Question

我编写了一个Windows服务，它将WCF服务公开给安装在同一台机器上的GUI。当我运行GUI时，如果我无法连接到该服务，我需要知道是否因为尚未安装服务应用程序，或者是因为服务未运行。如果是前者，我会想要安装它（如here所述）;如果是后者，我会想要启动它。

问题是：如何检测服务是否已安装，然后检测到它已安装，如何启动它？

Answer 1

使用：

// 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);

Answer 2

您也可以使用以下内容..

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

Answer 3

实际上像这样循环：

foreach (ServiceController SC in ServiceController.GetServices())

如果运行应用程序的帐户无权查看服务属性，则

可能会抛出Access Denied异常。另一方面，即使没有具有此类名称的服务，您也可以安全地执行此操作：

ServiceController SC = new ServiceController("AnyServiceName");

但是如果服务不存在则访问其属性将导致InvalidOperationException。所以这是检查服务是否安装的安全方法：

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();
}

Answer 4

对于非linq，你可以像这样迭代数组：

using System.ServiceProcess;

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

Answer 5

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

Answer 6

我认为这是这个问题的最佳答案。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则会抛出异常。你只需抓住它。如果将整个方法包装在using（）中，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       
 }     
}

如何检查C＃中是否安装了Windows服务

6 个答案: