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IXlFormulaParameter Interface

An internal representation of an expression. Used to set the cell formula.

Namespace: DevExpress.Export.Xl

Assembly: DevExpress.Printing.v24.1.Core.dll

NuGet Package: DevExpress.Printing.Core


public interface IXlFormulaParameter

The following members return IXlFormulaParameter objects:

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The IXlFormulaParameter objects are created from values using the XlFunc.Param method. Subsequently, you can use the XlOper and XlFunc class methods to construct an expression that is also the IXlFormulaParameter object.

To obtain a textual expression, call the IXlFormulaParameter.ToString method.


This code snippet creates an IXlFormulaParameter expression from a combination of constants, operators and functions. Constants are transformed into the IXlFormulaParameter objects with the XlFunc.Param method. Operators are static methods of the XlOper object and functions are static methods of the XlFunc object.

When an expression is created, the IXlCell.SetFormula method is used to enter expression into a worksheet cell as the cell formula.


A complete sample project is available at

// Create the total row using IXlFormulaParameter.
using (IXlRow row = sheet.CreateRow()) {
    using (IXlCell cell = row.CreateCell()) {
        cell.Value = "Total:";
    using (IXlCell cell = row.CreateCell()) {
        // Set the formula to calculate the total amount plus 10 handling fee.
        // =SUM($D$2:$D$5)+10
        IXlFormulaParameter const10 = XlFunc.Param(10);
        IXlFormulaParameter sumAmountFunction = XlFunc.Sum(XlCellRange.FromLTRB(cell.ColumnIndex, 1, cell.ColumnIndex, row.RowIndex - 1).AsAbsolute());
        cell.SetFormula(XlOper.Add(sumAmountFunction, const10));
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