Question

任何人都可以帮我解决这个SQL查询如何在LINQ中编写

SELECT FGA_Vin.vin,
FROM FGA_Vin INNER JOIN Info_Global 
ON  FGA_Vin.Vin='XXXXXXXXXX' AND
    FGA_Vin.NHard=dbo.Info_Global.NHard AND
    Info_Global.NVerHard like '%'+FGA_Vin.NVerHard and
    Info_Global.NVerSoft like '%'+FGA_Vin.NVerSoft
inner join Info_Associa
on Info_Associa.KeyJoined = Info_Global.NomeFile

我试过了

var reportdata =    from Vin in FGA_Vin 
                                join Global in Info_Globals 
                                on Vin.NHard equals Global.NHard 
                                && on Global.NVerHard equals Vin.NVerHard

                                select new XElement("flash",
                                    new XElement("Vin", Vin.Vin),
                                    new XElement("ModelType", Global.Model_Type)
                                );

但是当我添加＆＃34;＆amp;＆amp;在Global.NVerHard上等于Vin.NVerHard＆＃34;然后它都是红色的。

如果＆amp;＆amp;和＆amp;＆amp;没有回复

由于

Answer 1

也许是这样的：

var result= 
    (
        from v in db.FGA_Vin
        from i in db.Info_Global
            .Where(w=>
                w.NHard==v.NHard &&
                w.NVerHard.Contains(v.NVerHard) &&
                w.NVerSoft.Contains(v.NVerSoft)
            )
        join ia in db.Info_Associa
            on i.NomeFile equals ia.KeyJoined
        where v.Vin=="XXXXXXXXXX"
        select v.vin
    ).ToList();

其中db是linq数据上下文

Answer 2

var reportdata =    
                (from Vin in FGA_Vin 
                join Global in Info_Globals on new {Vin.NHard, Vin.NVerHard } equals {Global.NHard, Global.NVerHard }
                join Info_Associa on Info_Global.NomeFile equals Info_Associa.KeyJoined
                where Info_Global.NVerHard.Contains(FGA_Vin.NVerHard)
                where Info_Global.NVerSoft.Contains(FGA_Vin.NVerSoft)
                select new XElement("flash",
                    new XElement("Vin", Vin.Vin),
                    new XElement("ModelType", Global.Model_Type)
                );

Answer 3

尝试这样的事情： -

var result =
    (
        db.FGA_Vin.SelectMany(v => db.Info_Global
            .Where(w =>
                w.NHard == v.NHard &&
                w.NVerHard.Contains(v.NVerHard) &&
                w.NVerSoft.Contains(v.NVerSoft)
            ), (v, i) => new {v, i})
            .Join(db.Info_Associa, @t => i.NomeFile, ia => ia.KeyJoined, (@t, ia) => new {@t, ia})
            .Where(@t => v.Vin == "XXXXXXXXXX")
            .Select(@t => v.vin)
        ).ToList();

Linq查询使用join

3 个答案: