C#•2y ago

❔ What did I do wrong with this task formation?

I want to make an infinite method that generates a random number for a "slot machine". I also have to be able to stop it upon click of a button to finalize a number. The vital code is this:

        public async Task Numbers(TextBox textbox, CancellationToken token)
        {
            Random rnd = new Random();
            while (token.IsCancellationRequested == false)
            {
                textbox.Text = rnd.Next(1, 10).ToString();
                await Task.Delay(100);
            }
        }

        public async void Check(TextBox textbox, Button button)
        {
            CancellationTokenSource cts = new CancellationTokenSource();
            if (button.Text == "Launch")
            {
                Task.Run(() => Numbers(textbox, cts.Token), cts.Token);
                button.Text = "Stop";
            }
            else if (button.Text == "Stop")
            {
                cts.Cancel();
                button.Text = "Launch";
            }
        }

        public async Task Numbers(TextBox textbox, CancellationToken token)
        {
            Random rnd = new Random();
            while (token.IsCancellationRequested == false)
            {
                textbox.Text = rnd.Next(1, 10).ToString();
                await Task.Delay(100);
            }
        }

        public async void Check(TextBox textbox, Button button)
        {
            CancellationTokenSource cts = new CancellationTokenSource();
            if (button.Text == "Launch")
            {
                Task.Run(() => Numbers(textbox, cts.Token), cts.Token);
                button.Text = "Stop";
            }
            else if (button.Text == "Stop")
            {
                cts.Cancel();
                button.Text = "Launch";
            }
        }

4 Replies

valera456OP•2y ago

the function Numbers() doesnt work when a part of task. if i put it as is it works. what am i supposed to do then i repurposed it to

       CancellationTokenSource cts1 = new CancellationTokenSource();
        CancellationTokenSource cts2 = new CancellationTokenSource();
        CancellationTokenSource cts3 = new CancellationTokenSource();
        public async Task Numbers(TextBox textbox, CancellationToken token)
        {
            Random rnd = new Random();
            while (token.IsCancellationRequested==false)
            {
                textbox.Text = rnd.Next(1, 10).ToString();
                await Task.Delay(100);
            }
        }
        public async void Check(TextBox textbox, Button button, CancellationTokenSource cts)
        {
            if (button.Text=="Пуск")
            {
                var task = Task.Run(()=>Numbers(textbox, cts.Token),cts.Token);
                button.Text = "Стоп";   
            }
            else if (button.Text=="Стоп")
            {
                cts.Cancel();
                button.Text = "Пуск"; 
            }
            if (button1.Text=="Пуск" && button2.Text == "Пуск" && button3.Text == "Пуск")
            {
                textBox1.Text = Determine(textBox2, textBox3, textBox4);
            }
        }
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Check(textBox2, button1, cts1);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Check(textBox3, button2, cts2);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Check(textBox4, button3, cts3);
        }

       CancellationTokenSource cts1 = new CancellationTokenSource();
        CancellationTokenSource cts2 = new CancellationTokenSource();
        CancellationTokenSource cts3 = new CancellationTokenSource();
        public async Task Numbers(TextBox textbox, CancellationToken token)
        {
            Random rnd = new Random();
            while (token.IsCancellationRequested==false)
            {
                textbox.Text = rnd.Next(1, 10).ToString();
                await Task.Delay(100);
            }
        }
        public async void Check(TextBox textbox, Button button, CancellationTokenSource cts)
        {
            if (button.Text=="Пуск")
            {
                var task = Task.Run(()=>Numbers(textbox, cts.Token),cts.Token);
                button.Text = "Стоп";   
            }
            else if (button.Text=="Стоп")
            {
                cts.Cancel();
                button.Text = "Пуск"; 
            }
            if (button1.Text=="Пуск" && button2.Text == "Пуск" && button3.Text == "Пуск")
            {
                textBox1.Text = Determine(textBox2, textBox3, textBox4);
            }
        }
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Check(textBox2, button1, cts1);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Check(textBox3, button2, cts2);
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Check(textBox4, button3, cts3);
        }

It still does not display any numbers on initial press. i dont know? lemme see i did

if (task.Status==TaskStatus.Running)
                {
                    MessageBox.Show("Yes");
                }

if (task.Status==TaskStatus.Running)
                {
                    MessageBox.Show("Yes");
                }

its not showing anything so its not running but when i try to do task.Start() it says that its running on promise-style so when does it run? what do i check for exactly? in the locals or? yes it does stop at the breakpoint. and it does get deeper into the actual number set of a textbox. the application does not reflect that for some reason

valera456OP•2y ago

by that i mean that no numbers are showing (they are showing if i call numbers() without the task)

valera456OP•2y ago

so i have to out an int for that? its now working correctly! thanks

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ What did I do wrong with this task formation?