工厂模式C#（开发者如何使用）

public interface IVehicle
{
    void DisplayInfo();
}

Public Interface IVehicle
	Sub DisplayInfo()
End Interface

public class Car : IVehicle
{
    public void DisplayInfo()
    {
        Console.WriteLine("This is a Car.");
    }
}
public class Truck : IVehicle
{
    public void DisplayInfo()
    {
        Console.WriteLine("This is a Truck.");
    }
}

Public Class Car
	Implements IVehicle

	Public Sub DisplayInfo()
		Console.WriteLine("This is a Car.")
	End Sub
End Class
Public Class Truck
	Implements IVehicle

	Public Sub DisplayInfo()
		Console.WriteLine("This is a Truck.")
	End Sub
End Class

public abstract class VehicleFactory
{
    public abstract IVehicle CreateVehicle(string type);
}

Public MustInherit Class VehicleFactory
	Public MustOverride Function CreateVehicle(ByVal type As String) As IVehicle
End Class

public class ConcreteVehicleFactory : VehicleFactory
{
    public override IVehicle CreateVehicle(string type)
    {
        switch (type.ToLower())
        {
            case "car": return new Car();
            case "truck": return new Truck();
            default: throw new ArgumentException("Invalid vehicle type");
        }
    }
}

Public Class ConcreteVehicleFactory
	Inherits VehicleFactory

	Public Overrides Function CreateVehicle(ByVal type As String) As IVehicle
		Select Case type.ToLower()
			Case "car"
				Return New Car()
			Case "truck"
				Return New Truck()
			Case Else
				Throw New ArgumentException("Invalid vehicle type")
		End Select
	End Function
End Class

class Program
{
    static void Main(string [] args)
    {
        // create objects
        VehicleFactory factory = new ConcreteVehicleFactory();
        IVehicle car = factory.CreateVehicle("car");
        car.DisplayInfo();
        IVehicle truck = factory.CreateVehicle("truck");
        truck.DisplayInfo();
    }
}

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		' create objects
		Dim factory As VehicleFactory = New ConcreteVehicleFactory()
		Dim car As IVehicle = factory.CreateVehicle("car")
		car.DisplayInfo()
		Dim truck As IVehicle = factory.CreateVehicle("truck")
		truck.DisplayInfo()
	End Sub
End Class

using IronPdf;

class Program
{
    static void Main(string[] args)
    {
        var renderer = new ChromePdfRenderer();

        // 1. Convert HTML String to PDF
        var htmlContent = "<h1>Hello, IronPDF!</h1><p>This is a PDF from an HTML string.</p>";
        var pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent);
        pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf");

        // 2. Convert HTML File to PDF
        var htmlFilePath = "path_to_your_html_file.html"; // Specify the path to your HTML file
        var pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath);
        pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf");

        // 3. Convert URL to PDF
        var url = "http://ironpdf.com"; // Specify the URL
        var pdfFromUrl = renderer.RenderUrlAsPdf(url);
        pdfFromUrl.SaveAs("URLToPDF.pdf");
    }
}

Imports IronPdf

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim renderer = New ChromePdfRenderer()

		' 1. Convert HTML String to PDF
		Dim htmlContent = "<h1>Hello, IronPDF!</h1><p>This is a PDF from an HTML string.</p>"
		Dim pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent)
		pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf")

		' 2. Convert HTML File to PDF
		Dim htmlFilePath = "path_to_your_html_file.html" ' Specify the path to your HTML file
		Dim pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath)
		pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf")

		' 3. Convert URL to PDF
		Dim url = "http://ironpdf.com" ' Specify the URL
		Dim pdfFromUrl = renderer.RenderUrlAsPdf(url)
		pdfFromUrl.SaveAs("URLToPDF.pdf")
	End Sub
End Class

public interface IPdfCreator
{
    void CreatePdf(string source);
}

Public Interface IPdfCreator
	Sub CreatePdf(ByVal source As String)
End Interface

// public class
public class HtmlStringPdfCreator : IPdfCreator
{
    public void CreatePdf(string htmlString)
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf(htmlString);
        pdf.SaveAs("HtmlStringPdf.pdf");
    }
}
public class UrlPdfCreator : IPdfCreator
{
    public void CreatePdf(string url)
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderUrlAsPdf(url);
        pdf.SaveAs("UrlPdf.pdf");
    }
}

' public class
Public Class HtmlStringPdfCreator
	Implements IPdfCreator

	Public Sub CreatePdf(ByVal htmlString As String)
		Dim renderer = New ChromePdfRenderer()
		Dim pdf = renderer.RenderHtmlAsPdf(htmlString)
		pdf.SaveAs("HtmlStringPdf.pdf")
	End Sub
End Class
Public Class UrlPdfCreator
	Implements IPdfCreator

	Public Sub CreatePdf(ByVal url As String)
		Dim renderer = New ChromePdfRenderer()
		Dim pdf = renderer.RenderUrlAsPdf(url)
		pdf.SaveAs("UrlPdf.pdf")
	End Sub
End Class

class Program
{
    static void Main(string [] args)
    {
    License.LicenseKey = "License-Key";
        IPdfCreator htmlPdfCreator = new HtmlStringPdfCreator();
        htmlPdfCreator.CreatePdf("<h1>Hello, World!</h1>");
        IPdfCreator urlPdfCreator = new UrlPdfCreator();
        urlPdfCreator.CreatePdf("http://example.com");
    }
}

Friend Class Program
	Shared Sub Main(ByVal args() As String)
	License.LicenseKey = "License-Key"
		Dim htmlPdfCreator As IPdfCreator = New HtmlStringPdfCreator()
		htmlPdfCreator.CreatePdf("<h1>Hello, World!</h1>")
		Dim urlPdfCreator As IPdfCreator = New UrlPdfCreator()
		urlPdfCreator.CreatePdf("http://example.com")
	End Sub
End Class