对象字段包含arrayElements

本文关键字：arrayElements 包含 字段 对象 | 更新日期: 2023-09-27 18:29:55

我有一个数组：

string myArray={"15","56","17-75","78","100-150","130"}

我想通过arrayElements筛选myList。

我想要与以下代码等效的代码，但以编程方式：

mylist.Where(i=>i.val==15 || i.val==56 || (i.val >= 17 && i.val<75) ||i.val==78 || (i.val >= 100 && i.val<150)|| i.val==130)

对象字段包含arrayElements

首先将字符串转换为更有效的东西来比较：

int[][] spans =
  myArray.Select(
    s => s.Split('-').Select(v => Int32.Parse(v)).ToArray()
  ).ToArray();

然后，您可以将列表中的项目与值进行比较：

list.Where(i => spans.Any(s => {
  if (s.Length == 1) {
    return i == s[0];
  } else {
    return i >= s[0] && i <= s[1];
  }
}));

我已经为您准备了一个控制台应用程序。请浏览：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
    class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
    }
class Program
{
    static void Main(string[] args)
    {
        IEnumerable<Person> myQuery = null;
        List<Person> peopleList = new List<Person>();
        Person p1 = new Person();
        p1.Name = "x"; p1.Age = 15;
        peopleList.Add(p1);
        Person p2 = new Person();
        p2.Name = "y"; p2.Age = 50;
        peopleList.Add(p2);
        string[] myArray = { "15", "56", "17-75", "78", "100-150", "130" };
        foreach (string strAge in myArray)
        {
            string strLocalAge = strAge;
            if (!strLocalAge.Contains("-"))
            {
                if (myQuery == null)
                {
                    myQuery = peopleList.Where(p => p.Age == Convert.ToInt32(strLocalAge));
                }
                else
                {
                    myQuery = myQuery.Union(peopleList.Where(p => p.Age == Convert.ToInt32(strLocalAge)));
                }
            }
            else
            {
                string[] agePart = strLocalAge.Split(new char[] { '-' });
                if (agePart.Length == 2)
                {
                    if (myQuery == null)
                    {
                        myQuery = peopleList.Where(p => p.Age >= Convert.ToInt32(agePart[0]) && p.Age <= Convert.ToInt32(agePart[1]));
                    }
                    else
                    {
                        myQuery = myQuery.Union(peopleList.Where(p => p.Age >= Convert.ToInt32(agePart[0]) && p.Age <= Convert.ToInt32(agePart[1])));
                    }
                }
            }
        }
        var myresult = myQuery.ToList();
        foreach (Person p in myresult)
        {
            Console.WriteLine("Name: " + p.Name + " Age: " + p.Age.ToString());
        }
        Console.ReadLine();
    }
}

}

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