CREATE TABLE [MyNames]
(
    [ID] INT IDENTITY PRIMARY KEY,
    [Name] NVARCHAR(255) NULL
)

INSERT INTO [MyNames] VALUES ('John')
INSERT INTO [MyNames] VALUES ('Jane')
INSERT INTO [MyNames] VALUES ('Peter')
INSERT INTO [MyNames] VALUES ('Montgomery')
INSERT INTO [MyNames] VALUES ('Sarah')

基于上面的(假设的)SQL模式和数据,我想使用Linq to SQL来获取名称为数组的值中的的所有结果。
string[] names = {"John", "Cassandra", "Sarah"};

var results = (from n in db.Names
               where n.Name **in names**
               select n).ToList();

结果应包括JohnSarah。然后,利用这些信息,我可以添加需要添加的条目,在本例中为Cassandra

我不想加载所有名称,因为列表可能会非常长。

最佳答案

您可以使用names.Contains():

string[] names = {"John", "Cassandra", "Sarah"};

var results = (from n in db.Names
               where names.Contains(n.Name)
               select n).ToList();

关于c# - Linq到SQL : WHERE IN statement,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/18235409/

10-12 12:41