C# 如何将以下函数/表达式从SQL转换为LINQ，再转换为实体？

在哪里

Dateadd(minute, TS.duration, TS.datesched) 

在哪里

TS.Duration = int.
TS.datesched = datetime.

RTRIM(ISNULL(TC.CityLocation, '') + ' ' + ISNULL(TC.StateLocation, '')

TC.CityLocation = varchar(50)
TC.StateLocation = varchar(10)

CASE
WHEN country = market 
OR country = 'USA' THEN market 
ELSE country + ' | ' + market 
END AS BroadcastMarket

Country = varchar(100)
Market = varchar(100)

CASE 
WHEN country = 'USA' THEN 0 
ELSE 1 
END AS CountrySort

在哪里

TS.Duration = int.
TS.datesched = datetime.

RTRIM(ISNULL(TC.CityLocation, '') + ' ' + ISNULL(TC.StateLocation, '')

TC.CityLocation = varchar(50)
TC.StateLocation = varchar(10)

CASE
WHEN country = market 
OR country = 'USA' THEN market 
ELSE country + ' | ' + market 
END AS BroadcastMarket

Country = varchar(100)
Market = varchar(100)

CASE 
WHEN country = 'USA' THEN 0 
ELSE 1 
END AS CountrySort

在哪里

TS.Duration = int.
TS.datesched = datetime.

RTRIM(ISNULL(TC.CityLocation, '') + ' ' + ISNULL(TC.StateLocation, '')

TC.CityLocation = varchar(50)
TC.StateLocation = varchar(10)

CASE
WHEN country = market 
OR country = 'USA' THEN market 
ELSE country + ' | ' + market 
END AS BroadcastMarket

Country = varchar(100)
Market = varchar(100)

CASE 
WHEN country = 'USA' THEN 0 
ELSE 1 
END AS CountrySort

---

选择中的一个案例将在LINQ的投影中完成。您可以使用一个多行匿名方法，这样您就可以使用if/else语句，但这里我只展示了使用三元运算符

Country = varchar(100)

变成：

CASE 
WHEN country = 'USA' THEN 0 
ELSE 1 
END AS CountrySort

---

我要试试这个。基本上你要找的是一个投影

tcollection

是您的数据集

.Select(c=> new { countrySort = (c.country == "USA" ? 0 : 1)});

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您必须使用实体函数进行日期操作，如LINQ中的AddDays、AddMinutes。请参阅，感谢Sandy提供了我最初错过的日期部分。