Delay between key pressing in C#

Question

I've got a method, that searches some data in DataGridView on KeyPress event and then focuses a row where input string was found (if is found).

private string input;
    private void Find_Matches()
    {            
        if (input.Length == 0) return;

        for (int x = 0; x < dataGridViewCustomers.Rows.Count; x++)
            for (int y = 0; y < dataGridViewCustomers.Columns.Count; y++)
                if (dataGridViewCustomers.Rows[x].Cells[y].Value.ToString().Contains(input))
                    dataGridViewCustomers.Rows[x].Selected = true;

     }

private void dataGridViewCustomers_KeyPress(object sender, KeyPressEventArgs e)
    {            
        input += e.KeyChar.ToString();
        Find_Matches();
    }

How to count a delay between keys pressings and, if it is more than 1 second, clear the "input" string? It's necessary for uninterrupted searching.

Thanks.

Answer 1

leveraging System.Timers.Timer it's done like this:

private Timer myTimer = new Timer(1000); //using System.Timers, 1000 means 1000 msec = 1 sec interval

public YourClassConstructor()
{
    myTimer.Elapsed += TimerElapsed;
}

private void TimerElapsed(object sender, EventArgs e)
{
    input = string.Empty;
    myTimer.Stop();
}

// this is your handler for KeyPress, which will be edited
private void dataGridViewCustomers_KeyPress(object sender, KeyPressEventArgs e)
{            
    if (myTimer.Enabled) myTimer.Stop(); // interval needs to be reset
    input += e.KeyChar.ToString();
    Find_Matches();
    myTimer.Start(); //in 1 sec, "input" will be cleared
}