Get Warning Information while Saving Visio File

Possible Usage Scenarios

Sometimes the user tries to save the diagram which contains text that does not have a local font. In such case, Aspose.Diagram throws warnings while saving the diagram. You can catch these warnings by implementing the IWarningCallback interface and setting SaveOptions.WarningCallback property.

Get Warnings while Saving Visio File

The following sample code explains how to get warnings while saving visio file. The code convert the sample visio file which throws FontSubstitution warning on saving. This warning is then caught by IWarningCallback.Warning() method that prints the warning messages on the console. Please also check the console output of the code given below for more understanding.

Sample Code

// 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_Intro();

// call the diagram constructor to load diagram from a VSDX file
Diagram diagram = new Diagram(dataDir + "sampleFontSubstitution.vsdx");

// create an instance SVG save options class
Aspose.Diagram.Saving.SVGSaveOptions so = new Aspose.Diagram.Saving.SVGSaveOptions();

so.WarningCallback = new TestDiagramWarningCallback();
// save Visio drawing
diagram.Save(dataDir + "WarningCallback_out.svg", options);


public class TestDiagramWarningCallback : Aspose.Diagram.IWarningCallback
{
    public void Warning(Aspose.Diagram.WarningInfo info)
    {
        if (info.WarningType == Aspose.Diagram.WarningType.FontSubstitution)
        {
            Console.WriteLine("Diagram WARNING INFO: " + info.Description);
        }

    }
}

Console Output

Here is the console output of the above code when executed with the provided sample visio file.

Font substitution: Font [ Athene Logos ] has been substituted by Font[Times New Roman]