C# 擴充方法（開發人員如何使用）

public static class StringExtensions
{
   public static string Reverse(this string input)
   {
       char[] chars = input.ToCharArray();
       Array.Reverse(chars);
       return new string(chars);
   }
}

Public Module StringExtensions
   <System.Runtime.CompilerServices.Extension> _
   Public Function Reverse(ByVal input As String) As String
	   Dim chars() As Char = input.ToCharArray()
	   Array.Reverse(chars)
	   Return New String(chars)
   End Function
End Module

class Program
{
   static void Main(string[] args)
   {
       string example = "Hello, World!";
       string reversed = example.Reverse();
       Console.WriteLine(reversed); // !dlroW ,olleH
   }
}

Friend Class Program
   Shared Sub Main(ByVal args() As String)
	   Dim example As String = "Hello, World!"
	   Dim reversed As String = example.Reverse()
	   Console.WriteLine(reversed) ' !dlroW ,olleH
   End Sub
End Class

public static class StringExtensions
{
   public static int WordCount(this string input)
   {
       return input.Split(new[] { ' ', '\t', '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries).Length;
   }
}

IRON VB CONVERTER ERROR developers@ironsoftware.com

string text = "Extension methods are awesome!";
int wordCount = text.WordCount();
Console.WriteLine($"The text has {wordCount} words."); // The text has 4 words.

Dim text As String = "Extension methods are awesome!"
Dim wordCount As Integer = text.WordCount()
Console.WriteLine($"The text has {wordCount} words.") ' The text has 4 words.

public static class EnumerableExtensions
{
   public static double Median(this IEnumerable source)
   {
       int[] sorted = source.OrderBy(x => x).ToArray();
       int count = sorted.Length;

       if (count == 0)
       {
           throw new InvalidOperationException("The collection is empty.");
       }

       if (count % 2 == 0)
       {
           return (sorted[count / 2 - 1] + sorted[count / 2]) / 2.0;
       }
       else
       {
           return sorted[count / 2];
       }
   }
}

IRON VB CONVERTER ERROR developers@ironsoftware.com

int[] numbers = { 5, 3, 9, 1, 4 };
double median = numbers.Median();
Console.WriteLine($"The median value is {median}."); // The median value is 4.

Dim numbers() As Integer = { 5, 3, 9, 1, 4 }
Dim median As Double = numbers.Median()
Console.WriteLine($"The median value is {median}.") ' The median value is 4.

public static class DateTimeExtensions
{
   public static DateTime StartOfWeek(this DateTime dt, DayOfWeek startOfWeek = DayOfWeek.Monday)
   {
       int diff = (7 + (dt.DayOfWeek - startOfWeek)) % 7;
       return dt.AddDays(-1 * diff).Date;
   }
}

IRON VB CONVERTER ERROR developers@ironsoftware.com

DateTime today = DateTime.Today;
DateTime startOfWeek = today.StartOfWeek();
Console.WriteLine($"The start of the week is {startOfWeek.ToShortDateString()}."); // The start of the week is 17/06/2024.

IRON VB CONVERTER ERROR developers@ironsoftware.com

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;

class Program
{
   static void Main(string[] args)
   {
       var renderer = new ChromePdfRenderer();;
       var PDF = renderer.RenderHtmlAsPdf("Hello, World!");
       PDF.SaveAs("HelloWorld.PDF");
   }
}

Imports IronPdf

Friend Class Program
   Shared Sub Main(ByVal args() As String)
	   Dim renderer = New ChromePdfRenderer()
	   Dim PDF = renderer.RenderHtmlAsPdf("Hello, World!")
	   PDF.SaveAs("HelloWorld.PDF")
   End Sub
End Class

public static class StringExtensions
{
   public static void SaveAsPdf(this string htmlContent, string filePath)
   {
       var renderer = new ChromePdfRenderer();;
       var PDF = renderer.RenderHtmlAsPdf(htmlContent);
       PDF.SaveAs(filePath);
   }
}

IRON VB CONVERTER ERROR developers@ironsoftware.com

string html = "Extension Methods and IronPDFGenerating PDFs has never been easier!";
html.SaveAsPdf("ExtensionMethodsAndIronPDF.PDF");

Dim html As String = "Extension Methods and IronPDFGenerating PDFs has never been easier!"
html.SaveAsPdf("ExtensionMethodsAndIronPDF.PDF")

public static class UriExtensions
{
   public static void SaveAsPdf(this Uri url, string filePath)
   {
       var renderer = new ChromePdfRenderer();;
       var PDF = renderer.RenderUrlAsPdf(url.AbsoluteUri);
       PDF.SaveAs(filePath);
   }
}

IRON VB CONVERTER ERROR developers@ironsoftware.com

Uri url = new Uri("https://www.ironpdf.com/");
url.SaveAsPdf("UrlToPdf.PDF");

Dim url As New Uri("https://www.ironpdf.com/")
url.SaveAsPdf("UrlToPdf.PDF")