aspose.cells单元格的货币符显示，颜色及赤字显示

网上问不到，然后自己摸索出来了。

style.Custom = "[$$] #,##0.00_);([$$] #,##0.00)"

这可以显示美元符，并且负值用（）括住，不显示负号

然后用一个条件格式把负值时红色显示

            Dim conditionIndex As Integer = fcs.AddCondition(FormatConditionType.CellValue, OperatorType.Between, "-1000000", "-0.01")
            'Dim fc As FormatCondition = fcs.get(idx)
            Dim fc As FormatCondition = fcs(conditionIndex)
            'fc.setFormula1("0")
            'fc.setOperator(OperatorType.LessThan)

            'Sets the background color.
            fc.Style.Custom = cstyle.Custom
            fc.Style.Font.Color = Color.Red