Aspose.Slides for .NET 26.4 Release Notes

public enum WorkbookType
{
    /// <summary>
    /// The workbook type is not defined.
    /// </summary>
    NotDefined = -1,

    /// <summary>
    /// Excel workbook (*.xlsx).
    /// </summary>
    Workbook,

    /// <summary>
    /// Excel macro-enabled workbook (*.xlsm).
    /// </summary>
    WorkbookMacro,

    /// <summary>
    /// Excel template (*.xltx).
    /// </summary>
    Template,

    /// <summary>
    /// Excel macro-enabled template (*.xltm).
    /// </summary>
    TemplateMacro,

    /// <summary>
    /// Excel binary macro-enabled workbook (*.xlsb).
    /// </summary>
    WorkbookBinaryMacro
}

/// <summary>
/// Gets the type of the embedded workbook.
/// Returns <see cref="WorkbookType.NotDefined"/> if <see cref="DataSourceType"/> is 
/// <see cref="ChartDataSourceType.ExternalWorkbook"/>.
/// Read-only <see cref="WorkbookType"/>.
/// </summary>
WorkbookType EmbeddedWorkbookType { get; }

using (var presentation = new Presentation("charts.pptx"))
{
    foreach (var shape in presentation.Slides[0].Shapes)
    {
        if (!(shape is IChart chart))
            continue;

        var chartData = chart.ChartData;

        // Skip charts whose embedded workbook format is not supported.
        if (chartData.DataSourceType == ChartDataSourceType.InternalWorkbook &&
            chartData.EmbeddedWorkbookType == WorkbookType.WorkbookBinaryMacro)
        {
            continue;
        }

        // Read or modify chart workbook data.
        Console.WriteLine(chartData.Series[0].Name.AsCells.GetHashCode());

        var cell = chartData.Series[0].DataPoints[0].Value.AsCell;
        Console.WriteLine(cell.Value);
    }

    presentation.Save("charts-out.pptx", SaveFormat.Pptx);
}