获得一份报告，为用户提供一个分组依据参数，其中包含两个可能的值 - 客户和国家/地区。如果用户选择“客户”，则报告会按“客户”分组，否则会按“国家/地区”分组（如果这是用户选择）。
我想创建两个参数“客户”和“国家/地区”来过滤报告。
我想以一种仅当分组依据为客户时才显示客户参数的方式构建报告，类似地，仅当分组依据为国家/地区时才显示国家/地区 - 提示。
这两个参数不应同时显示，否则会让用户感到困惑。提前致谢
Got a report that gives the user a Group by parameter with two possible values - Customer and Country. If user selects Customers then the report groups on Customers else on Country if that is the user selection.
I want to create two parameters Customer and Country for filtering reports.
I want to structure the report in a way that Customer parameter shows up only when Group by is Customers, similarly for Country - prompt only when group by is country.
Both the parameters should not show up at the same time as that will confuse the user. Thanks in advance
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我认为您不能在 Crystal 中拥有可选的可用参数，除非这是 XI 中的新功能。
另一种方法是（除了按参数分组之外）创建具有相对通用名称的第二个参数 - 类似于“组选择值” - 并通过第二个参数选择客户值，其中“客户”是选定的分组选项，否则通过第二个参数选择国家/地区值。
I don't think you can have optionally available parameters in Crystal, unless this is a new feature in XI onwards.
An alternative approach would be (in addition to your group by parameter) to create a second parameter with a relatively generic name - something like "group selection values" - and select customer values by this second parameter where Customers is the selected grouping option, otherwise select country values by this second parameter.