对象集合中的唯一值

本文介绍了对象集合中的唯一值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个月份和年份的对象集合.

I have an object collection of month and year.

How can I take unique month and year of that object collection?

推荐答案

var list = (from item in collection
            select item.).Distinct();

当然，您始终可以实现比较类以传递给Distinct()方法，该方法将以更具体的形式处理比较.

Of course, you can always implement a comparare class to pass to the Distinct() method that will handle the comparison in a more specific anner.

public class MyObjectComparer : IEqualityComparer<myobject>
{
    public bool Equals(MyObject x, MyObject y)
    {
        bool equals = false;
        if (x != null && y != null)
        {
            equals = (x.Month == y.Month && x.Day == y.Day);
        }
        return equals;
    }
}

   ...
   MyObjectComparer comparer = new MyObjectComparer();
   var list = (from item in collection
               select item.).Distinct(comparer);

上面的代码在C#中，但是将其转换为VB应该没有任何问题.

The code above is in C# but you shouldn''t have any problems converting it to VB.

这篇关于对象集合中的唯一值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！