''' <summary>
''' Add chart to a PDF document.
''' </summary>
''' <param name="filePath">The PDF file path.</param>
''' <param name="chartRectInPoint">The chart rect on PDF page in points (1/72 inch).</param>
Public Shared Sub AddChartToPdfFile(filePath As String, chartRectInPoint As System.Drawing.RectangleF)
    ' path to a template DOCX document with chart
    Dim templateDocDocumentPath As String = "ChartTemplate.docx"

    ' open PDF document
    Using pdfDocument As New Vintasoft.Imaging.Pdf.PdfDocument(filePath, False)
        ' get PDF document page
        Dim pdfPage As Vintasoft.Imaging.Pdf.Tree.PdfPage = pdfDocument.Pages(0)

        ' create Office document figure
        Using officeDocumentFigure As New Vintasoft.Imaging.Pdf.Drawing.GraphicsFigures.OfficeDocumentFigure()
            ' update figure properties

            officeDocumentFigure.SetDocumentFilename(templateDocDocumentPath)
            officeDocumentFigure.Location = chartRectInPoint.Location
            officeDocumentFigure.Size = chartRectInPoint.Size
            officeDocumentFigure.UseGraphicObjectRelativeSize = True


            ' fill the document template with real data
            FillDocumentTemplate(officeDocumentFigure)

            ' create PDF graphics
            Using pdfGraphics As Vintasoft.Imaging.Pdf.Drawing.PdfGraphics = pdfPage.GetGraphics()
                ' draw chart on PDF page
                officeDocumentFigure.DrawFigure(pdfGraphics)
            End Using

            ' save changes in PDF document
            pdfDocument.SaveChanges()
        End Using
    End Using
End Sub

''' <summary>
''' Fills the template DOCX document with real data.
''' </summary>
''' <param name="figure">The document figure.</param>
Private Shared Sub FillDocumentTemplate(figure As Vintasoft.Imaging.Pdf.Drawing.GraphicsFigures.OfficeDocumentFigure)
    ' create DOCX document editor
    Using editor As New Vintasoft.Imaging.Office.OpenXml.Editor.Docx.DocxDocumentEditor(figure.DocumentStream)
        ' get DOCX document body
        Dim documentBody As Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlDocumentElement = editor.Body

        ' change TITLE

        ' find title
        Dim titleText As Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextContent = documentBody.FindText("[TITLE]")
        ' change the title text
        titleText.Text = "Sales"
        ' highlight the title in bold
        titleText.SetTextProperties(Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties.BoldText)


        ' change DATE

        ' find date
        Dim dateText As Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextContent = documentBody.FindText("[DATE]")
        ' change the date text
        dateText.Text = System.DateTime.Now.ToString("yyyy")

        ' create the date text properties
        Dim dateTextProperties As New Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties()
        ' change the date text color
        dateTextProperties.Color = System.Drawing.Color.Blue
        ' change the date text size
        dateTextProperties.FontSize = 24

        ' change the date text properties
        dateText.SetTextProperties(dateTextProperties)


        ' change CHART

        ' create the chart data
        Dim chartData As System.Nullable(Of Double)(,) = New System.Nullable(Of Double)(,) {{55, 32, 23}, {84, 48, 33}, {72, 53, 86}, {34, 82, 11}}
        ' change the chart data
        editor.Charts(0).ChartData.SetData(chartData)


        ' create stream for changed document (disposed after use)
        Dim changedDocumentStream As New System.IO.MemoryStream()
        ' save template changes
        editor.Save(changedDocumentStream)
        ' change document stream
        figure.SetDocumentStream(changedDocumentStream, True)
    End Using
End Sub

/// <summary>
/// Add chart to a PDF document.
/// </summary>
/// <param name="filePath">The PDF file path.</param>
/// <param name="chartRectInPoint">The chart rect on PDF page in points (1/72 inch).</param>
public static void AddChartToPdfFile(string filePath, System.Drawing.RectangleF chartRectInPoint)
{
    // path to a template DOCX document with chart
    string templateDocDocumentPath = "ChartTemplate.docx";

    // open PDF document
    using (Vintasoft.Imaging.Pdf.PdfDocument pdfDocument = new Vintasoft.Imaging.Pdf.PdfDocument(filePath, false))
    {
        // get PDF document page
        Vintasoft.Imaging.Pdf.Tree.PdfPage pdfPage = pdfDocument.Pages[0];

        // create Office document figure
        using (Vintasoft.Imaging.Pdf.Drawing.GraphicsFigures.OfficeDocumentFigure officeDocumentFigure = new Vintasoft.Imaging.Pdf.Drawing.GraphicsFigures.OfficeDocumentFigure())
        {
            // update figure properties

            officeDocumentFigure.SetDocumentFilename(templateDocDocumentPath);
            officeDocumentFigure.Location = chartRectInPoint.Location;
            officeDocumentFigure.Size = chartRectInPoint.Size;
            officeDocumentFigure.UseGraphicObjectRelativeSize = true;


            // fill the document template with real data
            FillDocumentTemplate(officeDocumentFigure);

            // create PDF graphics
            using (Vintasoft.Imaging.Pdf.Drawing.PdfGraphics pdfGraphics = pdfPage.GetGraphics())
            {
                // draw chart on PDF page
                officeDocumentFigure.DrawFigure(pdfGraphics);
            }

            // save changes in PDF document
            pdfDocument.SaveChanges();
        }
    }
}

/// <summary>
/// Fills the template DOCX document with real data.
/// </summary>
/// <param name="figure">The document figure.</param>
private static void FillDocumentTemplate(Vintasoft.Imaging.Pdf.Drawing.GraphicsFigures.OfficeDocumentFigure figure)
{
    // create DOCX document editor
    using (Vintasoft.Imaging.Office.OpenXml.Editor.Docx.DocxDocumentEditor editor =
        new Vintasoft.Imaging.Office.OpenXml.Editor.Docx.DocxDocumentEditor(figure.DocumentStream))
    {
        // get DOCX document body
        Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlDocumentElement documentBody = editor.Body;

        // change TITLE

        // find title
        Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextContent titleText = documentBody.FindText("[TITLE]");
        // change the title text
        titleText.Text = "Sales";
        // highlight the title in bold
        titleText.SetTextProperties(Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties.BoldText);


        // change DATE

        // find date
        Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextContent dateText = documentBody.FindText("[DATE]");
        // change the date text
        dateText.Text = System.DateTime.Now.ToString("yyyy");

        // create the date text properties
        Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties dateTextProperties =
            new Vintasoft.Imaging.Office.OpenXml.Editor.OpenXmlTextProperties();
        // change the date text color
        dateTextProperties.Color = System.Drawing.Color.Blue;
        // change the date text size
        dateTextProperties.FontSize = 24;

        // change the date text properties
        dateText.SetTextProperties(dateTextProperties);


        // change CHART

        // create the chart data
        double?[,] chartData = new double?[,] {
             { 55, 32, 23 },
             { 84, 48, 33 },
             { 72, 53, 86 },
             { 34, 82, 11 } };
        // change the chart data
        editor.Charts[0].ChartData.SetData(chartData);


        // create stream for changed document (disposed after use)
        System.IO.MemoryStream changedDocumentStream = new System.IO.MemoryStream();
        // save template changes
        editor.Save(changedDocumentStream);
        // change document stream
        figure.SetDocumentStream(changedDocumentStream, true);
    }
}