Question

我正在使用WMI在远程计算机上安装/启动/停止等服务。这很好用，只有UserControlService的调用似乎是一个问题。

我知道也可以冒充用户然后使用ServiceController类，但由于我已经有了所有其他方法，我宁愿保留WMI代码并让我的方法发送服务控制请求。

以下代码：

 public static string SendServiceControlRequest(string remoteHost, string serviceName, string username,
                                                 string password, int request)

    {
        ConnectionOptions theConnection = new ConnectionOptions();
        theConnection.Username = username;
        theConnection.Password = password;
        ManagementScope theScope = new ManagementScope(string.Format("\\\\{0}\\root\\cimv2", remoteHost), theConnection);
        using (ManagementObject theClass = new ManagementObject(theScope, new ManagementPath("Win32_Service"),
                                                           new ObjectGetOptions())) // causes an ArgumentOutOfRangeException (Parametername: path)
        {
            using (ManagementBaseObject inParams = theClass.GetMethodParameters("UserControlService"))
            {
                inParams["ControlCode"] = (Byte)request;

                ManagementBaseObject outParams = theClass.InvokeMethod("UserControlService", inParams, null);
                return outParams["ReturnValue"].ToString();
            }
        }
    }

引发System.Management.ManagementException抱怨无效参数（请求150，这应该有效）。在theClass.InvokeMethod上抛出异常我不确定为什么会发生这种情况，我从以下方法获得方法的描述：

http://msdn.microsoft.com/en-us/library/aa393952(v=vs.85).aspx

编辑：Hans Passant更正的工作版本：

  public static bool SendServiceControlRequest(string remoteHost, string serviceName, string username,
                                                 string password, int request)

    {
        ConnectionOptions theConnection = new ConnectionOptions();
        theConnection.Username = username;
        theConnection.Password = password;
        ManagementScope theScope = new ManagementScope(string.Format("\\\\{0}\\root\\cimv2", remoteHost),
                                                          theConnection);
        string servicePath = string.Format("Win32_Service.Name='{0}'", serviceName);
        ManagementPath path = new ManagementPath(servicePath);
        using (ManagementObject theClass = new ManagementObject(theScope, path,
                                                           new ObjectGetOptions()))
        {
            using (ManagementBaseObject inParams = theClass.GetMethodParameters("UserControlService"))
            {
                inParams["ControlCode"] = (Byte)request;

                ManagementBaseObject outParams = theClass.InvokeMethod("UserControlService", inParams, null);
                return outParams["ReturnValue"].ToString() == "0";
            }
        }
    }

Answer 1

而不是

inParams["ControlCode"] = (Byte)request;

尝试

inParams.SetPropertyValue("ControlCode", (Byte)request);

修改

未经测试，但这似乎是您可能正在寻找的：

而不是

using (ManagementBaseObject inParams = theClass.GetMethodParameters("UserControlService")) { inParams["ControlCode"] = (Byte)request; ManagementBaseObject outParams = theClass.InvokeMethod("UserControlService", inParams, null); return outParams["ReturnValue"].ToString(); }

尝试使用ManagementClass实例（来自http://social.msdn.microsoft.com/Forums/vstudio/en-US/1dbe4995-ce73-4f01-8d9a-6cf1650bce8a/wmi-c-managementclassinvokemethod-failure）：

foreach (var instance in theClass.GetInstances()) { using (ManagementBaseObject inParams = instance.GetMethodParameters("UserControlService")) { inParams["ControlCode"] = (Byte)request; ManagementBaseObject outParams = instance.InvokeMethod("UserControlService", inParams, null); return outParams["ReturnValue"].ToString(); } }

Answer 2

是的，您的代码中存在错误。您正确地向方法添加了 serviceName 参数，但是您忘记了实际使用它。这很重要，你真的必须具体说明你将这个控制代码发送到哪个特定服务。

让它看起来像这样：

  var path = string.Format("Win32_Service.Name='{0}'", serviceName);
  var thePath = new ManagementPath(path);
  var theClass = new ManagementObject(theScope, thePath, null);
  // etc...

调用Win32_Service UserControlService无法正常工作

2 个答案: