private void dataGridView1_CellContentClick_1(object sender, DataGridViewCellEventArgs e)
{
DataGridViewRow row = this.dataGridView1.Rows[e.RowIndex];
textBox1.Text = row.Cells[0].Value.ToString();
{
DataGridViewRow row = this.dataGridView1.Rows[e.RowIndex];
textBox1.Text = row.Cells[0].Value.ToString();