corelibraries-devexpress-dot-export-dot-xl-2821da92.md
An internal representation of an expression. Used to set the cell formula.
Namespace : DevExpress.Export.Xl
Assembly : DevExpress.Printing.v25.2.Core.dll
NuGet Package : DevExpress.Printing.Core
public interface IXlFormulaParameter
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.
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$5)+10
IXlFormulaParameter const10 = XlFunc.Param(10);
IXlFormulaParameter sumAmountFunction = XlFunc.Sum(XlCellRange.FromLTRB(cell.ColumnIndex, 1, cell.ColumnIndex, row.RowIndex - 1).AsAbsolute());
cell.SetFormula(XlOper.Add(sumAmountFunction, const10));
cell.ApplyFormatting(totalRowFormatting);
}
}
' Create the total row using IXlFormulaParameter.
Using row As IXlRow = sheet.CreateRow()
row.SkipCells(2)
Using cell As IXlCell = row.CreateCell()
cell.Value = "Total:"
cell.ApplyFormatting(totalRowFormatting)
End Using
Using cell As IXlCell = row.CreateCell()
' Set the formula to calculate the total amount plus 10 handling fee.
' =SUM($D$2:$D$5)+10
Dim const10 As IXlFormulaParameter = XlFunc.Param(10)
Dim sumAmountFunction As IXlFormulaParameter = XlFunc.Sum(XlCellRange.FromLTRB(cell.ColumnIndex, 1, cell.ColumnIndex, row.RowIndex - 1).AsAbsolute())
cell.SetFormula(XlOper.Add(sumAmountFunction, const10))
cell.ApplyFormatting(totalRowFormatting)
End Using
End Using
See Also