检查某些列表值是否属于另一个列表

本文关键字：列表 属于 另一个 是否 检查 | 更新日期: 2023-09-27 18:01:29

我有两个单词列表

  List<string> mainList = new List<string> {"blue", "green", "mother", "black", "gray"};
  List<string> checkList = new List<string> {"mother", "green", "father", "black", "gray"};

然后我想从第一个列表中取一个随机元素…

  Random rand = new Random();
  string iGenerated = mainList[rand.Next(mainList.Count)];

和检查这个字符串是否也属于第二个列表。我不确定我到底该怎么做。我认为史密斯是这样的……这是正确的方式吗?

 if checkList.Contains(iGenerated) bool strInArray = true;
 else bool strInArray = false;

检查某些列表值是否属于另一个列表

您尝试做的事情可以使用List的Contains() 

using System;
using System.Collections.Generic;
public class Program
{
    public static void Main()
    {
        List<string> mainList = new List<string> { "blue", "green", "mother", "black", "gray" };
        List<string> checkList = new List<string> { "mother", "green", "father", "black", "gray" };
        Random r = new Random();
        // Run five random tests
        for (int i = 0; i < 5; i++)
        {
            string mainListItem = mainList[r.Next(0, mainList.Count)];
            Console.WriteLine(checkList.Contains(mainListItem)
                              ? "{0} found in checkList"
                              : "{0} not found in checkList", mainListItem);
        }
    }
}

结果:

green found in checkList
mother found in checkList
gray found in checkList
blue not found in checkList
mother found in checkList
演示

这是我在控制台应用程序中的程序:

static void Main(string[] args)
        {
            List<string> color1 = new List<string> { "blue", "green", "mother", "black", "gray" };
            List<string> color2 = new List<string> { "mother", "green", "father", "black", "gray" };
            string rd = GetRandom(color1);
            if (color2.Contains(rd))
            {
                // do something
                Console.WriteLine(rd);
            }
            else
            {
                // do another work
            }           
            Console.Read();
        }
        static string GetRandom(List<string> color)
        {
            var arr = color.ToArray();
            Random rd=new Random();
            int n = rd.Next(arr.Length);
            return arr[n];
        }

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