linq查询，将sql查询转换为linq for VB.net

Question

我试图从一个表中获取字段并从另一个表中获取max（expirationDate）。这是我原来的LINQ查询：

      tanks = (From t In db.Table1 _ 
          Where t.CompanyID = txtCompanyID.Text.Trim() _ 
          Join d In db.Table2 On t.TankID Equals d.TankID 
          Order By d.ExpireDate Descending 
          Select t).ToList 

带来回多expireDates，我只希望最大（EXPIREDATE）为每个记录

下面的SQL查询的工作，我只是需要把它放到一个LINQ查询

select t1.*, 
(Select MAX(Table2.ExpireDate) 
from Table2 as t2 
where t2.TankID = t1.TankID) 
as max_expire_date 
     from Table1 as t1 
     where t1.CompanyID = '5467' 
     order by t1.CargoTankID 

有没有人知道如何得到这个linq？由于

Answer 1

tanks = db.Table1.Where(t => t.CompanyId == txtCompanyID.Text.Trim()) 
       .Join(db.Table2, t1 => t1.TankID, t2 => t2.TankID, (t1,t2) => new { Company = t1, t2.ExpireDate }) 
       .GroupBy(t => t.Company, (c,e) => new { Company = c Expiration = e.Max(x => x.ExpireDate) }) 
       .ToList(); 

最佳猜测VB

Dim tanks = db.Table1.Where(Function(t) t.CompanyId == txtCompanyID.Text.Trim()) _ 
        .Join(db.Table2, Function(t1) t1.TankID, Function(t2) t2.TankID, Function(t1,t2) New Thing With { .Company = t1, .ExpireDate = t2.ExpireDate }) _ 
        .GroupBy(Function(t) t.Company, Function(c,e) New Thing With { .Company = c, .Expiration = e.Max(Function(x) x.ExpireDate) }) _ 
        .ToList()