How to open desktop application from windows service application, once receive the SignalR result

Question

I am currently working on a windows service application that already consuming SignalR service. My new requirement is to start a desktop application when windows service receives a notification from SignalR.

While I am google on how to start a desktop application using windows service, I found this code base and I am currently using it.

As it explains, when I called the bellow method

ProcessExtensions.StartProcessAsCurrentUser(string path);

in the windows service's OnStart method I was able to start the desktop application.

I also have SignalR client in this windows service (Bellow code).

    public class NotificationHub
    {
        public static void ConsumeNotification()
        {
            try
            {
                var hubConnection = new HubConnection(url);
                IHubProxy notificationHubHubProxy = hubConnection.CreateHubProxy("WSMassageHub");

                hubConnection.Start().Wait();
                notificationHubHubProxy.On<WSMessage>("SendMessage", (message) => {

                    // try to start from here 
                    // but it gives error
                    ProcessExtensions.StartProcessAsCurrentUser(@"D:\Application\Application.exe");
                });
            }
            catch (Exception ex)
            {
                logger.Error("Message: " + ex.Message + " | Stack Trace: " + ex.StackTrace);
            }
        }
    }

Then I try to start the desktop application from windows service when windows service gets the message to SignalR client.

protected override async void OnStart(string[] args)
{
            NotificationHub.ConsumeNotification();
}

Once SignalR client gets a message, the application failed and error log gets this error message.

StartProcessAsCurrentUser: CreateProcessAsUser failed.  Error Code -2

According to System Error Codes, it says that The system cannot find the file specified.

Also, I suspect that this will explain the issue in here. But I don't understand that which component needs to implement to start the desktop application, once SignalR client receives the notification. So, can someone please give me help hand to overcome this issue.

Thanks in advance.

Are you sure the file `D:\Application\Application.exe` exist? — mr5, Jul 18 '18 at 05:50
Have you tried to use other function to execute external application as [mentioned from here](https://stackoverflow.com/a/5278705/2304737)? — mr5, Jul 18 '18 at 06:06
[Similar issue](https://stackoverflow.com/q/3173775/2304737) — mr5, Jul 18 '18 at 06:16
Tried. But not working. I assume the issue in here that I am trying to start an application within SIgnalR client? — NoughT, Jul 18 '18 at 07:02
How about get a handle to your path through file and check if it exists? — mr5, Jul 18 '18 at 07:41
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/176229/discussion-between-nought-and-mr5). — NoughT, Jul 18 '18 at 08:14

How to open desktop application from windows service application, once receive the SignalR result

0 Answers0