如何比较列表中的ID< list< int>>在LINQ

问题描述：

大家好，

我有一个清单，其中还有一个清单。

赞：在候选人中，我有证书列表，在证书中，我有模块列表。

我想比较Candidate.Certificate.Moduels.ID with Given.ModuleID。

我尝试过：

Hi guys,

I have a list and in that, i have one more list.

Like: In Candidate, I have list of Certificates and in Certificate, I have list of Modules.

I want to compare Candidate.Certificate.Moduels.ID with Given.ModuleID.

What I have tried:

List<CandidateCertificateInfo> candidateCertificates = CandidateCertificateController.GetAllCandidateCertificateByCandidateID(candidateSession.CandidateCertificate.CandidateID).Where(item => item.Certification.ProgramID == candidateSession.Module.ProgramID).ToList();

foreach (var candidateCertificate in candidateCertificates)
{
    List<int> candidateCertificateModuleID = candidateCertificate.CandidateCertificateModuleDetails.Select(item => item.ModuleID).ToList();
    foreach (int ccmid in candidateCertificateModuleID)
    {
        if (ccmid == candidateSession.ModuleID)
        {
            //CODE HERE...
        }
    }
}

i想要制作此代码尽可能小。或者是，好吧我写的。

请告诉我。

谢谢

i want to make this code as small as possible. Or is it, ok what i wrote.

Please let me know.

thanks

答

嗯......将Linq返回值合并到List只是为了将它用作 foreach ...你做了两次。

并且总是有List< T> .ForEach方法，可以完全取代内循环。

Well...it's a bit pointless coalescing the Linq return value to a List just to use it as the target of a foreach ... which you do twice.
And there is always the List<T>.ForEach method, which could replace the inner loop completely.

如果您想使用Linq实现这一点，最合适的方法是 Enumerable.Any [ ^ ]

If you would like to achieve that using Linq, the most appropriate method is Enumerable.Any[^]

var result = candidateCertificates.CandidateCertificateModuleDetails.Any(x=>x.ModuleID == Given.ModuleID);

返回 true 如果找到模块或 false 在其他情况下。

Returns true if module has been found or false in other case.

如何比较列表中的ID< list< int>>在LINQ

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