Export DGN as Part of DWG in Aspose.CAD for .NET

Introduction

In the world of .NET development, Aspose.CAD stands out as a powerful library for working with Computer-Aided Design (CAD) files. This tutorial will guide you through the process of exporting a DGN (Design) file as part of a DWG (Drawing) file using Aspose.CAD for .NET. Whether you’re a seasoned developer or just starting, this step-by-step guide will help you harness the capabilities of Aspose.CAD to achieve this specific task efficiently.

Prerequisites

Before diving into the tutorial, make sure you have the following prerequisites in place:

• Aspose.CAD for .NET: Ensure that you have the Aspose.CAD library for .NET installed. You can download it here.

• Development Environment: Set up your preferred .NET development environment, such as Visual Studio.

• Basic Knowledge of C#: Familiarize yourself with the C# programming language.

Import Namespaces

In your C# project, include the necessary namespaces to access the Aspose.CAD functionality. Add the following using directives at the beginning of your code file:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Aspose.CAD;

Now, let’s break down the provided code into multiple steps:

Step 1: Define File Paths

// Input and Output file paths
string fileName = "BlockRefDgn.dwg";
string outPath = fileName + ".pdf";

Step 2: Create PdfOptions Instance

// Create an instance of PdfOptions class for exporting DWG to PDF
PdfOptions exportOptions = new PdfOptions();

Step 3: Load DWG File

// Load the existing DWG file as an image and convert it to CadImage type
using (CadImage cadImage = (CadImage)Image.Load(fileName))

Step 4: Iterate Through Entities

// Iterate through each entity inside the DWG file
foreach (CadBaseEntity baseEntity in cadImage.Entities)

Step 5: Check Entity Type

// Check if the entity is an image definition
if (baseEntity.TypeName == CadEntityTypeName.DGNUNDERLAY)

Step 6: Get Underlay Path

// If it's an image definition, get the external reference to the object
CadDgnUnderlay dgnFile = (CadDgnUnderlay)baseEntity;
Console.WriteLine(dgnFile.UnderlayPath);

Step 7: Define Rasterization Options

// Define settings for CadRasterizationOptions object
exportOptions.VectorRasterizationOptions = new CadRasterizationOptions()
{
    PageWidth = 1600,
    PageHeight = 1600,
    Layouts = new string[] { "Model" },
    AutomaticLayoutsScaling = false,
    NoScaling = true,
    BackgroundColor = Color.Black,
    DrawType = CadDrawTypeMode.UseObjectColor
};

Step 8: Export DWG to PDF

// Export the DWG to PDF by calling Save method
cadImage.Save(outPath, exportOptions);

Conclusion

Congratulations! You’ve successfully walked through the process of exporting a DGN file as part of a DWG file using Aspose.CAD for .NET. This tutorial has provided you with the fundamental steps and code snippets to achieve this specific task seamlessly.

FAQ’s

Q1: Can I use Aspose.CAD for .NET in my commercial projects?

A1: Yes, you can. Visit here to explore licensing options.

Q2: Are there any limitations on the size of DWG files I can process?

A2: Aspose.CAD supports handling large DWG files, but hardware limitations may apply.

Q3: Is there a trial version available?

A3: Yes, you can get a free trial here.

Q4: How can I get temporary licenses?

A4: Temporary licenses can be obtained here.

Q5: Where can I seek assistance if I encounter issues?

A5: You can visit the Aspose.CAD forum here for support.