/// <summary>
 /// Handles the Click event of the btnNewStaff control.
 /// </summary>
 /// <param name="sender">The source of the event.</param>
 /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
 private void btnNewStaff_Click(object sender, EventArgs e)
 {
     StaffForm staffForm = new StaffForm();
     ((IDialogForm)staffForm).RegisterCaller(this);
     staffForm.ShowDialog();
 }
        /// <summary>
        /// Shows the staff add edit form.
        /// </summary>
        /// <param name="rowIndex">Index of the row.</param>
        private void ShowStaffAddEditForm(int rowIndex)
        {
            if (rowIndex > -1)
            {
                int staffId = Convert.ToInt32(dgStaffList.Rows[rowIndex].Cells[COLUMN_INDEX_STAFFID].Value);

                StaffForm staffForm = new StaffForm();
                ((IDialogForm)staffForm).RegisterCaller(this);
                staffForm.StaffId = staffId;
                staffForm.ShowDialog();
            }
        }