我有一种情况,例如,我必须计算两个值的百分比
IEnumerable<RenewalModel> result =
from r in renewalLists
group r by r.CityID into grpCity
select new RenewalModel
{
CityID = grpCity.Key,
City = (from g in grpCity where g.CityID == grpCity.Key select g.City).First().Trim(),
PotentialRenewalCount = (from g in grpCity where g.CityID == grpCity.Key select g.PotentialRenewalCount).Sum(),
PotentialRenewalSQRT = (from g in grpCity where g.CityID == grpCity.Key select g.PotentialRenewalSQRT).Sum(),
desiredCalucation= (PotentialRenewalCount/PotentialRenewalCount)*100,
RENEWALCOUNT = (from g in grpCity where g.CityID == grpCity.Key select g.RENEWALCOUNT).Sum(),
RENEWALSQRT = (from g in grpCity where g.CityID == grpCity.Key select g.RENEWALSQRT).Sum()
};
我的计算应该是这样的
(可能更新数/可能更新数)* 100
正如我在select语句中描述的那样。
我什至尝试了此查询,但结果为0
IEnumerable<RenewalModel> result =
(from r in renewalLists
group r by r.CityID into grpCity
select new RenewalModel
{
CityID = grpCity.Key,
City = (from g in grpCity where g.CityID == grpCity.Key select g.City).First().Trim(),
PotentialRenewalCount = (from g in grpCity where g.CityID == grpCity.Key select g.PotentialRenewalCount).Sum(),
PotentialRenewalSQRT = (from g in grpCity where g.CityID == grpCity.Key select g.PotentialRenewalSQRT).Sum(),
RENEWALCOUNT = (from g in grpCity where g.CityID == grpCity.Key select g.RENEWALCOUNT).Sum(),
RENEWALSQRT = (from g in grpCity where g.CityID == grpCity.Key select g.RENEWALSQRT).Sum()
}).select(r => new RenewalModel
{
desiredCalucation = (r.PotentialRenewalCount / r.PotentialRenewalCount) * 100,
CityID = r.CityID,
City = r.City,
PotentialRenewalCount = r.PotentialRenewalCount,
PotentialRenewalSQRT = r.PotentialRenewalSQRT,
RENEWALCOUNT = r.RENEWALCOUNT,
RENEWALSQRT = r.RENEWALSQRT
});
由于某种原因或另一个desireCalucation变量给我0作为结果。
任何帮助表示赞赏。谢谢
为此,请使用LINQ let运算符。
通常,我建议将大型LINQ语句拆分为几个较小的语句。否则,稍后进行调试将非常痛苦。
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