private void btnFormatData_Click(object sender, EventArgs e)
        {
            foreach (DataGridViewRow row in dgvTransmission.SelectedRows)
            {
                TElement_Constant selectedTE = row.DataBoundItem as TElement_Constant; //gets the selected element

                if (selectedTE != null)                                                //not sure if this is necessary
                {
                    using (var form = new CharEntry(selectedTE))
                    {
                        form.ShowDialog();
                        this.UpdateTransDGV();
                    }
                }
            }
        }