Winform Datagridview 点击headercolumn排序

/// <summary>
/// 排序顺序
/// </summary>
bool asc;

/// <summary>
        /// Dgv点击排序
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void dgv_Jobs_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            int index = e.ColumnIndex;
            if (asc)
            {
                switch (index)
                {
                    case 1:
                        listStaffs = listStaffs.OrderByDescending(w => w.Age).ToList();
                        break;
                    case 3:
                        listStaffs = listStaffs.OrderByDescending(w => w.Wage).ToList();
                        break;
                    case 4:
                        listStaffs = listStaffs.OrderByDescending(w => w.MainAblity).ToList();
                        break;
                    case 5:
                        listStaffs = listStaffs.OrderByDescending(w => w.AssistantAbility).ToList();
                        break;
                    case 6:
                        listStaffs = listStaffs.OrderByDescending(w => w.LearningAbility).ToList();
                        break;
                    case 7:
                        listStaffs = listStaffs.OrderByDescending(w => w.Greed).ToList();
                        break;
                    case 8:
                        listStaffs = listStaffs.OrderByDescending(w => w.Attitude).ToList();
                        break;
                }
                asc = false;
            }
            else
            {
                switch (index)
                {
                    case 1:
                        listStaffs = listStaffs.OrderBy(w => w.Age).ToList();
                        break;
                    case 3:
                        listStaffs = listStaffs.OrderBy(w => w.Wage).ToList();
                        break;
                    case 4:
                        listStaffs = listStaffs.OrderBy(w => w.MainAblity).ToList();
                        break;
                    case 5:
                        listStaffs = listStaffs.OrderBy(w => w.AssistantAbility).ToList();
                        break;
                    case 6:
                        listStaffs = listStaffs.OrderBy(w => w.LearningAbility).ToList();
                        break;
                    case 7:
                        listStaffs = listStaffs.OrderBy(w => w.Greed).ToList();
                        break;
                    case 8:
                        listStaffs = listStaffs.OrderBy(w => w.Attitude).ToList();
                        break;
                }
                asc = true;
            }
            dgv_Jobs.DataSource = listStaffs;
        }