C# 有没有更好的方法来缩短这个LINQ语句？ var filteredItemNumber=0； 如果（！string.IsNullOrEmpty（searchTerm）） { filteredItemNumber= 这个。请点击查找( r=> r、 ObjectTitle.StartWith（searchTerm）和&r.CreatedDate>=时间段.Start &&r.CreatedDate t.CreatedDate>=timePeriod.Start&&t.CreatedDate searchTerm==null | | r.ObjectTitle.StartsWith（searchTerm）和&r.CreatedDate>=timePeriod.Start &&r.CreatedDate

您不需要返回新列表，您可以使用LINQ进行计数：

this._objectsRep.Find(r =>
                searchTerm == null || r.ObjectTitle.StartsWith(searchTerm) && r.CreatedDate >= timePeriod.Start
                && r.CreatedDate <= timePeriod.End).Count()

int filteredItemNumber=\u objectsRep.Count（r=>
（string.IsNullOrEmpty（searchTerm）| | r.ObjectTitle.StartsWith（searchTerm））
&&r.CreatedDate>=时间段。开始
&&r.CreatedDate我认为您只需要像这样包装searchTerm条件：

int filteredItemNumber = _objectsRep.Count(r => 
    (string.IsNullOrEmpty(searchTerm) || r.ObjectTitle.StartsWith(searchTerm))
    && r.CreatedDate >= timePeriod.Start 
    && r.CreatedDate <= timePeriod.End);

this.\u objectsRep.Find（r=>
（string.IsNullOrEmpty（searchTerm）| | r.ObjectTitle.StartsWith（searchTerm））
&&r.CreatedDate>=时间段。开始
&&r.CreatedDate
filteredItemNumber=
这个。请点击查找(
r=>
r、 ObjectTitle.StartsWith（searchTerm？？？）&&r.CreatedDate>=timePeriod.Start
&&r.CreatedDate
List.Find
不是LINQ。
int filteredItemNumber = _objectsRep.Count(r => 
    (string.IsNullOrEmpty(searchTerm) || r.ObjectTitle.StartsWith(searchTerm))
    && r.CreatedDate >= timePeriod.Start 
    && r.CreatedDate <= timePeriod.End);

this._objectsRep.Find(r =>
    (string.IsNullOrEmpty(searchTerm) || r.ObjectTitle.StartsWith(searchTerm)) 
    && r.CreatedDate >= timePeriod.Start
    && r.CreatedDate <= timePeriod.End).Count()

filteredItemNumber =
                this._objectsRep.Find(
                    r =>
                    r.ObjectTitle.StartsWith(searchTerm??"") && r.CreatedDate >= timePeriod.Start
                    && r.CreatedDate <= timePeriod.End).Count();