C#

asterix5 wrote:

Nothing happens on pressing the button.

bool isPressed = false;
        BackgroundWorker bgw = new BackgroundWorker();//declare form level worker

        public Form1()
        {
            InitializeComponent();
            button1.MouseDown += new MouseEventHandler(button1_MouseDown);//add mouse down event handler
            button1.MouseUp += new MouseEventHandler(button1_MouseUp);//add mouse up event handler
            bgw.DoWork+=new DoWorkEventHandler(bgw_DoWork);//add handler for bg worker Do Work
            bgw.WorkerSupportsCancellation = true;//ensure you can cancel bg worker
        }

        //This is where bg worker does it's thing
        void  bgw_DoWork(object sender, DoWorkEventArgs e)
        {
            while (isPressed)
            {
                DoWork();//add a to textbox
                Thread.Sleep(1000);//sleep for a second
            }
        }

        void button1_MouseUp(object sender, MouseEventArgs e)
        {
            bgw.CancelAsync();//stop bg worker
            isPressed = false;//set isPressed to false for next time
        }

        void button1_MouseDown(object sender, MouseEventArgs e)
        {
            isPressed = true;//set trigger to true
            bgw.RunWorkerAsync();
        }

        //create delegate for multi task control update
        delegate void doWork();
        void DoWork()
        {
            if (this.InvokeRequired)
            {
                doWork d = new doWork(DoWork);
                this.Invoke(d);
            }
            else
            {
                this.textBox1.Text += "a";
            }
        }

c4tchm4tt wrote:

For some reason the Private bytes of the app are rising in small but constant increments each time each thread wakes up, and I can't see what I can do to make sure there's nothing hanging around in memory so that I can leave the programme unattended.