C# 4 and .NET 4

688 ❘ ChaPTer 25 windOws services
}
}
return controller.Status == ServiceControllerStatus.Running;
public bool EnablePause
{
get
{
return controller.Status == ServiceControllerStatus.Running &&
controller.CanPauseAndContinue;
}
}
public bool EnableContinue
{
get
{
return controller.Status == ServiceControllerStatus.Paused;
}
}
}
In the ServiceControlWindow class, the method RefreshServiceList() gets all the services using
ServiceController.GetServices() for display in the list box. The GetServices() method returns
an array of ServiceController instances representing all Windows Services installed on the operating
system. The ServiceController class also has the static method GetDevices() that returns a
ServiceController array representing all device drivers. The returned array is sorted with the help of
the generic Array.Sort() method. The sort is done by the DisplayName as is defined with the Lambda
expression that is passed to the Sort() method. Using Array.ConvertAll(), the ServiceController
instances are converted to the type ServiceControllerInfo. Here, a Lambda expression is passed
that invokes the ServiceControllerInfo constructor for every ServiceController object. Last, the
ServiceControllerInfo array is assigned to the DataContext property of the window for
data binding:
protected void RefreshServiceList()
{
ServiceController[] services = ServiceController.GetServices();
Array.Sort(services, (s1, s2) =>
s1.DisplayName.CompareTo(s2.DisplayName));
}
this.DataContext =
Array.ConvertAll(services, controller =>
new ServicesControllerInfo(controller));
code snippet ServiceControl/ServiceControlWindow.xaml.cs
The method RefreshServiceList() to get all the services in the list box is called within the constructor
of the class ServiceControlWindow. The constructor also defines the event handler for the Click event of
the buttons:
public ServiceControlWindow()
{
InitializeComponent();
}
RefreshServiceList();
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