Your First Aspose.Diagram Application - Hello World

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-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_LoadSaveConvert();
// 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-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_LoadSaveConvert();
// Call the diagram constructor to load a VSD stream
FileStream st = new FileStream(dataDir + "Drawing1.vsdx", FileMode.Open);
Diagram vsdDiagram = new Diagram(st);
st.Close();
// Call the diagram constructor to load a VDX diagram
Diagram vdxDiagram = new Diagram(dataDir + "Drawing1.vdx");
/*
* Call diagram constructor to load a VSS stencil
* 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);