CODEWITHSUNDEEP
c#
I'm Hungry
I'm Hungry

Reputation: 201

Alternative to exiting environment while messagebox is open

Example: Once I display a messagebox, I'd like to call into a function to automatically exit the environment AFTER 5 seconds of the messagebox being displayed.

Is there a better approach towards doing so other than using a timer (starting the timer before the messagebox is displayed)?

Thanks

Upvotes: 0

Views: 41

Answers (1)

Kirill Shlenskiy
Kirill Shlenskiy

Reputation: 9587

Using a timer is definitely a valid solution in this case, but you can also leverage Tasks and async/await in order to gain more control over the execution flow. Here's a Task-based implementation which calls Environment.Exit(0) after the predefined time interval, or immediately after the user dismisses the message box:

static void ShowMessageBoxAndExit(string text, TimeSpan exitAfter)
{
    using (CancellationTokenSource cts = new CancellationTokenSource())
    {
        Func<Task> exitTaskFactory = async () =>
        {
            try
            {
                await Task.Delay(exitAfter, cts.Token).ConfigureAwait(false);
            }
            catch (OperationCanceledException)
            {
                // Expected if the user dismisses the
                // message box before the wait is completed.
            }
            finally
            {
                Environment.Exit(0);
            }
        };

        // Start the task.
        Task exitTask = exitTaskFactory();

        MessageBox.Show(text);

        // Cancel the wait if the user dismisses the
        // message box before our delay time elapses.
        cts.Cancel();

        // We don't want the user to be able to perform any more UI work,
        // so we'll deliberately block the current thread until our exitTask
        // completes. This also propagates task exceptions (if any).
        exitTask.GetAwaiter().GetResult();
    }
}

Upvotes: 1

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