PostSharp C# (如何為開發人員運作)

using PostSharp.Aspects;
using System;

// Define a logging aspect using OnMethodBoundaryAspect
[Serializable]
public class LoggingAspect : OnMethodBoundaryAspect
{
    // Executed before the method is invoked
    public override void OnEntry(MethodExecutionArgs args)
    {
        Console.WriteLine($"Entering method {args.Method.Name}.");
    }

    // Executed after the method has completed execution, both on success and failure
    public override void OnExit(MethodExecutionArgs args)
    {
        Console.WriteLine($"Exiting method {args.Method.Name}.");
    }

    // Executed when the method throws an exception
    public override void OnException(MethodExecutionArgs args)
    {
        Console.WriteLine($"Exception in method {args.Method.Name}: {args.Exception.Message}");
    }
}

Imports PostSharp.Aspects
Imports System

' Define a logging aspect using OnMethodBoundaryAspect
<Serializable>
Public Class LoggingAspect
	Inherits OnMethodBoundaryAspect

	' Executed before the method is invoked
	Public Overrides Sub OnEntry(ByVal args As MethodExecutionArgs)
		Console.WriteLine($"Entering method {args.Method.Name}.")
	End Sub

	' Executed after the method has completed execution, both on success and failure
	Public Overrides Sub OnExit(ByVal args As MethodExecutionArgs)
		Console.WriteLine($"Exiting method {args.Method.Name}.")
	End Sub

	' Executed when the method throws an exception
	Public Overrides Sub OnException(ByVal args As MethodExecutionArgs)
		Console.WriteLine($"Exception in method {args.Method.Name}: {args.Exception.Message}")
	End Sub
End Class

public class ExampleService
{
    [LoggingAspect]
    public void DoSomething()
    {
        Console.WriteLine("Doing something...");
    }
}

Imports System

Public Class ExampleService
    <LoggingAspect>
    Public Sub DoSomething()
        Console.WriteLine("Doing something...")
    End Sub
End Class

using PostSharp.Aspects;
using IronPdf;
using System;

// Define a PDF generation aspect using OnMethodBoundaryAspect
[Serializable]
public class PdfGenerationAspect : OnMethodBoundaryAspect
{
    // Executed before the method invocation
    public override void OnEntry(MethodExecutionArgs args)
    {
        Console.WriteLine($"Generating PDF for method {args.Method.Name}.");
    }

    // Executed upon the successful completion of the method
    public override void OnSuccess(MethodExecutionArgs args)
    {
        var htmlContent = args.Arguments.GetArgument(0) as string;
        var outputPath = args.Arguments.GetArgument(1) as string;

        // Create an instance of HtmlToPdf class
        var Renderer = new HtmlToPdf();

        // Convert HTML content to PDF
        var pdf = Renderer.RenderHtmlAsPdf(htmlContent);

        // Save the generated PDF to the specified path
        pdf.SaveAs(outputPath);

        Console.WriteLine($"PDF generated successfully at {outputPath}.");
    }

    // Executed when the method throws an exception
    public override void OnException(MethodExecutionArgs args)
    {
        Console.WriteLine($"Exception occurred in method {args.Method.Name}: {args.Exception.Message}");
    }
}

Imports PostSharp.Aspects
Imports IronPdf
Imports System

' Define a PDF generation aspect using OnMethodBoundaryAspect
<Serializable>
Public Class PdfGenerationAspect
	Inherits OnMethodBoundaryAspect

	' Executed before the method invocation
	Public Overrides Sub OnEntry(ByVal args As MethodExecutionArgs)
		Console.WriteLine($"Generating PDF for method {args.Method.Name}.")
	End Sub

	' Executed upon the successful completion of the method
	Public Overrides Sub OnSuccess(ByVal args As MethodExecutionArgs)
		Dim htmlContent = TryCast(args.Arguments.GetArgument(0), String)
		Dim outputPath = TryCast(args.Arguments.GetArgument(1), String)

		' Create an instance of HtmlToPdf class
		Dim Renderer = New HtmlToPdf()

		' Convert HTML content to PDF
		Dim pdf = Renderer.RenderHtmlAsPdf(htmlContent)

		' Save the generated PDF to the specified path
		pdf.SaveAs(outputPath)

		Console.WriteLine($"PDF generated successfully at {outputPath}.")
	End Sub

	' Executed when the method throws an exception
	Public Overrides Sub OnException(ByVal args As MethodExecutionArgs)
		Console.WriteLine($"Exception occurred in method {args.Method.Name}: {args.Exception.Message}")
	End Sub
End Class

public class PdfService
{
    [PdfGenerationAspect] // Apply the PdfGenerationAspect here
    public void GeneratePdf(string htmlContent, string outputPath)
    {
        // Create an instance of HtmlToPdf class
        var Renderer = new HtmlToPdf();

        // Convert HTML content to PDF
        var pdf = Renderer.RenderHtmlAsPdf(htmlContent);

        // Save the generated PDF to the specified path
        pdf.SaveAs(outputPath);
    }
}

Public Class PdfService
	<PdfGenerationAspect>
	Public Sub GeneratePdf(ByVal htmlContent As String, ByVal outputPath As String)
		' Create an instance of HtmlToPdf class
		Dim Renderer = New HtmlToPdf()

		' Convert HTML content to PDF
		Dim pdf = Renderer.RenderHtmlAsPdf(htmlContent)

		' Save the generated PDF to the specified path
		pdf.SaveAs(outputPath)
	End Sub
End Class

class Program
{
    static void Main(string[] args)
    {
        // Create an instance of PdfService
        var pdfService = new PdfService();

        // Define HTML content and output PDF path
        string htmlContent = "<h1>Hello World</h1>";
        string outputPath = "hello_world.pdf";

        // Invoke PDF generation
        pdfService.GeneratePdf(htmlContent, outputPath);
    }
}

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		' Create an instance of PdfService
		Dim pdfService As New PdfService()

		' Define HTML content and output PDF path
		Dim htmlContent As String = "<h1>Hello World</h1>"
		Dim outputPath As String = "hello_world.pdf"

		' Invoke PDF generation
		pdfService.GeneratePdf(htmlContent, outputPath)
	End Sub
End Class