C# 按条件降序排列
我想写一个LINQ to Entity查询,它根据输入参数按升序或降序排序,有什么方法吗。 下面是我的代码。请建议C# 按条件降序排列,c#,asp.net,linq,linq-to-sql,linq-to-entities,C#,Asp.net,Linq,Linq To Sql,Linq To Entities,我想写一个LINQ to Entity查询,它根据输入参数按升序或降序排序,有什么方法吗。 下面是我的代码。请建议 public List<Hosters_HostingProviderDetail> GetPendingApproval(SortOrder sortOrder) { List<Hosters_HostingProviderDetail> returnList = new List<Hosters_HostingPro
public List<Hosters_HostingProviderDetail> GetPendingApproval(SortOrder sortOrder)
{
List<Hosters_HostingProviderDetail> returnList = new List<Hosters_HostingProviderDetail>();
int pendingStateId = Convert.ToInt32(State.Pending);
//If the sort order is ascending
if (sortOrder == SortOrder.ASC)
{
var hosters = from e in context.Hosters_HostingProviderDetail
where e.ActiveStatusID == pendingStateId
orderby e.HostingProviderName ascending
select e;
returnList = hosters.ToList<Hosters_HostingProviderDetail>();
return returnList;
}
else
{
var hosters = from e in context.Hosters_HostingProviderDetail
where e.StateID == pendingStateId
orderby e.HostingProviderName descending
select e;
returnList = hosters.ToList<Hosters_HostingProviderDetail>();
return returnList;
}
}
public List GetPendingApproval(排序器排序器排序器)
{
List returnList=新列表();
int pendingStateId=Convert.ToInt32(State.Pending);
//如果排序顺序是升序
if(sortOrder==sortOrder.ASC)
{
var hosters=来自context.hosters\u HostingProviderDetail中的e
其中e.ActiveStatusID==pendingStateId
orderby e.HostingProviderName升序
选择e;
returnList=hosters.ToList();
退货清单;
}
其他的
{
var hosters=来自context.hosters\u HostingProviderDetail中的e
其中e.StateID==pendingStateId
orderby e.HostingProviderName降序
选择e;
returnList=hosters.ToList();
退货清单;
}
}
我不认为可以将条件放入更大的查询中,但可以将其分离到另一个C#语句中,如下所示:
// Common code:
var hosters = from e in context.Hosters_HostingProviderDetail
where e.ActiveStatusID == pendingStateId;
// The difference between ASC and DESC:
hosters = (sortOrder == SortOrder.ASC ? hosters.OrderBy(e => e.HostingProviderName) : hosters.OrderByDescending(e => e.HostingProviderName));
// More common code:
returnList = hosters.ToList<Hosters_HostingProviderDetail>();
//通用代码:
var hosters=来自context.hosters\u HostingProviderDetail中的e
其中e.ActiveStatusID==pendingStateId;
//ASC和DESC之间的区别:
hosters=(sortOrder==sortOrder.ASC?hosters.OrderBy(e=>e.HostingProviderName):hosters.OrderByDescending(e=>e.HostingProviderName));
//更常见的代码:
returnList=hosters.ToList();
您可以使用
var hosters = from e in context.Hosters_HostingProviderDetail
where e.ActiveStatusID == pendingStateId
select e;
if (sortOrder == SortOrder.ASC)
hosters = hosters.OrderBy(e => e.HostingProviderName);
else
hosters = hosters.OrderByDescending(e => e.HostingProviderName);
return hosters.ToList<Hosters_HostingProviderDetail>();
var hosters=来自context.hosters\u HostingProviderDetail中的e
其中e.ActiveStatusID==pendingStateId
选择e;
if(sortOrder==sortOrder.ASC)
hosters=hosters.OrderBy(e=>e.HostingProviderName);
其他的
hosters=hosters.OrderByDescending(e=>e.HostingProviderName);
返回hosters.ToList();