C# 一个字符串是否在另外一个字符串数组里 Array.Exists 的用法 Array.IndexOf 用法

其实一行代码就可以了,不用写那么多循环,先看看老外写的代码

using System;

class Program
{
staticvoid Main()
{
string[] array = { "cat", "dot", "perls" };

// Use Array.Exists in different ways.
bool a = Array.Exists(array, element => element =="perls");
bool b = Array.Exists(array, element => element =="python");
bool c = Array.Exists(array, element => element.StartsWith("d"));
bool d = Array.Exists(array, element => element.StartsWith("x"));

// Output.
Console.WriteLine(a);
Console.WriteLine(b);
Console.WriteLine(c);
Console.WriteLine(d);
}
string[] SetSelectIds = string[] { "aa", "bb", "cc" };
string id = string "bb";
if (Array.Exists(SetSelectIds, element => element.Equals(id)))

Array.IndexOf(SetSelectIds, id) >= 0;