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数组是相同类型的对象的集合。数组具有相同数据类型的项的有序集合。要访问数组中的某个项,需要同时使用数组名称及该项与数组起点之间的偏移量。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。
按顺序演示了以下功能:
◆动态创建数组
◆数组快速排序
◆反转数组元素
◆动态改变数组大小
◆检索数组中元素
◆复制数组中多个元素
namespace StringDemo { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { System.Collections.ArrayList mystrlist = new System.Collections.ArrayList(); mystrlist.Add("aaaaaaaa"); mystrlist.Add("bbbbbbbb"); mystrlist.Add("cccccccc"); mystrlist.Add("dddddddd"); foreach (string str in mystrlist) { textBox1.Text += str + "\r\n"; } } private void button2_Click(object sender, EventArgs e) { String[] myArray = { "8", "one", "4", "0", "over", "the" }; foreach (string str in myArray) textBox1.Text += str + "\r\n"; textBox1.Text += "\r\n"; Array.Sort(myArray); foreach (string str in myArray) textBox1.Text += str + "\r\n"; } private void button3_Click(object sender, EventArgs e) { String[] myArray = { "8", "one", "4", "0", "over", "the" }; foreach (string str in myArray) textBox1.Text += str + "\r\n"; textBox1.Text += "\r\n"; Array.Reverse(myArray); foreach (string str in myArray) textBox1.Text += str + "\r\n"; } private void button4_Click(object sender, EventArgs e) { String[] myArray = { "one", "two", "three" }; foreach (string str in myArray) textBox1.Text += str + "\r\n"; textBox1.Text += "\r\n"; Array.Resize(ref myArray, 5); myArray[3] = "aaa"; myArray[4] = "bbb"; foreach (string str in myArray) textBox1.Text += str + "\r\n"; } private void button5_Click(object sender, EventArgs e) { string[] dinosaurs = { "Compsog0000nathus", "Amargasaurus", "Ovira0000ptor","Veloc0000iraptor", "Deinonychus","Dilop0000hosaurus","Gallimimus", "Triceratops"}; foreach (string str in dinosaurs) textBox1.Text += str + "\r\n"; textBox1.Text += "\r\n"; //要自己写一个SubStringis0000的函数,这是泛型编程 string[] subArray = Array.FindAll(dinosaurs,SubStringis0000); foreach (string str in subArray) textBox1.Text += str + "\r\n"; } private static bool SubStringis0000(string str) { if(str.Contains ("0000")) return true ; else return false ; } private void button6_Click(object sender, EventArgs e) { string[] dinosaurs = { "Compsog0000nathus", "Amargasaurus", "Ovira0000ptor","Veloc0000iraptor", "Deinonychus","Dilop0000hosaurus","Gallimimus", "Triceratops"}; foreach (string str in dinosaurs) textBox1.Text += str + "\r\n"; textBox1.Text += "\r\n"; string[] deststr = new string[2]; //Copy还有很多类型的参数,比如数组复制等。 Array.Copy(dinosaurs, 2, deststr, 0, 2); foreach (string str in deststr) textBox1.Text += str + "\r\n"; } private void button7_Click(object sender, EventArgs e) { textBox1.Text = ""; } } }
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