C# 基于方法将sql查询转换为linq to entities

我在sql server中得到了这个查询，可以满足我的需要。。 如何将其转换为linq

select  t1.IDHardware,h.DescricaoHardware
from dbo.ProcessoHardware t1
INNER JOIN
(select t2.IDHardware, max(t2.IDProcessoHardware) as maxVisit
from dbo.ProcessoHardware t2
group by t2.IDHardware,t2.IDProcesso) v ON
v.maxVisit = t1.IDProcessoHardware JOIN dbo.Hardware h ON t1.IDHardware=h.IDHardware
where t1.Estado=1 AND IDProcesso=1

这就是我现在所处的位置…但我无法理解这一点

var ProcHardware = (from procHardware in db.ProcessoHardwares
                            where procHardware.IDProcesso == IDProcesso
                            select new { procHardware.IDHardware, procHardware.IDProcessoHardware, procHardware.IDProcesso, procHardware.Estado } into x
                            group x by new { x.IDHardware, x.IDProcesso, x.IDProcessoHardware, x.Estado } into t
                            let Max = t.Max(g => g.IDProcessoHardware)
                            select new { IDHardware = t.Key.IDHardware, Estado = t.Key.Estado, t.Key.IDProcesso,IDProcessoHardware=t.Key.IDProcessoHardware,cMax=Max }).ToList().Where(t => t.Estado == 1 && t.IDProcesso == IDProcesso && t.IDProcessoHardware==Max).Select(c => new VMProcessoChooseHardware
                       {
                           IDHardware = c.IDHardware
                       });

我得到了这个表，它将表硬件与表进程联系起来。。此表称为processHardware。此表由以下内容描述：IDProcessHardware IdProcessIdHardware State

字段状态可以有3种状态（1-插入、2-移除、3-替换）。。所以我可以要这个：

IDProcessHardware  IDProcess  IDHardware State

  1                  10          1        1

  2                  10          2        1

  3                  10          1        2

  4                  10          1        1

  5                  20          1        1

我想得到的是已插入但未从进程中删除的IDHardware。 因此，通过给定IDProcess=10，我想得到硬件ID为1和2的硬件

IDProcessHardware  IDProcess  IDHardware State

  1                  10          1        1

  2                  10          2        1

  3                  10          1        2

  4                  20          1        1

在上表中，通过给IDProcess 10，它应该给我硬件ID 2

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提前感谢…

经过大量的尝试和错误，以及大量的搜索，我找到了这个链接

那家伙在尝试类似我想要的东西。。 因此，我选择linq查询并对其进行转换

这就是我现在拥有的

var ProcHardware = (from a in db.ProcessoHardwares
                                group a by new { a.IDHardware, a.IDProcesso } into latest
                                join b in db.ProcessoHardwares on new { dt = latest.Max(itm => itm.IDProcessoHardware) } equals new {  dt = b.IDProcessoHardware }
                                select new { ID = b.IDHardware, Estado=b.Estado,IDProcesso=b.IDProcesso }).ToList().Where(t => t.Estado == 1 && t.IDProcesso == IDProcesso ).Select(c => new VMProcessoChooseHardware
                           {
                               IDHardware = c.ID
                           });

它还需要其他描述硬件的信息，如序列号或描述。 我将在这里发布完整的查询