1.添加一个扩展方法
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public static class DistinctByClass
{
public static IEnumerable<TSource> DistinctBy<TSource, TKey>( this IEnumerable<TSource> source, Func<TSource, TKey> keySelector)
{
HashSet<TKey> seenKeys = new HashSet<TKey>();
foreach (TSource element in source)
{
if (seenKeys.Add(keySelector(element)))
{
yield return element;
}
}
}
}
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2.使用方法如下(针对ID,和Name进行Distinct)
var query = people.DistinctBy(p => new { p.Id, p.Name });
3.若仅仅针对ID进行distinct:
var query = people.DistinctBy(p => p.Id);转 https://www.cnblogs.com/hsjloveit/p/12509818.html