Reporting services SSRS IIF和开关功能

我有一个报告，其中我想根据列值更改列（sales）的背景色。下面是大陆列的值。

我在Sales栏（背景色）下尝试了以下表达式

预览报告时，我只能看到所有行的绿色。我知道SSRS中的Switch函数将返回它找到的第一个表达式。

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我也试过只使用IIF条件，还是一样的问题。有没有办法做到这一点？

您是否尝试过以下方法

=IIF((Fields!column.Value ="4th Quarter") AND (Fields!continents.Value ="Asia"),"Green",
     IIF((Fields!column.Value ="4th Quarter") AND (Fields!continents.Value = "N America"),"LIMEGREEN",
        IIF((Fields!column.Value ="4th Quarter") AND (Fields!continents.Value ="S America"),"Yellow",
            IIF((Fields!column.Value ="4th Quarter") AND (Fields!continents.Value = "Europe"), "Red",
            "Dummy Value"))))

=IIF((Fields!column.Value ="4th Quarter") AND (Fields!continents.Value ="Asia"),"Green",
     IIF((Fields!column.Value ="4th Quarter") AND (Fields!continents.Value = "N America"),"LIMEGREEN",
        IIF((Fields!column.Value ="4th Quarter") AND (Fields!continents.Value ="S America"),"Yellow",
            IIF((Fields!column.Value ="4th Quarter") AND (Fields!continents.Value = "Europe"), "Red",
            "Dummy Value"))))