C#相关程序设计.docx

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1、相关程序设计、实现个Window窗体应用程序,可以实现画圆、计算、画五环与填充颜色的功能代码部分创建一个新类,名叫DrawPic.csusing System;using System.Collections.Generic;using System.Drawing;using System.Linq;using System.Text;namespace CaseOlclass DrawPic(#region 属性字段坐标值private int x;public int X(get return x;set if (value = 300)x = 150;elsex = value;)pr

2、ivate int y;public int Y(get return y;set(if (value 130)y = 100;elsey = value;)字段宽高private int p_width;public int P_widthget return p_wi出h;setif (value = 380)p_width - 200;elsep_width = value;)private int p_height;public int P_height(get return p_height;set(if (value = 160)p_height = 200;elsep_heigh

3、t = value;)/结构颜色Color c_color;const double pi = 3.14F;#endregion#region构造函数public DrawPic()()III /指定坐标和寛高/ III x 坐标值III y 坐标值III 宽度III 咼度 public DrawPic(string X,string Y,string P_width,stringP_height)(this.X = int.Parse(X);this.Y = int.Parse(Y);this.P_width = int.Parse(P_width);this.P_height = int.

4、Parse(P_height);)III Ill指定坐标和宽高构造函数重载III / x 坐标值/ y 坐标值/ 宽度III 咼度 / 颜色 public DrawPic(string X, string Y, string P_width, stringP_height, Color colors)(this.X = int.Parse(X);this.Y = int.Parse(Y);this.P_width = int.Parse(P_width);this.P_height = int.Parse(P_height);this.c_color = colors;)#endregionI

5、II III实现画圆III III 所需画圆的窗体public void DrawCircle(System.Windows.Forms.Form f)在窗体上绘制个画图图面(画布) Graphics g = f.CreateGraphics();创造个画笔指定画笔颜色及画笔宽度Pen pen = new Pen(Color.Black, 3);/指定画出的图形质量使用消除锯齿 g.SmoothingModeSystem.Drawing. Drawing2D.SmoothingMode. AntiAlias;/使用画笔画圆g.DrawEllipse(pen,newRectangle(x,y,p

6、_width,p_height);/释放画布 g.Dispose();/释放画笔 pen.Dispose();)public void FillColor(System.Windows.Forms.Form f) (Graphics g = f.CreateGraphics();Pen pen = new Pen(Color.Black, 3);g.SmoothingModeSystem.Drawing. Drawing2D.SmoothingMode. AntiAlias;g.lnterpolationMode System.Drawing. Drawing2D.lnterpolationM

7、ode. High;定义个使用颜色的填充对象Brush b = new SolidBrush(c_color);/填充一个形状在固定的坐标上g.FillEllipse(b, x + 1.5F, y + 1.5F, p_height - 3, p_wi出h - 3);g.Dispose();pen.Dispose();)public string getResult( int d)(double c = pi * d;double s = pi * (d / 2) * (d / 2);return string.Format(当前圆的周长是0:F2,面积是 1：F2!, c, s);)二、关于属

8、性的使用创建一Window窗体应用程序例子:学生年龄输入合法性的判断(成功实现)1、关于Form1.cs查看代码可得:using System;using System.Collections.Generic;using System.ComponentModel;using Sy stem. Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace Case02(public partial class Forml : Form(public Forml

9、 ()(lnitializeComponent();)private void btnMsg_Click(object sender, EventArgs e)(student myStudent = new student();myStudent.Age = int.Parse(txtAge.Text.Trim();MessageBox.Show(stri ng. Format(年龄是:0,myStudent.Age.ToString(),显示年龄，MessageBoxButtons.OK, MessageBoxIcon. Information);/myStudent.Name = zan

10、e;/string grade = myStudent.Grade;private void btnNo_Click(object sender, EventArgs e)MessageBox.Show(该用户的今年、t + txtAge.Text + T岁，显示年龄, MessageBoxButtons.OK,MessageBoxIcon. Information);)2、添加类 student.esusing System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Case0

11、2 (class studentprivate int age;public int Ageget return age;set(if (value 0 & value 110)(age = value;)elseage = 18;)private string name;III III只读/ public string Nameget return name;)private string grade;III III只写III public string Grade(set grade = value;)三、参数的值传递(使用ref与。ut进行)自定义计算税后资事例:资计税的方法为:低于等于

12、3500不计税,超出3500的部分按10%缴税查看form.cs的代码加以编写using System;using System.Collections.Generic;using System.ComponentModel;using Sy stem. Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace Case03(public partial class Forml : Form(public Forml ()(lnitializeCompon

13、ent();private void btnAccount_Click(object sender, EventArgs e) (int pay = int.Parse(txtPay.Text.Trim();double result = 0.00F;getResult(ref pay, out result);MessageBox.Show(string.Format(您的工资总额是:0n超出起征点1 :F2元n应缴纳2:F2元个人所得税 ,txtPay.Text.Trim(),pay,result),税 率 计 算,MessageBoxButtons.OK, MessageBoxIcon.

14、Information);private void getResult(ref int pay, out double result)pay -= 3500;if (pay = 1500 & pay = 4500 & pay = 9000 & pay = 35000 & pay = 55000 & pay 80000)(result = pay * 0.35F;)else(result = pay * 0.45F;)四、构造函数的使用应先添加Window窗体,代码如下:using System;using System.Collections.Generic;using System.Comp

15、onentModel;using Sy stem. Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace Case04public partial class MainForm : Form(public MainForm()lnitializeComponent();)private void btnExit_Click(object sender, EventArgs e)(this.Close();)private void btnTestStudentClass_Click(ob

16、ject sender, EventArgs e)(/Student zhang = new Student();/zhang.Name =张靓靓；/zhang. Age = 20;/zhang. Hobby =唱歌歌；Student scofield = new Student(Scofield, 28,越狱狱）Student zhang = new Student(张靓靓、 20,唱歌歌);Student jay = new Student(周杰杰，21,耍双节棍棍 )；/Student scofield = new Student(Scofield);scofield.SayHi();z

17、hang.SayHi();jay.SayHi();)事例:学生的自我介绍,代码如下:Student.cs 代码using System;using System.Collections.Generic;using System.Text;using System.Windows.Forms;namespace Case04class Studentpublic Student() public Student(string name)(this.Name = name;)public Student(string name, int age, string hobby)(this.Name =

18、 name;this.Age = age;this.Hobby = hobby;)/ III姓名III private string name;public string Nameget return name;set name = value;Ill /年龄/ private int age;public int Ageget return age;set(属性是聪明的字段if (value 0 & value 100)(age = value;)else(age = 18;)/ /Z爱好Ill private string hobby;public string Hobby(get ret

19、urn hobby;set hobby = value;)public void SayHi()(string message;message = string.Format(大家好,我是0同学,今年1岁了,我喜欢2 ,name, this.age, this.hobby)；MessageBox.Show(message);)五、应先添加Windows图体(MainForm.es査看代码并进行编辑)使用构造函数实例化1、StriictStudent.cs 的代码如下using System;using System.Collections.Generic;using System.Text;u

20、sing System.Windows.Forms;namespace CaseStructpublic enum Genders(Male, Female)结构版Studentstruct StructStudent(public string Name;public Genders Gender;public int Age;public string Hobby;public int Popularity;public StructStudent(string name, Genders gender, int age, string hobby): this(name, gender,

21、 age, hobby, 100) public StructStudent(string name, Genders gender, int age, string hobby, int popularity)(this.Name = name;this.Gender = gender;this.Age = age;this.Hobby = hobby;this.Popularity = popularity;)public void SayHi()(string message;message = string.Format(大家好,我是0同学,今 年1岁了,我喜欢2。我的人气值高达3 !

22、,this.Name, this.Age, this.Hobby, this.Popularity);MessageBox.Show(message);)2、MainForm.es 代码如下:using System;using System.Collections.Generic;using System.ComponentModel;using Sy stem. Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace CaseStruct(public partial class Ma

23、inForm : Formpublic MainForm()(lnitializeComponent();)private void btnExit_Click(object sender, EventArgs e)(this.Close();) private void btnTest_Click(object sender, EventArgs e)不使用new/TestStruct();/使用newTestStructNew();)private void TestStruct()(StructStudent myStu;my Stu. Age = 20;myStu.Gender = G

24、enders.Female;myStu.Hobby =唱歌歌；myStu.Name =张靓靓；myStu.Popularity = 100;myStu.SayHi();)private void TestStructNew()(StructStudent myStu = new StructStudent(张靓靓, Genders.Female, 20,唱歌歌，100);myStu.SayHi();)六、mySchoo! 类使用索引器知识点1、MainForm.cs的代码入下:using System;using System.Collections.Generic;using System.

25、ComponentModel;using Sy stem. Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace MySchoolpublic partial class MainForm : Form(public MainForm()(lnitializeComponent();)private void btnExit_Click(object sender, EventArgs e)this.Close();)/测试入口private void btnTestStudentCla

26、ss_Click(object sender,Eve nt Args e)(/TestValueReference();TestArrayParameter();/Testi ndexer();)/值类型和引用类型参数演示private void TestValueReference()(传递引用类型参数Student scofield = new StudentfScofield, Genders.Male, 28,”越狱狱;scofield.SayHi();Vote(ref scofield);scofield.SayHi();/传递值类型参数/StructStudentscofieldn

27、ewStructStudentfScofield, Genders.Male, 28,”越狱狱/scofield.SayHi();/Vote (ref scofield);/scofield.SayHi();)/数组参数演示private void TestArrayParameter()(int odd = 1,3, 5;PrintArray(odd);ChangeToEven(odd);PrintArray(odd);)索引器演示private static void Testindexer()(/采用数组属性的方式/MyClassl myClassl = new MyClass1(T01

28、);/myClassl .Students2.SayHi();myClass1.Students”周杰杰.SayHi(); 编译出采用索引器的方式MyClass myClass = new MyClass(T01);myClass.Students2.SayHi();myClass.Students周杰杰”.SayHi();)/投票每次投票增加人气值1private void Vote(ref Student stu)(stu.Popularity+;)/投票每次投票增加人气值1private void Vote(ref StructStudent stu)(stu.Popularity+;)

29、private void ChangeToEven(int arr)(for (int i = 0; i arr.Length; i+)(arri = i * 2;)private void PrintArray(int arr)for (int i = 0; i arr.Length; i+)Console.WriteLine(arr0=1i, arri);)2、MyClass.esusing System;using System.Collections.Generic;using System.Text;namespace MySchool(III III班级类/ class MyCla

30、sspublic MyClass(string name)this.name = name;this.students = new Students();)班级名称private string name;public string Name(get return name;set name = value;学员集合private Students students;internal Students Studentsget return students;set students = value;3、MyClassl .csusing System;using System.Collectio

31、ns.Generic;using System.Text;namespace MySchool(class MyClassl(public MyClassl (string name)(this.name = name;this.students = new Student3;studentsO = new Student(Scofield, Genders.Male, 28,越狱狱;students1 = new Student(张靓靓，Genders.Female, 20,唱歌歌”);students2 = new Student(周杰杰，Genders.Male, 21,耍双节棍棍)；

32、)班级名称private string name;public string Nameget return name;set name = value;)/学员集合private StudentQ students;public Student Students(get return students;set students = value;)4、StructStudent.esusing System;using System.Collections.Generic;using System.Text;using System.Windows.Forms;namespace MySchoo

33、l结构版Studentstruct StructStudent public string Name;public Genders Gender;public int Age;public string Hobby;public int Popularity;public StructStudent(string name, Genders gender, int age, string hobby): this(name, gender, age, hobby, 100) public StructStudent(string name, Genders gender, int age, s

34、tring hobby, int popularity)(this.Name = name;this.Gender = gender;this.Age = age;this.Hobby = hobby;this.Popularity = popularity;)public void SayHi()string message;message = string.FormatC,大家好,我是0同学,今 年1岁了,我喜欢2。我的人气值高达3 this.Name, this.Age, this.Hobby, this.Popularity );MessageBox.Show(message);)5、

35、Student.esusing System;using System.Collections.Generic;using System.Text;using System.Windows.Forms;namespace MySchool public enum Genders(Male, Female 类版 Studentclass Studentpublic Student。: this(张靓靓，Genders.Female, 20,“唱歌歌，100) public Student(string name) : this(name, Genders.Male,20,打篮球，10） publ

36、ic Student(string name, Genders gender, int age,string hobby): this(name, gender, age, hobby, 100) public Student(string name, Genders gender, int age,string hobby, int popularity)this.Name = name;this.Gender = gender;this.Age = age;this.Hobby = hobby;this.Popularity = popularity;III III姓名III privat

37、e string name;public string Nameget return name;set name = value;)III /性别/ private Genders gender; public Genders Gender (get return gender; set gender = value;)/ III年龄/ private int age; public int Age (get return age; set(属性是聪明的字段if (value 0 & value 100)age = value;)elseage = 18;)人气指数private int po

38、pularity;public int Popularity(get return popularity;set popularity = value;)III /Z爱好/ private string hobby;get return hobby;set hobby = value;)public void SayHi()(string message;message = string. Format(大家好,我是0同学,今 年1岁了,我喜欢2。我的人气值高达3 !*, this.name, this.age, this.hobby,this.popularity );MessageBox.

39、Show(message);)6、Students.esusing System;using System.Collections.Generic;using System.Text;namespace MySchoolclass Students private StudentQ students = new Student3;public Students()(studentsO = new Student(Scofield, Genders.Male, 28,越狱狱students1 = new Student(张靓靓，Genders.Female, 20,唱歌歌);students2

40、= new Student(周杰杰，Genders.Male, 21,耍双节棍棍)；)/基本索引器根据数组下标查找学员public Student thisint index(get return studentsindex;)与Java中的getter方法类比 证明方法可以返回一个 类型/public Student GetStudent(int index)/ return studentsindex;/)重载的索引器 根据姓名查找学员public Student thisstring name(get(int i;bool found = false;for (i = 0; i students.Length; i+)(if (studentsi.Name = name) (found = true;break;)if (found)(return studentsi; elsereturn null;)七、string的相关应用事例:stringMethod发送电子邮件的相关代码1、CheckMail.csusing System;using System.Collections.Generic;u