C#中ArrayList类的使用方法

ArrayList元素的添加

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;//在C#中使用ArrayList必须引用Collections类

namespace arrayD
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr = new int[] { 1,2,3,4,5};
            ArrayList list = new ArrayList(arr);
            Console.WriteLine("原始ArrayList类中的数据");
            foreach (int i in list)
            {
                Console.Write(i+" ");
            }
            Console.WriteLine();
            Console.WriteLine("使用add方法添加");
            for (int i = 1; i < 5; i++)
            {
                list.Add(i+arr.Length);
            }
            foreach (int i in list)
            {
                Console.Write(i + " ");
            }
            Console.WriteLine();
            Console.WriteLine("使用Insert方法添加");
            list.Insert(5,6);
            foreach (int i in list)
            {
                Console.Write(i + " ");
            }
            Console.WriteLine();
            Console.ReadLine();

}
}
}

ArrayList元素的删除

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace arrayDel
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr = new int[] { 1, 2, 3, 4, 5, 6 };
            ArrayList list = new ArrayList(arr);
            Console.WriteLine("删除前ArrayList元素");
            foreach (int i in list)
            {
                Console.Write(i+" ");
            }
            Console.WriteLine();
            list.RemoveRange(0, 3);//使用RemoveRange方法删除指定的元素
            Console.WriteLine("删除后ArrayList元素");
            foreach (int i in list)
            {
                Console.Write(i + " ");
            }
            Console.ReadLine();
        }
    }
}

ArrayList元素的遍历

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace arrayBl
{
    class Program
    {
        static void Main(string[] args)
        {
            ArrayList arr = new ArrayList();
            arr.Add("C#学习");
            arr.Add("努力学习C#");
            foreach (string i in arr)
            {
                Console.WriteLine(i);
            }
            Console.ReadLine();
        }
    }
}

ArrayList元素的查找

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace arrayCz
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] arr = new int[] { 1,2,3,4,5,6};
            ArrayList list = new ArrayList(arr);
            Console.WriteLine(list.IndexOf(3));//使用IndexOf方法查找，返回值为坐标
            Console.WriteLine(list.Contains(8));//使用Contains方法查找，返回值为True/False
            Console.ReadLine();
        }
    }
}