C# 面向对象（它如何为开发人员工作）

public class Car // A class declared as 'Car' defines its structure and behavior.
{
    public string Name;
    public string Color;
    public void DisplayInfo()
    {
        Console.WriteLine($"Name: {Name}, Color: {Color}");
    }
}
class Program // This is the program class, serving as the entry point of C# program
{
    static void Main(string [] args)
    {
        Car myCar = new Car();
        myCar.Name = "Toyota";
        myCar.Color = "Red";
        myCar.DisplayInfo();
    }
}

Public Class Car ' A class declared as 'Car' defines its structure and behavior.
	Public Name As String
	Public Color As String
	Public Sub DisplayInfo()
		Console.WriteLine($"Name: {Name}, Color: {Color}")
	End Sub
End Class
Friend Class Program ' This is the program class, serving as the entry point of C# program
	Shared Sub Main(ByVal args() As String)
		Dim myCar As New Car()
		myCar.Name = "Toyota"
		myCar.Color = "Red"
		myCar.DisplayInfo()
	End Sub
End Class

public class Vehicle
{
    public string LicensePlate;
    public void Honk()
    {
        Console.WriteLine("Honking");
    }
}
public class Truck : Vehicle // Truck is a child class derived from the Vehicle base class
{
    public int CargoCapacity;
}
class Program
{
    static void Main(string [] args)
    {
        Truck myTruck = new Truck();
        myTruck.LicensePlate = "ABC123";
        myTruck.CargoCapacity = 5000;
        myTruck.Honk();
    }
}

Public Class Vehicle
	Public LicensePlate As String
	Public Sub Honk()
		Console.WriteLine("Honking")
	End Sub
End Class
Public Class Truck ' Truck is a child class derived from the Vehicle base class
	Inherits Vehicle

	Public CargoCapacity As Integer
End Class
Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim myTruck As New Truck()
		myTruck.LicensePlate = "ABC123"
		myTruck.CargoCapacity = 5000
		myTruck.Honk()
	End Sub
End Class

public abstract class Shape
{
    public abstract void Draw();
}
public class Circle : Shape
{
    public override void Draw()
    {
        Console.WriteLine("Drawing a circle");
    }
}

Public MustInherit Class Shape
	Public MustOverride Sub Draw()
End Class
Public Class Circle
	Inherits Shape

	Public Overrides Sub Draw()
		Console.WriteLine("Drawing a circle")
	End Sub
End Class

public interface IDrawable
{
    void Draw();
}
public interface IColorable
{
    void Color();
}
public class CustomShape : IDrawable, IColorable // Defining a new class CustomShape that implements IDrawable and IColorable
{
    public void Draw()
    {
        Console.WriteLine("Custom shape drawn");
    }
    public void Color()
    {
        Console.WriteLine("Custom shape colored");
    }
}

Public Interface IDrawable
	Sub Draw()
End Interface
Public Interface IColorable
	Sub Color()
End Interface
Public Class CustomShape ' Defining a new class CustomShape that implements IDrawable and IColorable
	Implements IDrawable, IColorable

	Public Sub Draw() Implements IDrawable.Draw
		Console.WriteLine("Custom shape drawn")
	End Sub
	Public Sub Color() Implements IColorable.Color
		Console.WriteLine("Custom shape colored")
	End Sub
End Class

public class Person
{
    private string name; // Private variable, inaccessible outside the class
    public string Name   // Public property to access the private variable
    {
        get { return name; }
        set { name = value; }
    }
}
// Example showing a simple customer class with encapsulated data
public class Customer
{
    public string Name { get; set; }
    public string Address { get; set; } 
}

Public Class Person
'INSTANT VB NOTE: The field name was renamed since Visual Basic does not allow fields to have the same name as other class members:
	Private name_Conflict As String ' Private variable, inaccessible outside the class
	Public Property Name() As String ' Public property to access the private variable
		Get
			Return name_Conflict
		End Get
		Set(ByVal value As String)
			name_Conflict = value
		End Set
	End Property
End Class
' Example showing a simple customer class with encapsulated data
Public Class Customer
	Public Property Name() As String
	Public Property Address() As String
End Class

using System;
namespace OOPExample
{
    public class Program
    {
        static void Main(string [] args)
        {
            ElectricCar myElectricCar = new ElectricCar();
            myElectricCar.Make = "Tesla";
            myElectricCar.Model = "Model 3";
            myElectricCar.BatteryLevel = 100;
            myElectricCar.Drive();
            myElectricCar.Charge();
        }
    }
    public abstract class Vehicle
    {
        public string Make { get; set; }
        public string Model { get; set; }
        public abstract void Drive();
    }
    public class Car : Vehicle
    {
        public override void Drive()
        {
            Console.WriteLine($"The {Make} {Model} is driving.");
        }
    }
    public class ElectricCar : Car
    {
        public int BatteryLevel { get; set; }
        public void Charge()
        {
            Console.WriteLine("Charging the car.");
        }
        public override void Drive()
        {
            Console.WriteLine($"The {Make} {Model} is driving silently.");
        }
    }
}

Imports System
Namespace OOPExample
	Public Class Program
		Shared Sub Main(ByVal args() As String)
			Dim myElectricCar As New ElectricCar()
			myElectricCar.Make = "Tesla"
			myElectricCar.Model = "Model 3"
			myElectricCar.BatteryLevel = 100
			myElectricCar.Drive()
			myElectricCar.Charge()
		End Sub
	End Class
	Public MustInherit Class Vehicle
		Public Property Make() As String
		Public Property Model() As String
		Public MustOverride Sub Drive()
	End Class
	Public Class Car
		Inherits Vehicle

		Public Overrides Sub Drive()
			Console.WriteLine($"The {Make} {Model} is driving.")
		End Sub
	End Class
	Public Class ElectricCar
		Inherits Car

		Public Property BatteryLevel() As Integer
		Public Sub Charge()
			Console.WriteLine("Charging the car.")
		End Sub
		Public Overrides Sub Drive()
			Console.WriteLine($"The {Make} {Model} is driving silently.")
		End Sub
	End Class
End Namespace

using IronPdf;
public class BasicReportGenerator
{
    public virtual PdfDocument GenerateReport(string htmlContent)
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf(htmlContent);
        return pdf;
    }
}
public class CustomReportGenerator : BasicReportGenerator
{
    public override PdfDocument GenerateReport(string htmlContent)
    {
        var pdf = base.GenerateReport(htmlContent);
        AddCustomHeader(pdf, "Custom Report Header");
        return pdf;
    }
    private void AddCustomHeader(PdfDocument document, string headerContent)
    {
        // Create text header
        TextHeaderFooter textHeader = new TextHeaderFooter
        {
            CenterText = headerContent,
        };
        document.AddTextHeaders(textHeader);
    }
}
class Program
{
    static void Main(string [] args)
    {
        License.LicenseKey = "License-Key";
        // HTML content for the report
        string htmlContent = "<html><body><h1>Sample Report</h1><p>This is a sample report content.</p></body></html>";
        // Using BasicReportGenerator
        BasicReportGenerator basicReportGenerator = new BasicReportGenerator();
        var basicPdf = basicReportGenerator.GenerateReport(htmlContent);
        basicPdf.SaveAs("basic_report.pdf");
        // Using CustomReportGenerator
        CustomReportGenerator customReportGenerator = new CustomReportGenerator();
        var customPdf = customReportGenerator.GenerateReport(htmlContent);
        customPdf.SaveAs("custom_report.pdf");
        Console.WriteLine("PDF reports generated successfully.");
    }
}

Imports IronPdf
Public Class BasicReportGenerator
	Public Overridable Function GenerateReport(ByVal htmlContent As String) As PdfDocument
		Dim renderer = New ChromePdfRenderer()
		Dim pdf = renderer.RenderHtmlAsPdf(htmlContent)
		Return pdf
	End Function
End Class
Public Class CustomReportGenerator
	Inherits BasicReportGenerator

	Public Overrides Function GenerateReport(ByVal htmlContent As String) As PdfDocument
		Dim pdf = MyBase.GenerateReport(htmlContent)
		AddCustomHeader(pdf, "Custom Report Header")
		Return pdf
	End Function
	Private Sub AddCustomHeader(ByVal document As PdfDocument, ByVal headerContent As String)
		' Create text header
		Dim textHeader As New TextHeaderFooter With {.CenterText = headerContent}
		document.AddTextHeaders(textHeader)
	End Sub
End Class
Friend Class Program
	Shared Sub Main(ByVal args() As String)
		License.LicenseKey = "License-Key"
		' HTML content for the report
		Dim htmlContent As String = "<html><body><h1>Sample Report</h1><p>This is a sample report content.</p></body></html>"
		' Using BasicReportGenerator
		Dim basicReportGenerator As New BasicReportGenerator()
		Dim basicPdf = basicReportGenerator.GenerateReport(htmlContent)
		basicPdf.SaveAs("basic_report.pdf")
		' Using CustomReportGenerator
		Dim customReportGenerator As New CustomReportGenerator()
		Dim customPdf = customReportGenerator.GenerateReport(htmlContent)
		customPdf.SaveAs("custom_report.pdf")
		Console.WriteLine("PDF reports generated successfully.")
	End Sub
End Class