C# 4 and .NET 4

Monitoring and Controlling Windows services ❘ 691
}
{
MessageBox.Show(ex.Message, "Timout Service Controller",
MessageBoxButton.OK, MessageBoxImage.Error);
}
catch (InvalidOperationException ex)
{
MessageBox.Show(String.Format("{0} {1}", ex.Message,
ex.InnerException != null ex.InnerException.Message :
String.Empty),
MessageBoxButton.OK, MessageBoxImage.Error);
}
finally
{
this.Cursor = oldCursor;
}
protected void OnExit(object sender, RoutedEventArgs e)
{
Application.Current.Shutdown();
}
protected void OnRefresh_Click(object sender, RoutedEventArgs e)
{
RefreshServiceList();
}
code snippet ServiceControl/ServiceControlWindow.xaml.cs
Because the action of controlling the services can take some time, the cursor is switched to the wait
cursor in the first statement. Then a ServiceController method is called depending on the pressed
button. With the WaitForStatus() method, you are waiting to check that the service changes the status
to the requested value, but you only wait 10 seconds maximum. After this time, the information in the
ListBox is refreshed, and the same service as before is selected. The new status of this service is then
displayed.
Because the application requires administrative privileges, as most services require that for starting and
stopping, an application manifest with the requestedExecutionLevel set to requireAdministrator is
added to the project:
Figure 25-14 shows the completed, running application.
code snippet ServiceControl/app.manifest
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