Firing method on interval with System.Threading.Timer in winForm C#

Question

What I want to do is to use the System.Threading.Timer to execute a method with a interval. My example code looks like this atm.

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        System.Threading.Timer t1 = new System.Threading.Timer(WriteSomething, null, TimeSpan.FromSeconds(0), TimeSpan.FromSeconds(10));

    }
    private void button1_Click(object sender, EventArgs e)
    {
        textBox1.Clear();
    }

    public void WriteSomething(object o)
    {

        textBox1.Text = "Test";
    }
}

}

Isn't this suppost to execute the WriteSomething method every 10'th second. What rly happens is that the WriteSomething is executed when I run my application and after 10 seconds the application closes. Think I have missunderstood how this works, can anyone tell me how to do this with the System.Threading.Timer.

thanks in advance, code examples are very welcome

Answer 1

The more likely scenario is that it crashes after 10 seconds. You cannot touch any controls in the callback, it runs on the wrong thread. You'd have to use Control.BeginInvoke(). Which makes it utterly pointless to use a System.Threading.Timer instead of a System.Windows.Forms.Timer.

Be practical. Make it 100 milliseconds so you don't grow a beard waiting for the crash. And don't use an asynchronous timer to update the UI, it is useless.