Datagridview keypress

private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                //add column to datagridvew
                dataGridView1.Columns.Add("", "C1");
                dataGridView1.Columns.Add("", "C2");


                //filling datagridview
                SqlConnection con = new SqlConnection("Data Source=.\\sqlexpress; Initial Catalog=samflin; ;Integrated Security=True;");
                SqlDataAdapter da = new SqlDataAdapter("select * from mytable", con);
                DataSet ds = new DataSet();
                da.Fill(ds, "Emp");
                int row = ds.Tables["Emp"].Rows.Count - 1;
                for (int r = 0; r <= row; r++)
                {
                    dataGridView1.Rows.Add();
                    dataGridView1.Rows[r].Cells[0].Value = ds.Tables["Emp"].Rows[r].ItemArray[0];
                    dataGridView1.Rows[r].Cells[1].Value = ds.Tables["Emp"].Rows[r].ItemArray[1];
                }
            }
            catch (Exception ms) { }
        }

        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            textBox1.Text = dataGridView1.CurrentRow.Cells[0].Value.ToString();
        }

        private void dataGridView1_KeyPress(object sender, KeyPressEventArgs e)
        {
            textBox1.Text = dataGridView1.CurrentRow.Cells[0].Value.ToString();
        }

        private void dataGridView1_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Down)
            {
                textBox1.Text = dataGridView1.CurrentRow.Cells[0].Value.ToString();
            }
        }



you can also see the attached file.
hope this can help you.