.NET Visio Diagram API to Create, Edit, Export, and Process Diagrams

Aspose.Diagram for .NET Installation

To install Aspose.Diagram for .NET API, you can download the DLLs or the MSI installer from the downloads section. Or, you can use the NuGet package to set up the Visio diagram API for .NET. The command for the package manager console is given below:

PM > Install-Package Aspose.Diagram 

How to Create Visio Diagrams From Scratch and Convert Visio to PDF in .NET

Create Visio Diagrams from Scratch in .NET

Aspose.Diagram for .NET API is a complete diagram manipulation solution enabling developers to create Visio diagrams loaded with all essential elements such as shapes, flowcharts, comments, and much more. You can use the .NET diagram API to create Visio documents from scratch with the help of the below-given steps and information:

• Check if the directory to save the file exists.
• Create a directory if it doesn’t exist.
• Initialize an object of the Diagram class.
• Save the diagram as VSDX using Diagram.Save(String fileName, SaveFileFormat.VSDX) method.

// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_Diagrams();
// Create a directory if it is not already present.
bool IsExists = System.IO.Directory.Exists(dataDir);
if (!IsExists)
    System.IO.Directory.CreateDirectory(dataDir);
// Initialize a new Visio
Diagram diagram = new Diagram();
dataDir = dataDir + "CreateDiagram_out.vsdx";
// Save in the VSDX format
diagram.Save(dataDir, SaveFileFormat.VSDX);

Convert MS Visio Diagrams to PDF in .NET

Converting files to PDF format makes sharing and accessing them easier across multiple devices. Aspose.Diagram for .NET API allows converting Visio diagrams to PDF format within your C# .NET apps. You can programmatically convert VSD or VSDX to PDF with high conversion quality. The following steps and information will help you in achieving this:

• Initialize the Diagram class object to load the input Visio file to convert.
• Instantiate the PdfSaveOptions class object.
• Set file properties like page count and page index.
• Save the output file as PDF.

// Load Visio diagram
Aspose.Diagram.Diagram diagram = new Aspose.Diagram.Diagram("Sample.vsd");
 
// Declare PdfSaveOptions object
Aspose.Diagram.Saving.PdfSaveOptions saveOptions = new Aspose.Diagram.Saving.PdfSaveOptions();
 
// Number of pages to render
saveOptions.PageCount = 2;
 
// Set first page index
saveOptions.PageIndex = 1;
 
// Save Visio diagram to PDF
diagram.Save("PDF_out.pdf", saveOptions);
 
Console.WriteLine("Done");

Independently manipulate and print Visio files