C# 三元运算符（开发者如何使用）

condition ? trueExpression : falseExpression;

If(condition, trueExpression, falseExpression)

int number1 = 10;
int number2 = 15;
int maxNumber = (number1 > number2) ? number1 : number2;
Console.WriteLine("The maximum number is: " + maxNumber);

Dim number1 As Integer = 10
Dim number2 As Integer = 15
Dim maxNumber As Integer = If(number1 > number2, number1, number2)
Console.WriteLine("The maximum number is: " & maxNumber)

    string result = (isSuccess) ? "Operation succeeded" : "Operation failed";

Dim result As String = If(isSuccess, "Operation succeeded", "Operation failed")

    int GetAbsoluteValue(int number) => (number >= 0) ? number : -number;

Private Function GetAbsoluteValue(ByVal number As Integer) As Integer
	Return If(number >= 0, number, -number)
End Function

    Console.WriteLine((isEven) ? "It's an even number" : "It's an odd number");

Console.WriteLine(If(isEven, "It's an even number", "It's an odd number"))

string result = (condition1) ? (condition2) ? "Nested success" : "Nested failure" : "Outer failure";

Dim result As String = If(condition1, If(condition2, "Nested success", "Nested failure"), "Outer failure")

using IronPdf;
class Program
{ 
   static void Main(string [] args)
   {
   // Instantiate Renderer
   var renderer = new ChromePdfRenderer();
   // Create a PDF from an HTML string using C#
   var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>");
   // Export to a file or Stream
   pdf.SaveAs("output.pdf");
   // Advanced Example with HTML Assets
   // Load external html assets: Images, CSS and JavaScript.
   // An optional BasePath 'C:\site\assets\' is set as the file location to load assets from
   var myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", @"C:\site\assets\");
   myAdvancedPdf.SaveAs("html-with-assets.pdf");
   }
}

Imports IronPdf
Friend Class Program
   Shared Sub Main(ByVal args() As String)
   ' Instantiate Renderer
   Dim renderer = New ChromePdfRenderer()
   ' Create a PDF from an HTML string using C#
   Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1>")
   ' Export to a file or Stream
   pdf.SaveAs("output.pdf")
   ' Advanced Example with HTML Assets
   ' Load external html assets: Images, CSS and JavaScript.
   ' An optional BasePath 'C:\site\assets\' is set as the file location to load assets from
   Dim myAdvancedPdf = renderer.RenderHtmlAsPdf("<img src='icons/iron.png'>", "C:\site\assets\")
   myAdvancedPdf.SaveAs("html-with-assets.pdf")
   End Sub
End Class

using IronPdf;
bool isPremiumUser = License.IsLicensed;
var pdf = new ChromePdfRenderer();
var content = (isPremiumUser) ? GeneratePremiumContentFromUser() : GenerateStandardDefaultContent();
pdf.RenderHtmlAsPdf(content).SaveAs("GeneratedDocument.pdf");

Imports IronPdf
Private isPremiumUser As Boolean = License.IsLicensed
Private pdf = New ChromePdfRenderer()
Private content = If(isPremiumUser, GeneratePremiumContentFromUser(), GenerateStandardDefaultContent())
pdf.RenderHtmlAsPdf(content).SaveAs("GeneratedDocument.pdf")

bool isPrintMode = false;
var renderOptions = new ChromePdfRenderOptions();
renderOptions.CssMediaType = (isPrintMode) ? IronPdf.Rendering.PdfCssMediaType.Print : IronPdf.Rendering.PdfCssMediaType.Screen;
var pdfDocument = new ChromePdfRenderer();
pdfDocument.RenderingOptions = renderOptions;
pdfDocument.RenderUrlAsPdf("https://ironpdf.com").Print();

Dim isPrintMode As Boolean = False
Dim renderOptions = New ChromePdfRenderOptions()
renderOptions.CssMediaType = If(isPrintMode, IronPdf.Rendering.PdfCssMediaType.Print, IronPdf.Rendering.PdfCssMediaType.Screen)
Dim pdfDocument = New ChromePdfRenderer()
pdfDocument.RenderingOptions = renderOptions
pdfDocument.RenderUrlAsPdf("https://ironpdf.com").Print()

var includeHeader = true;
var includeFooter = false;
var renderOptions = new ChromePdfRenderOptions();
renderOptions.HtmlHeader = (includeHeader) ? new HtmlHeaderFooter()
{
    BaseUrl = "https://ironpdf.com",
    DrawDividerLine = true
} : null;
renderOptions.HtmlFooter = (includeFooter) ? new HtmlHeaderFooter() : null;
var pdf = new ChromePdfRenderer();
pdf.RenderingOptions = renderOptions;
pdf.RenderHtmlAsPdf("<html><body><h1>PDF with Header and Footer</h1></body></html>").SaveAs("ConditionalHeaderFooter.pdf");

Dim includeHeader = True
Dim includeFooter = False
Dim renderOptions = New ChromePdfRenderOptions()
renderOptions.HtmlHeader = If(includeHeader, New HtmlHeaderFooter() With {
	.BaseUrl = "https://ironpdf.com",
	.DrawDividerLine = True
}, Nothing)
renderOptions.HtmlFooter = If(includeFooter, New HtmlHeaderFooter(), Nothing)
Dim pdf = New ChromePdfRenderer()
pdf.RenderingOptions = renderOptions
pdf.RenderHtmlAsPdf("<html><body><h1>PDF with Header and Footer</h1></body></html>").SaveAs("ConditionalHeaderFooter.pdf")