Скачать или смотреть How to Convert System.Drawing.Font to PdfSharp.Drawing.XFont with Correct Size

Learn how to properly create `XFont` objects from `System.Drawing.Font` in C# while maintaining the correct size for your PDFs using PdfSharp.
---
This video is based on the question https://stackoverflow.com/q/63398956/ asked by the user 'vpetrovic' ( https://stackoverflow.com/u/3897471/ ) and on the answer https://stackoverflow.com/a/63410709/ provided by the user 'vpetrovic' ( https://stackoverflow.com/u/3897471/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Convert System.Drawing.Font to PdfSharp.Drawing.XFont

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Converting System.Drawing.Font to PdfSharp.Drawing.XFont: A Step-by-Step Guide

Are you struggling with converting a System.Drawing.Font to a PdfSharp.Drawing.XFont and maintaining the correct font size in your PDF documents? You're not alone! This is a common issue faced by developers when working with PDF generation in C# . In this guide, we will walk you through the problem and provide a clear solution to ensure your font displays beautifully in your rendered PDFs.

The Problem

When you create an XFont object using a System.Drawing.Font, you might notice that the text appears disproportionately large. This often leads to confusion regarding the units of measurement being used, as System.Drawing.Font and XFont utilize different unit systems.

Key Points to Understand:

Unit Types: The Font.Size is typically in points, while XFont requires an "em size" for accurate rendering.

Error Messages: You might encounter errors like "Font must use GraphicsUnit.World." This further complicates the conversion since it suggests conflicts with font units.

The issue often arises when dealing with a Font object that has a unit type of "Point," particularly when the font is passed from another assembly.

The Solution

To address this problem effectively, we need to convert the System.Drawing.Font size from points to em-sized units that XFont can utilize. Let's break down the solution into organized steps.

Step 1: Understand the Unit Conversion

1 point is equivalent to approximately 0.352777 millimeters. To get the correct emSize, we leverage this conversion by multiplying the Font.Size by 0.35277777777778.

Step 2: Create the XFont Object

Construct the XFont object using the modified size. Below is an example of how to implement this in your code:

[[See Video to Reveal this Text or Code Snippet]]

Breakdown of the Code:

XStringFormat: This is where we set the alignment for your text to be centered on the page.

Font Conversion: The emSize now correctly translates the point size to the appropriate unit for XFont.

Creating XFont: The XFont is created using the new em size along with the font family and style specified in your original Font object.

Common Errors and How to Avoid Them

"Font must use GraphicsUnit.World": Ensure you're passing the GraphicsUnit.World to the constructor to prevent this error.

Text Size Too Large: Double-check the conversion calculation. Using the wrong multiplier can drastically affect your font size.

Conclusion

By following the steps outlined above, you can smoothly transition from System.Drawing.Font to PdfSharp.Drawing.XFont and ensure that your text sizes are consistent and precise. Properly managing font sizes will enhance the readability and appearance of your PDFs, making your documents look professional and polished.

Now that you have the tools to convert fonts accurately, you can tackle any PDF generation tasks with confidence. Happy coding!