IXlFormulaParameter Interface
An internal representation of an expression. Used to set the cell formula.
Namespace: DevExpress.Export.Xl
Assembly: DevExpress.Printing.v24.2.Core.dll
Declaration
Related API Members
The following members return IXlFormulaParameter objects:
Remarks
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.
Example
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.
Note
A complete sample project is available at https://github.com/DevExpress-Examples/excel-export-api-examples
// Create the total row using IXlFormulaParameter.
using (IXlRow row = sheet.CreateRow()) {
row.SkipCells(2);
using (IXlCell cell = row.CreateCell()) {
cell.Value = "Total:";
cell.ApplyFormatting(totalRowFormatting);
}
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));
cell.ApplyFormatting(totalRowFormatting);
}
}