";
    }
}

// Second query goes here...

当第一个查询完成后，它会为ManagementObjectSearcher处理它，并确保它只保留对远程服务器ManagementScope的唯一引用。

WMI在第二次尝试查询同一服务器时抛出异常“无效查询”

1 个答案: