Your First Aspose.Diagram Application - Hello World

This tutorial shows how to create a very first application (Hello World) using Aspose.Diagram' simple API. This simple application creates a Microsoft Visio file with the text ‘Hello World’ in a specified Page.

Creating the Hello World Application

The steps below creates the Hello World application using the Aspose.Diagram API:

1. Create an instance of the Diagram class.
2. If you have a license, then apply it. If you are using the evaluation version, skip the license related code lines.
3. Create a new Visio file, or open an existing Visio file.
4. Create a new text box.
5. Insert the words Hello World! into a text box.
6. Generate the modified Microsoft Visio file.

The implementation of the above steps is demonstrated in the examples below.

Code Sample: Creating a New Diagram

The following example creates a new diagram from the scratch, writes Hello World! on the first page and saves the Visio file.

// For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-Java
// The path to the documents directory.
String dataDir = Utils.getDataDir(CreateNewVisio.class);
// initialize a Diagram class
Diagram diagram = new Diagram();

// save diagram in the VSDX format
diagram.save(dataDir + "CreateNewVisio_Out.vsdx", SaveFileFormat.VSDX);

Code Sample: Opening an Existing File

The following example opens an existing Microsoft Visio template file named “Sample.vsdx”, inputs “Hello World!” text in the first page and saves the diagram.

// For complete examples and data files, please go to https://github.com/aspose-diagram/Aspose.Diagram-for-Java
// The path to the documents directory.
String dataDir = Utils.getDataDir(ReadVisioDiagram.class);   
// Open the stream. Read only access is enough for Aspose.Diagram to load a diagram.
InputStream stream = new FileInputStream(dataDir + "Drawing1.vsdx");

//Call the diagram constructor to load diagram from a VSDX stream
Diagram vsdDiagram = new Diagram(stream);
stream.close();

//Call the diagram constructor to load diagram from a VDX file
Diagram vdxDiagram = new Diagram(dataDir + "Drawing1.vdx");

/*
 * Call diagram constructor to load diagram from a VSS file
 * providing load file format
*/
Diagram vssDiagram = new Diagram(dataDir + "Basic.vss", LoadFileFormat.VSS);

/*
 * Call diagram constructor to load diagram from a VSX file
 * providing load options
*/
LoadOptions loadOptions = new LoadOptions(LoadFileFormat.VSX);
Diagram vsxDiagram = new Diagram(dataDir + "Drawing1.vsx", loadOptions);