如果LINQ中的列为空，如何忽略“ where”和“ order by”条件

您只需要修改

OrderBy

ThenBy

.OrderBy(t => t.Award == null || t.Award.ContractNumber == null).ThenBy(t => t.Award == null ? "" : ToSafeString(t.Award.ContractNumber)).ThenBy(t => t.PurchaseRequisition == null ? ""   : ToSafeString(t.PurchaseRequisition.RequisitionedBy.FullName));

现在，您可以完全删除该

Where