We have a report with two "single value" dropdownlist parameters (country and city), there are cascading parameters. you should select country first ,then select a city.
Country parameter type is text ,"Available Value" set to dataset (data source is a relational database) like below ( please note no default value for country); City parameter is the same situation and with default value "Default Value" is "Specify Value" and set to string "<All Cities>".
Country
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Value Label
Country1 Country1
Country2 Country2
Country3 Country3
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City
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Value Label
<All Cities> <All Cities>
City1 City1
City2 City2
City3 City3
Before we implement SQL Server 2008 SP2,when access to the report at first time ,Country display <Select a value> and City is disable,then select a country, the city will default to <All Cities>.but after 2008 SP2 it display "<Select a value>" for City parameter when select a country.
We don't have any source code change except installed SP2 and I'm sure the dataset of available value (city parameter) contains "<All Cities>".
I googled but found nothing .Please help and let me know your suggestion !