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How to Use the WaitFor to delay C# PDF Rendering

In this comprehensive tutorial, we delve into using IronPDF's WaitFor Class to delay PDF rendering in C#. Begin by installing the IronPDF package and setting up your project with the necessary imports and a valid license key. Learn about initializing a render object with Chrome PDF render and configuring immediate page load rendering using default settings. The tutorial further explores setting custom rendering delays, such as a 3,000-millisecond delay after page load, and how to save the generated PDF with the SaveAs method.

We discuss scenarios involving font readiness, utilizing the WaitFor.AllFontsLoaded method to ensure all fonts are loaded before rendering. Additionally, the tutorial demonstrates executing JavaScript within HTML strings to notify IronPDF to proceed with rendering after a delay. You'll learn to wait for specific HTML elements to load using methods like WaitFor.HtmlElementById and WaitFor.HtmlElementByName, crucial for scenarios requiring complete content loading before PDF generation.

Network conditions are also addressed, explaining the NetworkIdle conditions, which dictate rendering based on network activity levels. The tutorial concludes with executing the application to observe the rendering behaviors, showcasing how delay mechanisms and JavaScript interactions impact the final PDF document. By following these steps, you'll effectively leverage IronPDF's WaitFor Class to manage delays and execute JavaScript for precise PDF generation in your .NET applications.

In this code:

  • We create an HtmlToPdf object from IronPDF to manage our PDF rendering settings.
  • WaitFor.AllFontsLoaded ensures that all fonts are fully loaded before the rendering process starts, avoiding any font-related issues in the final document.
  • We demonstrate how to implement a custom delay using JavaScript that prompts IronPDF to start rendering 3 seconds post-load.
  • Using the SaveAs method, the generated PDF is saved to the specified path, ensuring the document is available for further use or distribution.

Further Reading: How to Use the WaitFor Class to Delay C# PDF Rendering

Chipego
Software Engineer
Chipego has a natural skill for listening that helps him to comprehend customer issues, and offer intelligent solutions. He joined the Iron Software team in 2023, after studying a Bachelor of Science in Information Technology. IronPDF and IronOCR are the two products Chipego has been focusing on, but his knowledge of all products is growing daily, as he finds new ways to support customers. He enjoys how collaborative life is at Iron Software, with team members from across the company bringing their varied experience to contribute to effective, innovative solutions. When Chipego is away from his desk, he can often be found enjoying a good book or playing football.