private void dataGridView1_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
 {
     patID.Text = dataGridView1.CurrentCell.Value.ToString();
     selectClass.selectConImage(patID.Text, pictureBox1);
     if (e.RowIndex >= 0)
     {
         DataGridViewRow row = this.dataGridView1.Rows[e.RowIndex];
         textBox3.Text = row.Cells[4].Value.ToString();
         textBox1.Text = row.Cells[5].Value.ToString();
         textBox2.Text = row.Cells[6].Value.ToString();
     }
 }