How to search a cell in a grid one by one when key press in c#?

for winforms
like this...
private int lastIndex;
private char lastKey;

private void dataGridView1_KeyPress(object sender, KeyPressEventArgs e)
{
if (Char.IsLetter(e.KeyChar))
{
for (int i = 0; i < (dataGridView1.Rows.Count); i++)
{
if (dataGridView1.Rows[i].Cells[0].Value.ToString().StartsWith(e.KeyChar.ToString(), true, CultureInfo.InvariantCulture))
{
if (lastKey == e.KeyChar && lastIndex < i)
{
continue;
}

lastKey = e.KeyChar;
lastIndex = i;
dataGridView1.Rows[i].Cells[0].Selected = true;
return;
}
}
}
}