Returning a Range of Values using AbstractCalculationEngine

Aspose.Cells provides AbstractCalculationEngine class which is used to implement user-defined or custom functions that are not supported by Microsoft Excel as built-in functions.

This article will explain how to return the range of values from AbstractCalculationEngine.

The following code demonstrates the use of the AbstractCalculationEngine class and returns the range of values via its method.

Create a class with a function CalculateCustomFunction. This class implements AbstractCalculationEngine.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
public class CustomFunctionStaticValue : AbstractCalculationEngine
{
    public override void Calculate(CalculationData data)
    {
        data.CalculatedValue = new object[][] {
            new object[]{new DateTime(2015, 6, 12, 10, 6, 30), 2},
            new object[]{3.0, "Test"}
            };
    }
}

Now use above function into your program

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

// Create workbook
Workbook workbook = new Workbook();
Cells cells = workbook.Worksheets[0].Cells;

// Set formula
Cell cell = cells[0, 0];
cell.SetArrayFormula("=MYFUNC()", 2, 2);

Style style = cell.GetStyle();
style.Number = 14;
cell.SetStyle(style);

// Set calculation options for formula
CalculationOptions calculationOptions = new CalculationOptions();
calculationOptions.CustomEngine = new CustomFunctionStaticValue();
workbook.CalculateFormula(calculationOptions);

// Save to xlsx by setting the calc mode to manual
workbook.Settings.FormulaSettings.CalculationMode = CalcModeType.Manual;
workbook.Save(dataDir + "output_out.xlsx");

// Save to pdf
workbook.Save(dataDir + "output_out.pdf");