Public Property Formula As String

Dim instance As UnaryComparisonConditionalFormattingRule
Dim value As String
 
instance.Formula = value
 
value = instance.Formula

public string Formula {get; set;}

protected void Page_Load(object sender, EventArgs e)
{
    if (this.IsPostBack) return;
    FpSpread1.Sheets[0].Cells[0, 0].Value = 3;
    FpSpread1.Sheets[0].Cells[1, 0].Value = 2;
    FpSpread1.Sheets[0].Cells[1, 1].Value = 4;
    FpSpread1.Sheets[0].Cells[0, 1].Value = 1;   
    //Unary comparison CF
    FarPoint.Web.Spread.UnaryComparisonConditionalFormattingRule unary = new FarPoint.Web.Spread.UnaryComparisonConditionalFormattingRule(FarPoint.Web.Spread.UnaryComparisonOperator.EqualTo, "=A1+B1", true);
    unary.Formula = "=A1+B1";
    unary.BackColor = System.Drawing.Color.Red;
    unary.FontStyle = new FarPoint.Web.Spread.SpreadFontStyle(FarPoint.Web.Spread.UnderlineFontStyle.None);
    unary.FontStyle.RegularBoldItalic = FarPoint.Web.Spread.RegularBoldItalicFontStyle.Bold;
    FpSpread1.ActiveSheetView.SetConditionalFormatting(1, 1, unary);      
}

Protected Sub Page_Load(sender As Object, e As EventArgs)
If Me.IsPostBack Then
   Return
End If
FpSpread1.Sheets(0).Cells(0, 0).Value = 3
FpSpread1.Sheets(0).Cells(1, 0).Value = 2
FpSpread1.Sheets(0).Cells(1, 1).Value = 4
FpSpread1.Sheets(0).Cells(0, 1).Value = 1
'Unary comparison CF
Dim unary As New FarPoint.Web.Spread.UnaryComparisonConditionalFormattingRule(FarPoint.Web.Spread.UnaryComparisonOperator.EqualTo, "=A1+B1", True)
unary.Formula = "=A1+B1"
unary.BackColor = System.Drawing.Color.Red
unary.FontStyle = New FarPoint.Web.Spread.SpreadFontStyle(FarPoint.Web.Spread.UnderlineFontStyle.None)
unary.FontStyle.RegularBoldItalic = FarPoint.Web.Spread.RegularBoldItalicFontStyle.Bold
FpSpread1.ActiveSheetView.SetConditionalFormatting(1, 1, unary)
End Sub