C# .NET API to Create, Edit & Convert CAD Drawings

Getting Started with Aspose.CAD for .NET

The recommend way to install Aspose.CAD for .NET is using NuGet. Please use the following command for a smooth installation.

NuGet\Install-Package Aspose.CAD -Version 23.1.0 

AutoCAD Drawings Conversion to PDF via .NET

Aspose.CAD for .NET has included a very useful feature for converting AutoCAD DXF as well as DWG drawings to PDF file format without any external dependencies. The library allows developers to customize the CAD conversion process and has provided many optional features that upon setting can override the rendering process according to the application needs. Developers can easily set the canvas size, customize background & drawing colors, set auto layout scaling, tracking of CAD rendering process, substitute the required fonts with the available fonts, export CAD layouts to PDF, add pen options in the export properties and many more.

// The path to the documents directory.
string MyDir = RunExamples.GetDataDir_ConvertingCAD();
string sourceFilePath = MyDir + "conic_pyramid.dxf";
using (Aspose.CAD.Image cadImage = Aspose.CAD.Image.Load(sourceFilePath))
{
    Aspose.CAD.ImageOptions.CadRasterizationOptions rasterizationOptions = new Aspose.CAD.ImageOptions.CadRasterizationOptions();
    rasterizationOptions.PageWidth = 500;
    rasterizationOptions.PageHeight = 500;
   // rasterizationOptions.TypeOfEntities = TypeOfEntities.Entities3D;

    rasterizationOptions.Layouts = new string[] { "Model" };
    PdfOptions pdfOptions = new PdfOptions();
    pdfOptions.VectorRasterizationOptions = rasterizationOptions;
    MyDir = MyDir + "Export3DImagestoPDF_out.pdf";
    cadImage.Save(MyDir, pdfOptions);
}

Export AutoCAD DWG & DXF to Raster Image via C#

Aspose.CAD for .NET has included very useful functionality for exporting AutoCAD DWG & DXF drawings to raster image formats with just a couple of lines of C# code. The library allows conversion to PNG, BMP, TIFF, JP2, PSD, DICOM, WEBP, JPEG and GIF file formats with ease. The library has included some useful features for working with AutoCAD drawing export, such as exporting AutoCAD DXF or DWG layouts, tracking CAD rendering process, CAD Layers conversion to raster image file formats, all CAD layers conversion to separate Images and many more.

// The path to the documents directory.
string MyDir = RunExamples.GetDataDir_ConvertingCAD();
string sourceFilePath = MyDir + "conic_pyramid.dxf";
using (Aspose.CAD.Image image = Aspose.CAD.Image.Load(sourceFilePath))
{
    // Create an instance of CadRasterizationOptions
    Aspose.CAD.ImageOptions.CadRasterizationOptions rasterizationOptions = new Aspose.CAD.ImageOptions.CadRasterizationOptions();
    // Set page width & height
    rasterizationOptions.PageWidth = 1200;
    rasterizationOptions.PageHeight = 1200;

    // Create an instance of PngOptions for the resultant image
    ImageOptionsBase options = new Aspose.CAD.ImageOptions.PngOptions();
    // Set rasterization options
    options.VectorRasterizationOptions = rasterizationOptions;

    MyDir = MyDir + "conic_pyramid_raster_image_out.png";
    // Save resultant image
    image.Save(MyDir, options);                
}

Add Text & Manage CAD Size via C# API

Aspose.CAD for .NET has included complete support for handling text and images inside CAD drawings with ease. The library has included several important features for handling text entities, such as add new text entities, modify existing text, setting up quality options for the text, inserting MTEXT entities to the right of existing ones, and many more. The library also provides complete support for programmatically adjusting CAD drawing size. It has included two important options for handling CAD drawing size. The first one is Automatic size adjustment and the 2nd one is adjust size by using the UnitType enumeration. The developers don’t need to provide the width and height properties for the automatic option. The following example shows how to achieve it.

string MyDir = RunExamples.GetDataDir_ConvertingCAD();
string sourceFilePath = MyDir + "sample.dwg";
// Load a CAD drawing in an instance of Image
using (var image = Aspose.CAD.Image.Load(sourceFilePath))
{
// Create an instance of BmpOptions class
Aspose.CAD.ImageOptions.BmpOptions bmpOptions = new Aspose.CAD.ImageOptions.BmpOptions();
// Create an instance of CadRasterizationOptions and set its various properties
Aspose.CAD.ImageOptions.CadRasterizationOptions cadRasterizationOptions = new Aspose.CAD.ImageOptions.CadRasterizationOptions();
bmpOptions.VectorRasterizationOptions = cadRasterizationOptions;
cadRasterizationOptions.CenterDrawing = true;
// Set the UnitType property
cadRasterizationOptions.UnitType = Aspose.CAD.ImageOptions.UnitType.Centimenter;
// Set the layouts property
cadRasterizationOptions.Layouts = new string[] { "Model" };
// Export layout to BMP format
string outPath = sourceFilePath + ".bmp";
image.Save(outPath, bmpOptions);