如何检查Windows服务是否已在C＃中安装

我编写了Windows服务，将WCF服务公开给安装在同一台计算机上的GUI。在运行GUI时，如果无法连接到服务，则需要知道是由于尚未安装服务应用程序还是因为服务未运行。如果是前者，我将要安装它（如描述这里）; 如果是后者，我将要启动它。

问题是：如何检测是否已安装该服务，然后检测到已安装该服务，如何启动它？

采用：

// add a reference to System.ServiceProcess.dll
using System.ServiceProcess;

// ...
ServiceController ctl = ServiceController.GetServices()
    .FirstOrDefault(s => s.ServiceName == "myservice");
if(ctl==null)
    Console.WriteLine("Not installed");
else    
    Console.WriteLine(ctl.Status);

您也可以使用以下内容：

using System.ServiceProcess; 
... 
var serviceExists = ServiceController.GetServices().Any(s => s.ServiceName == serviceName);

实际上像这样循环：

foreach (ServiceController SC in ServiceController.GetServices())

如果运行您的应用程序所在的帐户没有查看服务属性的权限，则可能会抛出“拒绝访问”异常。另一方面，即使不存在具有该名称的服务，也可以安全地执行此操作：

ServiceController SC = new ServiceController("AnyServiceName");

但是，如果不存在服务，则访问其属性将导致InvalidOperationException。因此，这是检查服务是否已安装的安全方法：

ServiceController SC = new ServiceController("MyServiceName");
bool ServiceIsInstalled = false;
try
{
    // actually we need to try access ANY of service properties
    // at least once to trigger an exception
    // not neccessarily its name
    string ServiceName = SC.DisplayName;
    ServiceIsInstalled = true;
}
catch (InvalidOperationException) { }
finally
{
    SC.Close();
}

对于非linq，您可以像这样遍历数组：

using System.ServiceProcess;

bool serviceExists = false
foreach (ServiceController sc in ServiceController.GetServices())
{
    if (sc.ServiceName == "myServiceName")
    {
         //service is found
         serviceExists = true;
         break;
    }
}

我认为这是此问题的最佳答案。无需添加额外的处理来验证服务是否存在，因为如果服务不存在，它将引发异常。您只需要抓住它。如果将整个方法包装在using（）中，则也不需要关闭连接。

using (ServiceController sc = new ServiceController(ServiceName))
{
 try
 {
  if (sc.Status != ServiceControllerStatus.Running)
  {
    sc.Start();
    sc.WaitForStatus(ServiceControllerStatus.Running, new TimeSpan(0, 0, 10));
    //service is now Started        
  }      
  else
    //Service was already started
 }
 catch (System.ServiceProcess.TimeoutException)
 {
  //Service was stopped but could not restart (10 second timeout)
 }
 catch (InvalidOperationException)
 {
   //This Service does not exist       
 }     
}

 private bool ServiceExists(string serviceName)
    {
        ServiceController[] services = ServiceController.GetServices();
        var service = services.FirstOrDefault(s => string.Equals(s.ServiceName, serviceName, StringComparison.OrdinalIgnoreCase));
        return service != null;
    }