如何从 C# 中的数组中获取不同的值？
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How to get distinct values from an array in C#?
提问by AK Jani
Possible Duplicate:
Remove duplicates from array
可能的重复：
从数组中删除重复项
How to get distinct values from an array in C#
如何从C#中的数组中获取不同的值
回答by Darin Dimitrov
You could use the .Distinct()extension method.
您可以使用.Distinct()扩展方法。
var collectionWithDistinctElements = oldArray.Distinct().ToArray();
回答by Samich
回答by agarcian
Use the Distinctmethod in LINQ.
使用DistinctLINQ 中的方法。
See http://msdn.microsoft.com/en-us/library/bb348436.aspx
请参阅http://msdn.microsoft.com/en-us/library/bb348436.aspx
List<int> ages = new List<int> { 21, 46, 46, 55, 17, 21, 55, 55 };
IEnumerable<int> distinctAges = ages.Distinct();
Console.WriteLine("Distinct ages:");
foreach (int age in distinctAges)
{
Console.WriteLine(age);
}
/*
This code produces the following output:
Distinct ages:
21
46
55
17
*/
回答by Amar Palsapure
Distinctshould suffice your problem, but if you are doing this on custom object you will need to implement IEquatable<T>and will need to override GetHashCode()method to make it work.
Distinct应该足以解决您的问题，但是如果您在自定义对象上执行此操作，则需要实现IEquatable<T>并且需要覆盖GetHashCode()方法以使其工作。
