Lambda轉換爲LINQ

Question

我對lambda沒有任何瞭解，我甚至無法讀取複雜的lambda expression。我有這個lambda代碼下面，我想轉換成LINQ，但我不知道如何。

var train = db.sample1 
      .Join(db.sample2, a => a.CertificateId, b => b.CertificateId, (a, b) => new { a, b }) 
      .Where(x => x.a.Year.Value.Year == year && x.a.TrainingTypeId.Value == trainingTypeId && x.a.IsApproved.Value && x.b.EndDate >= DateTime.Now) 
      .Select(z => z.a).Distinct(); 

我迄今試圖和被困於：

var train = (from c in db.sample1 
    join in ts sample2 where a.CertificateId equals b.CertificateId 
    ...... 

Answer 1

LAMBDA LINQ仍然是一個鏈接的表達。然而，該聲明應該是這個樣子：

var train2 = (from c in db.sample1 
    join t in db.sample2 
     on c.CertificateId equals t.CertificateId 
     where c.Year.Value.Year == year && c.TrainingTypeId.Value == trainingTypeId 
     && c.IsApproved.Value && t.EndDate >= DateTime.Now 
     select c).Distinct();