private void dataGridView1_CellClick(object sender, EventArgs e)
{
int i;
i = dataGridView1.SelectedCells[0].RowIndex;
txtbox1.Text = dataGridView1.Rows[i].Cells[0].Value.ToString();
txtbox2.Text = dataGridView1.Rows[i].Cells[1].Value.ToString();
}
Thanks