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C#数组操作方法

原文:http://it.100xuexi.com/view/otdetail/20130114/1fa06deb-23e8-4732-bb3c-5a066ea14bb2.html

本文向大家介绍C#数组操作,可能好多人还不了解C#数组操作,没有关系,看完本文你肯定有不少收获,希望本文能教会你更多东西。

  数组是相同类型的对象的集合。由于数组几乎可以为任意长度,因此可以使用数组存储数千乃至数百万个对象,但必须在创建数组时就确定其大小。数组中的每项都按索引进行访问,索引是一个数字,指示对象在数组中的存储位置或槽。数组既可用于存储引用类型,也可用于存储值类型。
  C#数组操作程序:
1.            using System;  2.            using System.Collections.Generic;  3.            using System.Text;  4.             5.            namespace ClassAboutArray  6.            {  7.            public class CreateArray  8.            {  9.            /// <summary> 10.        /// 一维数组的定义 11.        /// </summary> 12.        public void testArr1()  13.        {  14.        int[] myIntArr = new int[100];  15.        //定义一个长度为100的int数组 16.        string[] mystringArr = new string[100];  17.        //定义一个长度为100的string数组 18.        object[] myObjectArr = new object[100];  19.        //定义一个长度为100的int数组 20.         21.        int[] myIntArr2 = new int[] { 1, 2, 3 };   22.        //定义一个int数组,长度为3  23.        string[] mystringArr2 = new string[] { "", "" };  24.        //定义一个string数组,长度为2  25.        }  26.         27.        /// <summary> 28.        /// 多维数组的定义 29.        /// </summary> 30.        public void testArr2()  31.        {  32.        int[,] myIntArr = new int[10, 100];   33.        //定义一个10*100的二维int数组 34.        string[, ,] mystringArr = new string[2, 2, 3];   35.        //定义一个2*2*3的三维string数组   36.         37.        int[,] myIntArr2 = new int[,] { { 1, 2, 3 }, { -1, -2, -3 } };  38.        //定义一个2*3的二维int数组,并初始化 39.        string[,] mystringArr2 = new string[,] { { "", "" }, { "《围城》", "《晨露》" } };  40.        //定义一个2*2的二维string数组,并初始化 41.        }  42.         43.        /// <summary> 44.        /// 交错数组的定义 45.        /// </summary> 46.        public void testArr3()  47.        {  48.        int[][] myJaggedArray = new int[3][];  49.        myJaggedArray[0] = new int[5];  50.        myJaggedArray[1] = new int[4];  51.        myJaggedArray[2] = new int[2];  52.         53.        int[][] myJaggedArray2 = new int[][]  54.         {  55.        new int[] {1,3,5,7,9},  56.        new int[] {0,2,4,6},  57.        new int[] {11,22}  58.         };  59.        }  60.        }  61.         62.        public class TraverseArray  63.        {  64.        /// <summary> 65.        /// 使用GetLowerBound|GetUpperBound遍历数组 66.        /// </summary> 67.        public void test1()  68.        {  69.        //定义二维数组 70.        string[,] myStrArr2 = new string[,] { { "", "" }, { "《围城》", "《晨露》" }, { "毛毛熊", "Snoopy" } };  71.        //循环输出 72.        for (int i = myStrArr2.GetLowerBound(0); i <= myStrArr2.GetUpperBound(0); i++)  73.        {  74.        Console.WriteLine("item{0}", i);  75.        for (int j = myStrArr2.GetLowerBound(1); j <= myStrArr2.GetUpperBound(1); j++)  76.        {  77.        Console.WriteLine(" item{0}{1}:{2}", i, j, myStrArr2.GetValue(i, j));  78.        }  79.        }  80.        }  81.         82.        /// <summary> 83.        /// 使用foreach遍历数组 84.        /// </summary> 85.        public void test2()  86.        {  87.        //定义二维数组 88.        string[,] myStrArr2 = new string[,] { { "", "" }, { "《围城》", "《晨露》" }, { "毛毛熊", "Snoopy" } };  89.        //循环输出 90.        foreach (string item in myStrArr2)  91.        {  92.        {  93.        Console.WriteLine("{0}", item);  94.        }  95.        }  96.        }  97.        }  98.         99.        public class SortArray  100.     {  101.     /// <summary> 102.     /// 利用Sort方法进行数组排序 103.     /// </summary> 104.     public void test1()  105.     {  106.     //定义数组 107.     int[] myArr = { 5, 4, 3, 2, 1 };  108.      109.     //输出原始数组:原始数组:5->4->3->2->1-> 110.     Console.WriteLine("原始数组:");  111.     for (int i = 0; i < myArr.Length; i++)  112.     Console.Write("{0}->", myArr[i]);  113.     Console.WriteLine();  114.      115.     //对数组排序 116.     Array.Sort(myArr);  117.      118.     //并输出排序后的数组:1->2->3->4->5-> 119.     Console.WriteLine("排序以后数组:");  120.     for (int i = 0; i < myArr.Length; i++)  121.     Console.Write("{0}->", myArr[i]);  122.     }  123.      124.     /// <summary> 125.     /// 多个数组的关键字排序 126.     /// </summary> 127.     public void test2()  128.     {  129.     //定义数组 130.     int[] arrSid = { 5, 4, 3, 2, 1 };  131.     string[] arrSname = { "张三", "李四", "王五", "麻子", "淘气" };  132.      133.     //输出原始数组:原始数组:张三(5)->李四(4)->王五(3)->麻子(2)->淘气(1)-> 134.     Console.WriteLine("原始数组:");  135.     for (int i = 0; i < arrSid.Length; i++)  136.     Console.Write("{0}({1})->", arrSname[i], arrSid[i]);  137.     Console.WriteLine();  138.      139.     //根据学号关键字排序 140.     Array.Sort(arrSid, arrSname);  141.      142.     //并输出排序后的数组:淘气(1)->麻子(2)->王五(3)->李四(4)->张三(5)  143.     Console.WriteLine("排序以后数组:");  144.     for (int i = 0; i < arrSid.Length; i++)  145.     Console.Write("{0}({1})->", arrSname[i], arrSid[i]);  146.     }  147.     }  148.      149.     public class SearchArray  150.     {  151.     /// <summary> 152.     /// 利用BinarySearch方法搜索元素 153.     /// </summary> 154.     public void test1()  155.     {  156.     //定义数组 157.     int[] myArr = { 5, 4, 3, 2, 1 };  158.      159.     //对数组排序 160.     Array.Sort(myArr);  161.      162.     //搜索 163.     int target = 3;  164.     int result = Array.BinarySearch(myArr, target); //2  165.     Console.WriteLine("{0}的下标为{1}", target, result); //2  166.     }  167.      168.     /// <summary> 169.     /// 判断是否包含某个值 170.     /// </summary> 171.     public void test2()  172.     {  173.     //定义数组 174.     string[] arrSname = { "张三", "李四", "王五", "麻子", "淘气" };  175.      176.     //判断是否含有某值 177.     string target = "王五";  178.     bool result = ((System.Collections.IList)arrSname).Contains(target);  179.     Console.WriteLine("包含{0}?{1}", target, result); //true  180.     }  181.     }  182.      183.     public class ReverseArray  184.     {  185.     /// <summary> 186.     /// 利用Reverse方法反转数组 187.     /// </summary> 188.     public void test1()  189.     {  190.     //定义数组 191.     int[] myArr = { 5, 4, 3, 2, 1 };  192.      193.     //输出原始数组:原始数组:5->4->3->2->1-> 194.     Console.WriteLine("原始数组:");  195.     for (int i = 0; i < myArr.Length; i++)  196.     Console.Write("{0}->", myArr[i]);  197.     Console.WriteLine();  198.      199.     //对数组反转 200.     Array.Reverse(myArr);  201.      202.     //并输出反转后的数组:1->2->3->4->5-> 203.     Console.WriteLine("反转以后数组:");  204.     for (int i = 0; i < myArr.Length; i++)  205.     Console.Write("{0}->", myArr[i]);  206.     }  207.     }  208.      209.     public class CopyArray  210.     {  211.     /// <summary> 212.     /// 利用Copy静态方法复制数组 213.     /// </summary> 214.     public void test1()  215.     {  216.     //定义数组 217.     int[] myArr = { 5, 4, 3, 2, 1 };  218.      219.     //输出原始数组:原始数组:5->4->3->2->1-> 220.     Console.WriteLine("原始数组:");  221.     for (int i = 0; i < myArr.Length; i++)  222.     Console.Write("{0}->", myArr[i]);  223.     Console.WriteLine();  224.      225.     //复制数组 226.     int[] newnewArr = new int[3];  227.     Array.Copy(myArr, newArr, 3);  228.      229.     //并输出反复制的数组:5->4->3-> 230.     Console.WriteLine("复制数组:");  231.     for (int i = 0; i < newArr.Length; i++)  232.     Console.Write("{0}->", newArr[i]);  233.     }  234.      235.     /// <summary> 236.     /// 利用CopyTo实例方法复制数组 237.     /// </summary> 238.     public void test2()  239.     {  240.     //定义数组 241.     int[] myArr = { 5, 4, 3, 2, 1 };  242.      243.     //输出原始数组:原始数组:5->4->3->2->1-> 244.     Console.WriteLine("原始数组:");  245.     for (int i = 0; i < myArr.Length; i++)  246.     Console.Write("{0}->", myArr[i]);  247.     Console.WriteLine();  248.      249.     //复制数组 250.     int[] newnewArr = new int[7];  251.     myArr.CopyTo(newArr, 2);  252.      253.     //并输出反复制的数组:0->0->5->4->3->2->1-> 254.     Console.WriteLine("复制数组:");  255.     for (int i = 0; i < newArr.Length; i++)  256.     Console.Write("{0}->", newArr[i]);  257.     }  258.     }  259.      260.     public class DynamicCreateArray  261.     {  262.     /// <summary> 263.     /// 利用CreateInstance动态创建数组 264.     /// </summary> 265.     public void test1()  266.     {  267.     //定义长度数组 268.     int[] lengthsArr = new int[] { 3, 4 };  269.     int[] lowerBoundsArr = { 1, 11 };  270.      271.     Array arr = Array.CreateInstance(Type.GetType("System.Int32"), lengthsArr, lowerBoundsArr);  272.      273.     Random r = new Random(); //声明一个随机数对象 274.     //循环赋值、输出 275.     for (int i = arr.GetLowerBound(0) - 1; i < arr.GetUpperBound(0) - 1; i++)  276.     {  277.     for (int j = arr.GetLowerBound(1) - 1; j < arr.GetUpperBound(1) - 1; j++)  278.     {  279.     arr.SetValue((int)r.Next() % 100, i, j);//用1~100的随即数赋值 280.     Console.WriteLine("arr[{0},{1}]={3}", i, j, arr.GetValue(i, j));  281.     }  282.     }  283.     }  284.     }  285.     } 

 

C#数组操作方法