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<title>Combination Chart using ASP.NET and C# - Returns Open XML (XLSX) Workbook Using SpreadsheetGear</title>
<meta content="Combination Chart with ASP.NET, C# and SpreadsheetGear, a royalty free Microsoft Excel compatible spreadsheet component for the Microsoft .NET Framework featuring the fastest and most complete calculation engine available. Create, read, modify, calculate and write Microsoft Excel workbooks from your Microsoft .NET, ASP.NET, C#, VB.NET and Microsoft Office solutions. Integrates with Microsoft Visual Studio .NET, including IntelliSense and Dynamic Help." name="description" />
<script language="C#" runat="server">
    void Page_Load(Object sender, EventArgs e)
        // Create a new workbook.
        SpreadsheetGear.IWorkbook workbook = SpreadsheetGear.Factory.GetWorkbook();
        SpreadsheetGear.IWorksheet worksheet = workbook.Worksheets["Sheet1"];
        SpreadsheetGear.IWorksheetWindowInfo windowInfo = worksheet.WindowInfo;
        SpreadsheetGear.IRange cells = worksheet.Cells;

        // Load some sample data.
        cells["G3:G7"].Value =
            new string[,] { { "Mon" }, { "Tue" }, { "Wed" }, { "Thu" }, { "Fri" } };
        cells["H2:K2"].Value =
            new string[,] { { "Breakfast", "Lunch", "Dinner", "Total" } };
        cells["H3:J7"].Formula = "=INT(RAND() * 500) + 300";
        cells["K3:K7"].Formula = "=SUM(H3:J3)";

        // Add a chart to the worksheet's shape collection.
        // NOTE: Calculate the coordinates of the chart by converting row and column
        //       coordinates to points.  Use fractional row and colum values to get 
        //       coordinates anywhere in between row and column boundaries.
        double left = 10;
        double top = windowInfo.RowToPoints(0.25);
        double right = windowInfo.ColumnToPoints(6.0) - 10;
        double bottom = windowInfo.RowToPoints(13.75);
        SpreadsheetGear.Charts.IChart chart =
            worksheet.Shapes.AddChart(left, top, right - left, bottom - top).Chart;

        // Set the chart's source data range, plotting series in columns.
        SpreadsheetGear.IRange source = cells["G2:K7"];
        chart.SetSourceData(source, SpreadsheetGear.Charts.RowCol.Columns);

        // Set the chart type.
        chart.ChartType = SpreadsheetGear.Charts.ChartType.ColumnStacked100;

        // Get a reference to the chart's series collection and each series.
        SpreadsheetGear.Charts.ISeriesCollection seriesCollection = chart.SeriesCollection;
        SpreadsheetGear.Charts.ISeries seriesBreakfast = seriesCollection[0];
        SpreadsheetGear.Charts.ISeries seriesLunch = seriesCollection[1];
        SpreadsheetGear.Charts.ISeries seriesDinner = seriesCollection[2];
        SpreadsheetGear.Charts.ISeries seriesTotal = seriesCollection[3];

        // Change the last series chart type and plot it on the secondary axis. 
        // NOTE: This creates a combination chart using multiple chart groups
        //       and utilizes both primary and secondary axes sets, allowing for
        //       disproportionate ranges of values to be plotted separately.
        seriesTotal.ChartType = SpreadsheetGear.Charts.ChartType.Line;
        seriesTotal.AxisGroup = SpreadsheetGear.Charts.AxisGroup.Secondary;

        // Change the fill color of each primary series.
        seriesBreakfast.Format.Fill.ForeColor.RGB = SpreadsheetGear.Colors.DarkOrange;
        seriesLunch.Format.Fill.ForeColor.RGB = SpreadsheetGear.Colors.OrangeRed;
        seriesDinner.Format.Fill.ForeColor.RGB = SpreadsheetGear.Colors.Red;

        // Change the line color of the total series.
        seriesTotal.Format.Line.ForeColor.RGB = SpreadsheetGear.Colors.Yellow;

        // Add data labels to the total series and get a reference to the data labels.
        seriesTotal.HasDataLabels = true;
        SpreadsheetGear.Charts.IDataLabels dataLabels = seriesTotal.DataLabels;

        // Position each data label below each data point.
        dataLabels.Position = SpreadsheetGear.Charts.DataLabelPosition.Below;

        // Change the fill formatting of the data labels.
        SpreadsheetGear.Shapes.IFillFormat fillFormat = dataLabels.Format.Fill;
        fillFormat.ForeColor.RGB = SpreadsheetGear.SystemColors.Window;
        fillFormat.Visible = true;

        // Change the line formatting of the data labels.
        SpreadsheetGear.Shapes.ILineFormat lineFormat = dataLabels.Format.Line;
        lineFormat.ForeColor.RGB = SpreadsheetGear.SystemColors.WindowText;
        lineFormat.Visible = true;

        // Change the legend position to the top of the chart.
        chart.Legend.Position = SpreadsheetGear.Charts.LegendPosition.Top;

        // Get a reference to the primary value axis, hide major
        // gridlines, and use a fixed major unit scaling value.
        SpreadsheetGear.Charts.IAxis valueAxis =
        valueAxis.HasMajorGridlines = false;
        valueAxis.MajorUnit = 0.25;

        // Change the chart font name and size.
        chart.ChartArea.Font.Name = "Verdana";
        chart.ChartArea.Font.Size = 8;

        // Add a chart title and change the font size.
        chart.HasTitle = true;
        chart.ChartTitle.Text = "Weekday Calorie Intake";
        chart.ChartTitle.Font.Size = 9;
        // Stream the Excel workbook to the client in the Open XML file
        // format compatible with Excel 2007-2019 and Excel for Office 365.
        Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        Response.AddHeader("Content-Disposition", "attachment; filename=report.xlsx");
        workbook.SaveToStream(Response.OutputStream, SpreadsheetGear.FileFormat.OpenXMLWorkbook);