C# URL Encode (How It Works For Developers)

link管理

链接快照平台

输入网页链接，自动生成快照
标签化管理网页链接

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class="nuget-icon-white2 nuget-icon-white2--top-1"/> <span>Free NuGet Download</span> <i class="navbar__item-icon fas fa-chevron-right fa-chevron-right--font-size-13"/> </a><a class="js-modal-open banner__link-white-text banner__link-white-text--start-free-trial" data-modal-id="trial-license" href="#trial-license"><i class="fas fa-key"/> Start Free Trial</a></div></div><div class="tutorial-examples tutorial-examples--blog col-md-7" id="code-examples"><div class="tutorial-examples__background-linear-gradient"/><div class="examples-box examples-box_margin-left examples-box--ironpdf-blog"><div class="hidden col left-bar"><h2 style="font-family: 'Gotham-Black';">Examples</h2><div id="code-dropdown"><select class="selectpicker" data-style="btn-iron" data-width="100%"/></div><div class="nav-side-menu" style="height: 277px;"><i class="fa fa-bars fa-2x toggle-btn" data-toggle="collapse" data-target="#menu-content"/><div class="menu-list"><ul id="menu-content" class="menu-content collapse out" data-collapse-proxy="#code-dropdown select"><li data-code-content="sample-csharp-url-encode" data-hash-url="true"><a href="javascript:void(0)">Create a PDF Encoded Text. See the results in action!</a></li></ul></div></div></div><div class="col right-bar"><div class="code-content lander show" id="sample-csharp-url-encode"><div class="code_window add-shadow"><div class="code_window_title"><span style="margin-right: 10px;"><i class="vs-icon2"/> </span><span class="filename" style="margin-left: 0; margin-right: 19px;">Create a PDF Encoded Text. See the results in action!</span></div><div class="code_window_content"><div class="code-window__action-buttons-wrapper"><button title="Click to copy" class="code-window__action-button code-window__action-button--copy copy-clipboard" data-copy-text="Click to copy" data-copied-text="Copied to clipboard" data-clipboard-id="code-explorer" data-placement="bottom"><i class="fa-kit fa-copy-example"/></button> <button title="Full Screen Mode" class="code-window__action-button code-window__action-button--full-screen js-full-screen-code-example-modal"><i class="fas fa-expand"/></button> <button title="Exit Full Screen" class="code-window__action-button code-window__action-button--exit-full-screen js-exit-full-screen-code-example-modal"><i class="fas fa-compress"/></button></div><pre class="prettyprint linenums lang-cs"><code>using IronPdf; using System; using System.Web; var textToEncode = "This is a test string with special characters: !@#$%^&amp;*()"; var encodedText = HttpUtility.UrlEncode(textToEncode); var htmlContent = $"&lt;h1&gt;URL Encoded PDF&lt;/h1&gt;&lt;p&gt;Original Text: {textToEncode}&lt;/p&gt;&lt;p&gt;URL Encoded Text: {encodedText}&lt;/p&gt;"; // Initialize ChromePdfRenderer var renderer = new ChromePdfRenderer(); // Render the HTML content as PDF var pdfDocument = renderer.RenderHtmlAsPdf(htmlContent); // Save the PDF file pdfDocument.SaveAs("URLEncodedExample.pdf"); Console.WriteLine("PDF saved as URLEncodedExample.pdf");</code></pre></div><div class="code_window_bottom"/></div><div class="copy-nuget-section copy-nuget-section--blog-ab-test" data-bs-toggle="tooltip" data-bs-placement="top" data-bs-title="Click to copy" data-bs-custom-class="tooltipCopyToClipboardWhite" data-copy-text="Click to copy" data-copied-text="Copied to clipboard"><div class="copy-nuget-row vwo-nuget-copy"><div class="nuget-icon-continaer"><a id="js-nuget-icon-continaer" class="nuget-icon-continaer__link js-modal-open" href="https://www.nuget.org/packages/IronPdf" target="_blank" title="Visit IronPDF NuGet Page" data-modal-id="trial-license-after-download"><img src="https://img.shields.io/nuget/dt/IronPdf?style=flat&amp;logo=nuget&amp;label=Downloads&amp;labelColor=4D4D4D&amp;color=4382BF&amp;cacheSeconds=432000" alt="" loading="lazy" class="nuget-icon-continaer__nuget-badge"/></a></div><pre class="install-script install-script--product-homepage">Install-Package IronPdf</pre><div class="copy-button text-end"><button class="btn btn-default copy-nuget-script" type="button" data-toggle="popover" data-placement="bottom" data-content="Copy the Package Manager command" aria-label="Copy the Package Manager command" data-original-title="" title=""><span class="fas copy-icon-white"/></button></div></div></div></div></div></div></div><img loading="lazy" class="add-shadow banner__product-home-top-image banner__product-home-top-image--right-ironpdf" src="/img/svgs/illustration2.svg" alt="IronPDF"/></div></div></header><main class="page_type_product page_blog_post"><section class="section_header"><div class="container-fluid"><ol class="breadcrumb"><li class="breadcrumb-item"><a href="/">IronPDF</a></li><li class="breadcrumb-item"><a href="/blog/">IronPDF Blog</a></li><li class="breadcrumb-item"><a href="/blog/net-help/">.NET Help</a></li><li class="breadcrumb-item active">csharp-url-encode</li></ol></div></section><div class="container-fluid"><div class="row g-5"><div class="col-12 col-md-8"><div class="blog_category_name">.NET HELP</div><h1>C# URL Encode (How It Works For Developers)</h1><div class="d-flex my-4 gap-3 align-items-center"><div class="blog_date flex-grow-1">Published April 3, 2024</div><div class="d-flex blog_social_icons align-items-center"><div class="text">Share:</div><div class="icon"><a href="https://www.facebook.com/sharer/sharer.php?u=https://ironpdf.com/blog/net-help/csharp-url-encode/" title="Share on Facebook" target="_blank"><i class="fa-brands fa-facebook"/></a></div><div class="icon"><a href="https://twitter.com/intent/tweet?url=https://ironpdf.com/blog/net-help/csharp-url-encode/" title="Share on Twitter (X Platform)" target="_blank"><i class="fa-brands fa-x-twitter"/></a></div><div class="icon"><a href="https://www.linkedin.com/sharing/share-offsite/?url=https://ironpdf.com/blog/net-help/csharp-url-encode/" title="Share on Linkedin" target="_blank"><i class="fa-brands fa-linkedin"/></a></div><div class="icon"><a href="https://ironpdf.com/blog/net-help/csharp-url-encode/" title="Copy link to share" target="_blank" class="js-copyPageURLToClipboard" data-text-after-clicked="&lt;i class='fa-solid fa-check'&gt;&lt;/i&gt;"><i class="fa-regular fa-copy"/></a></div></div></div><div class="blog_content" data-bs-spy="scroll" data-bs-target="#blog_right_scrollspy_menu" data-bs-root-margin="0px 0px -75%" data-bs-smooth-scroll="true" tabindex="0"><h2 id="anchor-introduction">Introduction</h2><p><a href="https://learn.microsoft.com/en-us/dotnet/api/system.web.httputility.urlencode?view=net-8.0" target="_blank" rel="nofollow noopener noreferrer"><strong>URL encoding</strong></a> and decoding are techniques used in the C# to ensure the safe transmission of data within URLs. In C#, these operations are commonly encountered when dealing with web applications, API calls, or any scenario where data needs to be passed through the internet securely and reliably. In this article, we'll explore the URL encoding method and the <a href="/" target="_blank" rel="nofollow noopener noreferrer"><strong>IronPDF library</strong></a>.</p><h3 id="anchor-url-encoding-in-c-num">URL Encoding in C&amp;num;</h3><p>When you encode a URL, you change its characters into a form that can be safely sent across the internet, avoiding any misunderstandings. This is because URLs can only be sent over the Internet using the ASCII character set. Characters that aren't part of this set, or have special meanings in URLs (like spaces, ampersands, and equals signs), need to be represented using percent-encoding (e.g., spaces become <strong>%20</strong>). C# provides built-in methods to accomplish this task.</p><h3 id="anchor-url-decoding-in-c-num">URL Decoding in C&amp;num;</h3><p>URL decoding transforms encoded characters back to their original state upon arrival at their destination. This is essential for the receiving application to correctly understand and process the data as intended. Decoding turns the percent-encoded characters back into their original symbols, making the data readable and usable again.</p><h2 id="anchor-encoding-methods-in-c-num">Encoding Methods in C&amp;num;</h2><p>In C#, there are multiple ways to perform URL encoding, each suited for different scenarios. These methods are primarily found within the <strong>System.Web</strong> and <strong>System.Net</strong> namespaces, offering developers flexibility in how they encode URLs. Here's a brief overview of the methods available:</p><ol><li><strong>HttpUtility.UrlEncode Method (System.Web)</strong>: This is perhaps the most commonly used method for URL encoding in a web application. It converts characters into a percent-encoded format, making the string safe for transmission over the URL. It's especially useful in ASP.NET projects for encoding query strings and form parameters.</li><li><strong>HttpUtility.UrlPathEncode Method (System.Web)</strong>: Unlike <strong>UrlEncode</strong>, <strong>UrlPathEncode</strong> is designed specifically for encoding the path portion of a URL, leaving the query string untouched. It's important to note that this method does not encode the entire URL but rather the path part, ensuring that the hierarchical structure of the URL is preserved.</li><li><strong>Uri.EscapeUriString Method (System)</strong>: This method is intended for escaping URI strings, turning all characters that are not allowed in a URI into their percent-encoded equivalents. However, it does not encode certain characters, such as the slash (<strong>/</strong>) and question mark (<strong>?</strong>), because they are considered valid URI characters.</li><li><strong>Uri.EscapeDataString Method (System)</strong>: This method is designed for encoding a string to be used in a query part of a URI. It encodes all characters except for the unreserved characters defined in RFC 3986. It's more aggressive than <strong>EscapeUriString</strong>, ensuring that the data is safely encoded for transmission within URLs.</li></ol><p>Let's understand the first three encoding methods as described above, and their working by understanding their code examples.</p><h3 id="anchor-code-example-of-httputility-urlencode-method">Code Example of HttpUtility.UrlEncode Method</h3><pre class="naked-code"><code class="language-cs">using System; using System.Web; class Program static void Main() string originalPath = "/api/search/Hello World!"; string encodedPath = UrlEncode(originalPath); Console.WriteLine("Original Path: " + originalPath); Console.WriteLine("Encoded Path: " + encodedPath); public static string UrlEncode(string originalString) return HttpUtility.UrlEncode(originalString); }</code></pre><div class="code-content code-content-inner"><div class="code_window"><div class="language-selection__content-page-wrapper"/><div class="code_window_content"><div class="code-window__action-buttons-wrapper code-window__action-buttons-wrapper--content-page"><button title="Click to copy" class="code-window__action-button code-window__action-button--copy copy-clipboard" data-copy-text="Click to copy" data-copied-text="Copied to clipboard" data-clipboard-id="code-explorer" data-placement="bottom"><i class="fa-kit fa-copy-example"/></button> <button title="Full Screen Mode" class="code-window__action-button code-window__action-button--full-screen js-full-screen-code-example-modal"><i class="fas fa-expand"/></button> <button title="Exit Full Screen" class="code-window__action-button code-window__action-button--exit-full-screen js-exit-full-screen-code-example-modal"><i class="fas fa-compress"/></button></div><pre class="prettyprint linenums lang-cs"><code>using System; using System.Web; class Program static void Main() string originalPath = "/api/search/Hello World!"; string encodedPath = UrlEncode(originalPath); Console.WriteLine("Original Path: " + originalPath); Console.WriteLine("Encoded Path: " + encodedPath); public static string UrlEncode(string originalString) return HttpUtility.UrlEncode(originalString); }</code></pre><pre class="prettyprint linenums lang-vb"><code>Imports System&#13; Imports System.Web&#13; Friend Class Program&#13; Shared Sub Main()&#13; Dim originalPath As String = "/api/search/Hello World!"&#13; Dim encodedPath As String = UrlEncode(originalPath)&#13; Console.WriteLine("Original Path: " &amp; originalPath)&#13; Console.WriteLine("Encoded Path: " &amp; encodedPath)&#13; End Sub&#13; Public Shared Function UrlEncode(ByVal originalString As String) As String&#13; Return HttpUtility.UrlEncode(originalString)&#13; End Function&#13; End Class</code></pre></div><div class="code_window_bottom"><span class="language_selection"><span class="ls-span">VB </span> <span><label class="switch"><input type="checkbox" checked="checked"/> <span class="slider round"/></label> </span><span class="ls-span">C#</span></span></div></div></div><p><strong>Namespace Inclusion</strong>: The <strong>System.Web</strong> namespace is included at the beginning of the code.</p><p><strong>Original String</strong>: We define a string variable <strong>originalString</strong> containing the characters to encode for safe transmission in a URL. This includes spaces and punctuation marks that could potentially cause issues if included in a URL without encoding.</p><p><strong>Encoding</strong>: The HttpUtility.UrlEncode method is called with <strong>originalString</strong> as its argument. This method processes the string and returns a new string where unsafe characters are replaced with their percent-encoded equivalents. For example, spaces are replaced with <strong>%20</strong>.</p><p><strong>Output</strong>: Finally, the program prints both the original and encoded strings to the console.</p><p><img src="/static-assets/pdf/blog/csharp-url-encode/csharp-url-encode-1.webp" alt="C# URL Encode (How It Works For Developers): Figure 1 - Console output showing the original and encoded strings " loading="lazy" class="img-responsive add-shadow img-popup" width="568" height="411"/></p><h3 id="anchor-code-example-of-httputility-urlpathencode-method">Code Example of HttpUtility.UrlPathEncode Method</h3><pre class="naked-code"><code class="language-cs">using System; using System.Web; class Program static void Main() // Define the original URL path, which includes spaces. string originalPath = "/api/search/Hello World!"; // Use the HttpUtility.UrlPathEncode method to encode the path. string encodedPath = HttpUtility.UrlPathEncode(originalPath); // Output the original and encoded paths to the console. Console.WriteLine("Original Path: " + originalPath); Console.WriteLine("Encoded Path: " + encodedPath); }</code></pre><div class="code-content code-content-inner"><div class="code_window"><div class="language-selection__content-page-wrapper"/><div class="code_window_content"><div class="code-window__action-buttons-wrapper code-window__action-buttons-wrapper--content-page"><button title="Click to copy" class="code-window__action-button code-window__action-button--copy copy-clipboard" data-copy-text="Click to copy" data-copied-text="Copied to clipboard" data-clipboard-id="code-explorer" data-placement="bottom"><i class="fa-kit fa-copy-example"/></button> <button title="Full Screen Mode" class="code-window__action-button code-window__action-button--full-screen js-full-screen-code-example-modal"><i class="fas fa-expand"/></button> <button title="Exit Full Screen" class="code-window__action-button code-window__action-button--exit-full-screen js-exit-full-screen-code-example-modal"><i class="fas fa-compress"/></button></div><pre class="prettyprint linenums lang-cs"><code>using System; using System.Web; class Program static void Main() // Define the original URL path, which includes spaces. string originalPath = "/api/search/Hello World!"; // Use the HttpUtility.UrlPathEncode method to encode the path. string encodedPath = HttpUtility.UrlPathEncode(originalPath); // Output the original and encoded paths to the console. Console.WriteLine("Original Path: " + originalPath); Console.WriteLine("Encoded Path: " + encodedPath); }</code></pre><pre class="prettyprint linenums lang-vb"><code>Imports System&#13; Imports System.Web&#13; Friend Class Program&#13; Shared Sub Main()&#13; ' Define the original URL path, which includes spaces.&#13; Dim originalPath As String = "/api/search/Hello World!"&#13; ' Use the HttpUtility.UrlPathEncode method to encode the path.&#13; Dim encodedPath As String = HttpUtility.UrlPathEncode(originalPath)&#13; ' Output the original and encoded paths to the console.&#13; Console.WriteLine("Original Path: " &amp; originalPath)&#13; Console.WriteLine("Encoded Path: " &amp; encodedPath)&#13; End Sub&#13; End Class</code></pre></div><div class="code_window_bottom"><span class="language_selection"><span class="ls-span">VB </span> <span><label class="switch"><input type="checkbox" checked="checked"/> <span class="slider round"/></label> </span><span class="ls-span">C#</span></span></div></div></div><p><strong>Character Entity Equivalents in URL Encoding:</strong> The process shown transforms the string value of a URL path, converting spaces into their character entity equivalents (%20) for web compatibility. This is crucial because URLs cannot contain actual space characters.</p><p><strong>String Value and URL String Handling:</strong> The <strong>originalPath</strong> variable's string value is "/api/search/Hello World!", which is a typical example of a URL string needing encoding due to the inclusion of spaces.</p><p>Although this example uses a specific version of <strong>HttpUtility.UrlPathEncode</strong> without method overloads, it's important to note the method's design intention for encoding URL paths. Developers should be aware of method overloads when they exist, as they provide alternative ways to use a method, often by accepting different types of input or providing additional functionality.</p><p><strong>Encoding Object and String URL Transformation:</strong> The encoding object in this context is implicit in the HttpUtility.UrlPathEncode method's operation, which takes a string URL and returns its encoded form. This method ensures that the structure of the URL path remains intact while encoding special characters to their appropriate representations.</p><p><strong>Encoded Path Output:</strong> The program demonstrates the transformation from the original path to the encoded path. This is a direct example of encoding a string URL to adapt it for web transmission, addressing the potential issues spaces and other special characters might introduce.</p><p><img src="/static-assets/pdf/blog/csharp-url-encode/csharp-url-encode-2.webp" alt="C# URL Encode (How It Works For Developers): Figure 2 - Console output showing the original and encoded strings " loading="lazy" class="img-responsive add-shadow img-popup" width="695" height="451"/></p><h3 id="anchor-code-example-of-uri-escapeuristring-method">Code Example of Uri.EscapeUriString Method</h3><pre class="naked-code"><code class="language-cs">using System; class Program static void Main() string originalUri = "https://example.com/search?query=Hello World!"; string escapedUri = Uri.EscapeUriString(originalUri); Console.WriteLine("Original URI: " + originalUri); Console.WriteLine("Escaped URI: " + escapedUri); }</code></pre><div class="code-content code-content-inner"><div class="code_window"><div class="language-selection__content-page-wrapper"/><div class="code_window_content"><div class="code-window__action-buttons-wrapper code-window__action-buttons-wrapper--content-page"><button title="Click to copy" class="code-window__action-button code-window__action-button--copy copy-clipboard" data-copy-text="Click to copy" data-copied-text="Copied to clipboard" data-clipboard-id="code-explorer" data-placement="bottom"><i class="fa-kit fa-copy-example"/></button> <button title="Full Screen Mode" class="code-window__action-button code-window__action-button--full-screen js-full-screen-code-example-modal"><i class="fas fa-expand"/></button> <button title="Exit Full Screen" class="code-window__action-button code-window__action-button--exit-full-screen js-exit-full-screen-code-example-modal"><i class="fas fa-compress"/></button></div><pre class="prettyprint linenums lang-cs"><code>using System; class Program static void Main() string originalUri = "https://example.com/search?query=Hello World!"; string escapedUri = Uri.EscapeUriString(originalUri); Console.WriteLine("Original URI: " + originalUri); Console.WriteLine("Escaped URI: " + escapedUri); }</code></pre><pre class="prettyprint linenums lang-vb"><code>Imports System&#13; Friend Class Program&#13; Shared Sub Main()&#13; Dim originalUri As String = "https://example.com/search?query=Hello World!"&#13; Dim escapedUri As String = Uri.EscapeUriString(originalUri)&#13; Console.WriteLine("Original URI: " &amp; originalUri)&#13; Console.WriteLine("Escaped URI: " &amp; escapedUri)&#13; End Sub&#13; End Class</code></pre></div><div class="code_window_bottom"><span class="language_selection"><span class="ls-span">VB </span> <span><label class="switch"><input type="checkbox" checked="checked"/> <span class="slider round"/></label> </span><span class="ls-span">C#</span></span></div></div></div><p><strong>Original URI</strong>: The <strong>originalUri</strong> variable is initialized with a string representing a full URI, including a query string with spaces and special characters. To ensure the URI is correctly processed by web browsers and servers, these special characters need to be 'escaped'.</p><p><strong>Escaping the URI</strong>: The <strong>Uri.EscapeUriString</strong> method is invoked with <strong>originalUri</strong> as its argument. This method scans the URI string and escapes characters that are not allowed or could cause ambiguity in a URI.</p><p><strong>Output</strong>: The program prints both the original and the escaped URI to the console.</p><p><img src="/static-assets/pdf/blog/csharp-url-encode/csharp-url-encode-3.webp" alt="C# URL Encode (How It Works For Developers): Figure 3 - Console output showing the original and encoded strings " loading="lazy" class="img-responsive add-shadow img-popup" width="776" height="411"/></p><h2 id="anchor-ironpdf-c-num-pdf-library">IronPDF: C&amp;num; PDF Library</h2><p><img src="/static-assets/pdf/blog/csharp-url-encode/csharp-url-encode-4.webp" alt="C# URL Encode (How It Works For Developers): Figure 4 - IronPDF webpage" loading="lazy" class="img-responsive add-shadow img-popup" width="1813" height="818"/></p><p><a href="/" target="_blank" rel="nofollow noopener noreferrer"><strong>IronPDF</strong></a> is a PDF library that simplifies creating, editing, and manipulating PDF files within .NET applications. Designed to seamlessly integrate with C# and VB.NET, IronPDF offers developers the functions to <a href="/examples/using-html-to-create-a-pdf/" target="_blank" rel="nofollow noopener noreferrer"><strong>generate PDFs from HTML</strong></a> or directly from text. Whether you need to automate invoice generation, create dynamic reports, or manage documents in a .NET environment, IronPDF stands out for its ease of use and comprehensive set of features.</p><p>The highlight of IronPDF is its <a href="/tutorials/html-to-pdf/" target="_blank" rel="nofollow noopener noreferrer">HTML to PDF</a> feature, maintaining your layouts and styles. This allows for PDF creation from web content, perfect for reports, invoices, and documentation. HTML files, URLs, and HTML strings can be converted to PDFs easily.</p><pre class="naked-code"><code class="language-cs">using IronPdf; class Program static void Main(string[] args) var renderer = new ChromePdfRenderer(); // 1. Convert HTML String to PDF var htmlContent = "&lt;h1&gt;Hello, IronPDF!&lt;/h1&gt;&lt;p&gt;This is a PDF from an HTML string.&lt;/p&gt;"; 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"); }</code></pre><div class="code-content code-content-inner"><div class="code_window"><div class="language-selection__content-page-wrapper"/><div class="code_window_content"><div class="code-window__action-buttons-wrapper code-window__action-buttons-wrapper--content-page"><button title="Click to copy" class="code-window__action-button code-window__action-button--copy copy-clipboard" data-copy-text="Click to copy" data-copied-text="Copied to clipboard" data-clipboard-id="code-explorer" data-placement="bottom"><i class="fa-kit fa-copy-example"/></button> <button title="Full Screen Mode" class="code-window__action-button code-window__action-button--full-screen js-full-screen-code-example-modal"><i class="fas fa-expand"/></button> <button title="Exit Full Screen" class="code-window__action-button code-window__action-button--exit-full-screen js-exit-full-screen-code-example-modal"><i class="fas fa-compress"/></button></div><pre class="prettyprint linenums lang-cs"><code>using IronPdf; class Program static void Main(string[] args) var renderer = new ChromePdfRenderer(); // 1. Convert HTML String to PDF var htmlContent = "&lt;h1&gt;Hello, IronPDF!&lt;/h1&gt;&lt;p&gt;This is a PDF from an HTML string.&lt;/p&gt;"; 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"); }</code></pre><pre class="prettyprint linenums lang-vb"><code>Imports IronPdf&#13; Friend Class Program&#13; Shared Sub Main(ByVal args() As String)&#13; Dim renderer = New ChromePdfRenderer()&#13; ' 1. Convert HTML String to PDF&#13; Dim htmlContent = "&lt;h1&gt;Hello, IronPDF!&lt;/h1&gt;&lt;p&gt;This is a PDF from an HTML string.&lt;/p&gt;"&#13; Dim pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent)&#13; pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf")&#13; ' 2. Convert HTML File to PDF&#13; Dim htmlFilePath = "path_to_your_html_file.html" ' Specify the path to your HTML file&#13; Dim pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath)&#13; pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf")&#13; ' 3. Convert URL to PDF&#13; Dim url = "http://ironpdf.com" ' Specify the URL&#13; Dim pdfFromUrl = renderer.RenderUrlAsPdf(url)&#13; pdfFromUrl.SaveAs("URLToPDF.pdf")&#13; End Sub&#13; End Class</code></pre></div><div class="code_window_bottom"><span class="language_selection"><span class="ls-span">VB </span> <span><label class="switch"><input type="checkbox" checked="checked"/> <span class="slider round"/></label> </span><span class="ls-span">C#</span></span></div></div></div><h3 id="anchor-working-code-example-with-url-encoding">Working Code Example with URL Encoding</h3><p>In the following example, we'll see how to use IronPDF in conjunction with URL encoding to generate a PDF from a web page. The scenario involves encoding a URL to ensure it's correctly formatted for web requests, then using IronPDF to convert the content at that URL into a PDF document.</p><h4 id="anchor-install-ironpdf-library">Install IronPDF Library</h4><p>First, ensure you have IronPDF installed in your project. If you're using NuGet Package Manager, you can install it by running:</p><div class="copy-nuget-section md-body net" data-toggle="tooltip" data-placement="top" title="Click to copy" data-copy-text="Click to copy" data-copied-text="Copied to clipboard"><pre class="install-script">Install-Package IronPdf</pre></div><h4 id="anchor-code-example">Code Example</h4><p>Now, let's dive into the code:</p><pre class="naked-code"><code class="language-cs">using System.Web; using IronPdf; License.LicenseKey = "License-Key"; string baseUrl = "https://example.com/search"; // The query parameter with spaces that needs to be encoded string query = "Hello World!"; // Encoding the query parameter to ensure the URL is correctly formatted string encodedQuery = HttpUtility.UrlEncode(query); // Constructing the full URL with the encoded query parameter string fullUrl = $"{baseUrl}?query={encodedQuery}"; // Initialize the IronPDF HtmlToPdf renderer var renderer = new ChromePdfRenderer(); // Convert the web page at the encoded URL to a PDF document var pdf = renderer.RenderUrlAsPdf(fullUrl); // Save the PDF to a file string filePath = "webpage.pdf"; pdf.SaveAs(filePath); Console.WriteLine($"PDF successfully created from: {fullUrl}"); Console.WriteLine($"Saved to: {filePath}");</code></pre><div class="code-content code-content-inner"><div class="code_window"><div class="language-selection__content-page-wrapper"/><div class="code_window_content"><div class="code-window__action-buttons-wrapper code-window__action-buttons-wrapper--content-page"><button title="Click to copy" class="code-window__action-button code-window__action-button--copy copy-clipboard" data-copy-text="Click to copy" data-copied-text="Copied to clipboard" data-clipboard-id="code-explorer" data-placement="bottom"><i class="fa-kit fa-copy-example"/></button> <button title="Full Screen Mode" class="code-window__action-button code-window__action-button--full-screen js-full-screen-code-example-modal"><i class="fas fa-expand"/></button> <button title="Exit Full Screen" class="code-window__action-button code-window__action-button--exit-full-screen js-exit-full-screen-code-example-modal"><i class="fas fa-compress"/></button></div><pre class="prettyprint linenums lang-cs"><code>using System.Web; using IronPdf; License.LicenseKey = "License-Key"; string baseUrl = "https://example.com/search"; // The query parameter with spaces that needs to be encoded string query = "Hello World!"; // Encoding the query parameter to ensure the URL is correctly formatted string encodedQuery = HttpUtility.UrlEncode(query); // Constructing the full URL with the encoded query parameter string fullUrl = $"{baseUrl}?query={encodedQuery}"; // Initialize the IronPDF HtmlToPdf renderer var renderer = new ChromePdfRenderer(); // Convert the web page at the encoded URL to a PDF document var pdf = renderer.RenderUrlAsPdf(fullUrl); // Save the PDF to a file string filePath = "webpage.pdf"; pdf.SaveAs(filePath); Console.WriteLine($"PDF successfully created from: {fullUrl}"); Console.WriteLine($"Saved to: {filePath}");</code></pre><pre class="prettyprint linenums lang-vb"><code>Imports System.Web&#13; Imports IronPdf&#13; License.LicenseKey = "License-Key"&#13; Dim baseUrl As String = "https://example.com/search"&#13; ' The query parameter with spaces that needs to be encoded&#13; Dim query As String = "Hello World!"&#13; ' Encoding the query parameter to ensure the URL is correctly formatted&#13; Dim encodedQuery As String = HttpUtility.UrlEncode(query)&#13; ' Constructing the full URL with the encoded query parameter&#13; Dim fullUrl As String = $"{baseUrl}?query={encodedQuery}"&#13; ' Initialize the IronPDF HtmlToPdf renderer&#13; Dim renderer = New ChromePdfRenderer()&#13; ' Convert the web page at the encoded URL to a PDF document&#13;