比较两个对象C＃的列表计数

Question

I have been sitting with a little problem that Was hoping for some help with.

I have two lists of modules that looks as follow.

What I am basically trying to achieve is track completed topics.

m1 would represent the completed set of modules with its skills and topics, and m2 would represent topics modules, skills and topics that where accessed and that are incomplete.

List <ModuleA> m1;
List <ModuleB> m2;
public class ModuleA
{
    public bool completed { get; set; }
    public string ModuleCode { get; set; }
    public List<Skill> lstKeySkills { get; set; }
}
public class ModuleB
{

    public string ModuleCode { get; set; }
    public List<Skill> lstKeySkills { get; set; }
}
public class Skill
{
    public string KeySkillName { get; set; }
    public List<Topic> LstTopics { get; set; }
}
public class Topic
{
    public string TopicName { get; set; }
}

How can I do topic count comparisons within the skills of the two modules?

I have tried something like this but it seems very messy and incorrect.

foreach (var mc in m1)
{
    foreach (var v in m2)
    {
        if (v.ModuleCode == mc.ModuleCode)
        {
            foreach (var skillsIC in v.lstKeySkills)
            {
                foreach (var skillsC in mc.lstKeySkills)
                {
                    if (skillsIC.LstTopics.Count() == skillsC.LstTopics.Count())
                    {
                        //Count is the same
                    }
                }
            }               
        }
    }
}

Answer 1

You can use join clause:

var result = from a in m1 // ModuleA iterable
             join b in m2 // ModuleB iterable
                 on new { a.ModuleCode, a.Skills.Count }
             equals new { b.ModuleCode, b.Skills.Count }
             select new { a, b };

Answer 2

This is a join, where the list counts match. Its much easier in LINQ

var result = m1.Join(m2, a => a.ModuleCode, b => b.ModuleCode, (a,b) => new { A = a, B = b})
           .Where (x => x.A.lstKeySkills.Count() == x.B.lstKeySkills.Count());

In this example, result will be an enumerable of anonymous items, which has 2 properties

• A is the ModuleA
• B is the ModuleB

A and B will always match on ModuleCode and have the same number of Skills