c#實例源代碼

1、【精品文檔】如有侵權，請聯系網站刪除，僅供學習與交流c#實例源代碼.精品文檔.【實例1-1】using System;using System.Collections.Generic;using System.Text;namespace _ class Program static void Main(string args) System.Console.WriteLine(恭喜你，學會了C#編程！); System.Console.ReadLine();【實例1-2】private void Form1_Load(object sender, EventArgs e) this.Text

2、=這是一窗口！;Label lbShow = new Label();lbShow.Location = new Point(40,50);lbShow.AutoSize = true;lbShow.Text = 恭喜你學會編程了！;this.Controls.Add(lbShow); int x, y;x = new int5 1,2,3,4,5;y = new int5;y = x;foreach (int a in y)lbShow.Text += a.ToString();this.Controls.Add(lbShow);【實例2-1】using System;using Syste

3、m.Windows.Forms;namespace TestEnum public partial class TestEnum : Form /Visual Studio .Net自動生成的構造函數，后文示例將全部省略 public TestEnum() InitializeComponent(); enum MyEnum a = 101, b, c, d = 201, e, f ; /聲明枚舉型 private void TestEnum_Load(object sender, EventArgs e) MyEnum x = MyEnum.f; /使用枚舉型 MyEnum y = (MyE

4、num)202; string result =枚舉數x的值為; result += (int)x; /將x轉換為整數 result += n枚舉數y代表枚舉元素 + y; lblShow.Text = result;【實例2-2】using System;using System.Windows.Forms;namespace TestStru public partial class TestStru : Form struct Student /聲明結構型 /聲明結構型的數據成員 public int no; public string name; public char sex; pu

5、blic int score; /聲明結構型的方法成員 public string Answer() string result=該學生的信息如下：; result += n學號： + no; /n為換行符 result += n姓名：+ name; result += n性別：+ sex; result += n成績：+ score; return result; /返回結果 private void TestEnum_Load(object sender, EventArgs e) Student s; /使用結構型 s.no = 101; = 黃海; s.sex = 男;

6、s.score = 540; lblShow.Text = s.Answer(); /顯示該生信息 lblShow.Text += nn+DateTime.Now; /顯示當前時間【實例2-3】using System;class TestConstant static void Main(string args) Console.WriteLine(0).GetType(); /有符號的32位整型常量 Console.WriteLine(0U).GetType(); /無符號的32位整型常量 Console.WriteLine(0L).GetType(); /64位的長整型常量 Consol

7、e.WriteLine(0F).GetType(); /32位的浮點型常量 Console.WriteLine(0D).GetType(); /64位的雙精度型常量 Console.WriteLine(0M).GetType(); /128位的小數型常量 Console.WriteLine(0).GetType(); /16位的字符型常量 Console.WriteLine(0).GetType(); /字符串常量 Console.WriteLine(0.0).GetType(); /64位的雙精度型常量 Console.WriteLine(true).GetType(); /布爾型常量 Co

8、nsole.WriteLine(u0041).GetType(); /16位的字符型常量Console.ReadLine();【實例2-4】using System;class TestVariable static void Main(string args) int a = 12, b = 15, c, d, e; c = a + b; d = a - b; e = a * b; Console.WriteLine(c=0td=1te=2, c, d, e);【實例2-5】using System;using System.Windows.Forms;namespace TestVaria

9、ble public partial class TestOperator : Form private void TestVariable_Load(object sender, EventArgs e) int i = 5, j = 5, p, q; p = (i+) + (i+) + (i+); q = (+j) + (+j) + (+j); string t = ; lblShow.Text = i + t + j + t + p + t + q;【實例2-6】using System;using System.Windows.Forms;namespace TestVariable

10、public partial class TestOperator : Form private void TestVariable_Load(object sender, EventArgs e) int a, b = 5; char c1 = A; a = c1; /字符型轉整型 float x = 3; x += b; /整型轉浮點型 lblShow.Text = a= + a; /整型轉為字符串 lblShow.Text += nx= + x; /浮點型轉為字符串【實例2-7】using System;using System.Windows.Forms;namespace TestV

11、ariable public partial class TestOperator : Form private void TestVariable_Load(object sender, EventArgs e) int i = 25, j = 12; bool k; string result = i!=j的值為 + (i != j); result += n i!=j & i=j的值為 + (i != j & i = j); result += n i!=j & i=j+20的值為 +(i != j & i = j + 20); result += n k = i!=j & i=j的值為

12、 + (i != j & i = j); lblShow.Text = result;【實例2-8】using System;using System.Windows.Forms;namespace TestInterface public partial class TestInterface : Form interface IStudent /聲明接口 string Answer(); class Student : IStudent /聲明類，以實現接口 public int no; public string name; public string Answer() string r

13、esult = 該學生信息如下：; result += n學號： + no; result += n姓名： + name; return result; private void btnOk_Click(object sender, EventArgs e) Student a = new Student(); /定義并初始化變量a a.no = Convert.ToInt32(txtStuID.Text); = txtName.Text; lblShow.Text = a.Answer();【實例2-9】using System;class HelloWorld public

14、string HelloCN() return 你好！我是Jackson，中國人。; public string HelloEN() return Hi! I am Jackson, a American.;class TestDelegate delegate string MyDelegate(); /聲明委托 static void Main(string args) HelloWorld hello = new HelloWorld(); /創(chuàng)建對象 MyDelegate h = new MyDelegate(hello.HelloCN); /創(chuàng)建委托對象并指向一個方法 Console

15、.WriteLine(h(); /通過委托對象調用所指向的方法 h = new MyDelegate(hello.HelloEN); Console.WriteLine(h();【實例2-10】using System;class TestArray static void Main(string args) int x,y; /聲明數組 x = new int5 1,5,3,2,4; /初始化數組 y = new int5; Array.Copy(x, y, 5); /將數組x的5個元素復制到數組y中 Console.WriteLine(成功地從數組x復制到數組y，數組y各元素值如下：);

16、for (int i = 0; i y.Length; i+) Console.Write(0t, yi); Array.Sort(x); /將數組x的元素排序 Console.WriteLine(n經過排序后，數組x各元素值如下：); for (int i = 0; i x.Length; i+) Console.Write(0t, xi);【實例2-11】using System;using System.Windows.Forms;using System.Text;namespace TestString public partial class TestString : Form p

17、rivate void TestString_Load(object sender, EventArgs e) string s; /定義字符串變量 StringBuilder sb = new StringBuilder(); /創(chuàng)建可變字符串對象 sb.Append(北運); /添加字符串 sb.Insert(1, 京奧); /插入字符串 s = sb.ToString(); /把可變字符串對象轉化為字符串 s = s.Insert(s.Length, 2008); lblShow.Text = + s + 長度為 + s.Length;【實例2-12】using System;using

18、 System.Windows.Forms;namespace TestIf public partial class TestInterface : Form private void btnOk_Click(object sender, EventArgs e) char c = Convert.ToChar(txtChar.Text); /字符串轉換為字符型 if (Char.IsLetter(c) if (Char.IsLower(c) lblShow.Text = 這是一個小寫字母。; else if (Char.IsUpper(c) lblShow.Text =這是大寫字母。; e

19、lse lblShow.Text =這是中文字符。; else lblShow.Text =這不是語言文字。;【實例2-13】using System;class TestSwitch static void Main() Console.WriteLine(服裝類別： 1=休閑裝 2=西裝 3=皮衣); Console.Write(請選擇類別： ); string s = Console.ReadLine(); int n = Convert.ToInt16(s); /把數字形式的字符串轉化為整型數 int t,cost = 0; /t用來記錄數量，cost用來記錄金額 switch (n)

20、 case 1: Console.Write(休閑裝的套數：); s = Console.ReadLine(); t = Convert.ToInt16(s); cost = t * 150; break; case 2: Console.Write(西裝的套數：); s = Console.ReadLine(); t = Convert.ToInt16(s); cost = t * 300; break; case 3: Console.Write(皮衣的件數：); s = Console.ReadLine(); t = Convert.ToInt16(s); cost = t * 600;

21、 break; default: Console.WriteLine(無效選擇，請輸入1、2或 3！); break; if (cost != 0) Console.WriteLine(應付款0元., cost); Console.WriteLine(謝謝您的惠顧！);【實例2-14】using System;using System.Windows.Forms;namespace TestWhile public partial class TestWhile : Form public TestWhile() /Visual Studio .Net自動生成的構造函數 InitializeC

22、omponent(); private void TestWhile_Load(object sender, EventArgs e) int i,sum; i=1; /循環(huán)變量賦初值 sum=0; while(i= A & c = a & c = z) n+; while (c != n); Console.WriteLine(該行中英文字母的個數為：0, n); 【實例2-16】using System;using System.Windows.Forms;namespace TestFor public partial class TestFor : Form public TestFo

23、r() InitializeComponent(); private void TestWhile_Load(object sender, EventArgs e) int i; int t; long s1, s2; s1 = t = 1; /*百萬富翁第一天給陌生人的錢為1分*/ s2 = 100000; /*陌生人第一天給百萬富翁的錢為十萬元*/ for (i = 2; i = 30; i+) t = t * 2; /*百萬富翁第i天給陌生人的錢*/ s1 = s1 + t; /*百萬富翁第i天后共給陌生人的錢*/ s2 = s2 + 100000; /*陌生人第i天后共百萬富翁的錢*/ s1 = s1 / 100; /*將百分富翁給陌生人的分幣換成元*/ MessageBox.Show(百萬富翁給陌生人+s1+元。n陌生人給百萬富翁+s2+元。 );【實例2-17】using System;class TestForeach static void Main() string names = new string5; Console.WriteLine(請輸入五個人的姓名：);