Render CDR Images

Introduction

In this tutorial, we will guide you through the process of rendering CDR (CorelDRAW) images using GroupDocs.Viewer for .NET. CDR is a file format primarily associated with CorelDRAW, a vector graphics editor. With GroupDocs.Viewer, you can easily convert CDR files into various formats like HTML, JPG, PNG, and PDF.

Prerequisites

Before you begin, ensure that you have the following prerequisites:

1. GroupDocs.Viewer for .NET: Make sure you have installed GroupDocs.Viewer for .NET. You can download it from here.
2. Document Directory: Prepare a directory where you want to save the rendered images.
3. Basic Knowledge of C#: Familiarity with C# programming language is necessary to understand the code examples.

Import Namespaces

Before diving into the code examples, import the necessary namespaces in your C# file:

using GroupDocs.Viewer.Options;
using System;
using System.IO;

Now, let’s break down each example into multiple steps:

Rendering to HTML

1. Define the output directory where you want to save the rendered HTML files:

string outputDirectory = "Your Document Directory";

2. Specify the file path format for HTML files:

string pageFilePathFormat = Path.Combine(outputDirectory, "cdr_result_{0}.html");

3. Use the Viewer class to render the CDR file to HTML:

using (Viewer viewer = new Viewer(TestFiles.SAMPLE_CDR))
{
    HtmlViewOptions options = HtmlViewOptions.ForEmbeddedResources(pageFilePathFormat);
    
    viewer.View(options);
}

Rendering to JPG

1. Define the file path format for JPG files:

pageFilePathFormat = Path.Combine(outputDirectory, "cdr_result_{0}.jpg");

2. Use the Viewer class to render the CDR file to JPG:

using (Viewer viewer = new Viewer(TestFiles.SAMPLE_CDR))
{
    JpgViewOptions options = new JpgViewOptions(pageFilePathFormat);
    
    viewer.View(options);
}

Rendering to PNG

1. Define the file path format for PNG files:

pageFilePathFormat = Path.Combine(outputDirectory, "cdr_result_{0}.png");

2. Use the Viewer class to render the CDR file to PNG:

using (Viewer viewer = new Viewer(TestFiles.SAMPLE_CDR))
{
    PngViewOptions options = new PngViewOptions(pageFilePathFormat);
    
    viewer.View(options);
}

Rendering to PDF

1. Define the file path format for PDF:

pageFilePathFormat = Path.Combine(outputDirectory, "cdr_result.pdf");

2. Use the Viewer class to render the CDR file to PDF:

using (Viewer viewer = new Viewer(TestFiles.SAMPLE_CDR))
{
    PdfViewOptions options = new PdfViewOptions(pageFilePathFormat);
    
    viewer.View(options);
}

3. Optionally, you can specify rendering options or render specific pages by passing additional parameters to the viewer.View() method.

Conclusion

Rendering CDR images to various formats like HTML, JPG, PNG, and PDF using GroupDocs.Viewer for .NET is a straightforward process. By following the steps outlined in this tutorial, you can efficiently convert CDR files into different formats based on your requirements.

FAQ’s

Is GroupDocs.Viewer for .NET compatible with all versions of CDR files?

GroupDocs.Viewer for .NET supports rendering of CDR files created by different versions of CorelDRAW.

Can I customize the output of rendered files?

Yes, GroupDocs.Viewer for .NET provides various options to customize the output, such as adjusting image quality, setting watermark, etc.

Does GroupDocs.Viewer for .NET require any external dependencies?

No, GroupDocs.Viewer for .NET is a standalone library and does not require any external dependencies for rendering documents.

Is there a trial version available for GroupDocs.Viewer for .NET?

Yes, you can download a free trial version of GroupDocs.Viewer for .NET from here.

Where can I get support for GroupDocs.Viewer for .NET?

You can get support from the GroupDocs.Viewer community forum here.