private void ShowAllSupplierOrderData()
 {
     try
     {
         dataGridViewOrders.Rows.Clear();
         var orders = SupplierOrderDataAccess.GetAllSupplierOrders();
         foreach (var order in orders)
         {
             int             rowId = dataGridViewOrders.Rows.Add();
             DataGridViewRow row   = dataGridViewOrders.Rows[rowId];
             row.Cells["OrderId"].Value    = order.Id;
             row.Cells["SupplierId"].Value = order.Supplier.Id;
             row.Cells["Username"].Value   = order.Supplier.Username;
             row.Cells["OrderDate"].Value  = order.Order_Date.ToString("yyyy-MM-dd hh:mm:ss");
             row.Cells["Amount"].Value     = order.Amount;
             row.Cells["Status"].Value     = order.Status;
             row.Cells["IsNew"].Value      = order.Is_New ? "是" : "否";
         }
     }
     catch (Exception ex)
     {
         MessageBox.Show("刷新失败\n" + ex.Message);
     }
 }