C# 调用基类构造函数（开发人员如何实现）

public class BaseClass {
    public int b;
    public BaseClass(int b) {
        this.b = b;
    }
}

Public Class BaseClass
	Public b As Integer
	Public Sub New(ByVal b As Integer)
		Me.b = b
	End Sub
End Class

public class DerivedClass : BaseClass {
    public DerivedClass(int b) : base(b) {
        // Additional initialization for DerivedClass
    }
}

Public Class DerivedClass
	Inherits BaseClass

	Public Sub New(ByVal b As Integer)
		MyBase.New(b)
		' Additional initialization for DerivedClass
	End Sub
End Class

public class BaseClass {
    public BaseClass() {
        // Default constructor
    }
    public BaseClass(int b) {
        this.b = b;
    }
}
public class DerivedClass : BaseClass {
    public DerivedClass() : base() {
        // Calls the parameterless constructor of the base class
    }
    public DerivedClass(int b) : base(b) {
        // Calls the base class constructor that takes an int
    }
}

Public Class BaseClass
	Public Sub New()
		' Default constructor
	End Sub
	Public Sub New(ByVal b As Integer)
		Me.b = b
	End Sub
End Class
Public Class DerivedClass
	Inherits BaseClass

	Public Sub New()
		MyBase.New()
		' Calls the parameterless constructor of the base class
	End Sub
	Public Sub New(ByVal b As Integer)
		MyBase.New(b)
		' Calls the base class constructor that takes an int
	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

using IronPdf;
// Base class for PDF generation
public class PdfGenerator
{
    protected ChromePdfRenderer Renderer;
    // Base constructor initializes the HTML to PDF renderer
    public PdfGenerator()
    {
        Renderer = new ChromePdfRenderer();
        // Additional configuration
    }
}
// Derived class uses the base class to generate a specific PDF
public class SpecificPdfGenerator : PdfGenerator
{
    public void CreateSimplePdf(string htmlContent, string filePath)
    {
        // Uses the Renderer from the base class
        var pdfDocument = Renderer.RenderHtmlAsPdf(htmlContent);
        pdfDocument.SaveAs(filePath);
    }
}
// Usage
class Program
{
    static void Main(string[] args)
    {
        License.LicenseKey = "License-Key";
        var htmlContent = "<h1>Hello, IronPDF!</h1>";
        var filePath = "example.pdf";
        var pdfCreator = new SpecificPdfGenerator();
        pdfCreator.CreateSimplePdf(htmlContent, filePath);
    }
}

Imports IronPdf
' Base class for PDF generation
Public Class PdfGenerator
	Protected Renderer As ChromePdfRenderer
	' Base constructor initializes the HTML to PDF renderer
	Public Sub New()
		Renderer = New ChromePdfRenderer()
		' Additional configuration
	End Sub
End Class
' Derived class uses the base class to generate a specific PDF
Public Class SpecificPdfGenerator
	Inherits PdfGenerator

	Public Sub CreateSimplePdf(ByVal htmlContent As String, ByVal filePath As String)
		' Uses the Renderer from the base class
		Dim pdfDocument = Renderer.RenderHtmlAsPdf(htmlContent)
		pdfDocument.SaveAs(filePath)
	End Sub
End Class
' Usage
Friend Class Program
	Shared Sub Main(ByVal args() As String)
		License.LicenseKey = "License-Key"
		Dim htmlContent = "<h1>Hello, IronPDF!</h1>"
		Dim filePath = "example.pdf"
		Dim pdfCreator = New SpecificPdfGenerator()
		pdfCreator.CreateSimplePdf(htmlContent, filePath)
	End Sub
End Class