Report Builder 3.0 filter expression not working

Question

I have a dataset in ReportBuilder 3.0 that is filtering rows from a table on a DistrictNumber field of type integer. The value to be filtered is coming from a prompted parameter. The filter is [DistrictNumber] = [@OutcomeDistrictNumber] and this is working
correctly. The dataset has a field called AssessmentPeriod of type string. Values in this field take the form SFY13 or SFY14. Notice that the last two characters are the year.
Next I have a column chart that is getting data from this dataset to display scores in different categories. There is a filter on the chart to get only the data for one assessment period. The value to be filtered is coming from a prompted parameter. The
filter is [AssessmentPeriod] = [@CurrentAssessmentPeriod] and again this is working.
Here is the problem. I have another column chart that should display the scores in different categories for the previous assessment period. So I thought it is possible to derive the value to be compared from the same parameter used in the other chart. I
clicked the fx button next to the Value textbox on the Change filters dialog box and typed the following:
         = "SFY" & Str(Int(Val(Mid(Parameters!CurrentAssessmentPeriod.Value, 4, 2)) - 1))
I typed [AssessmentPeriod] in the Expression field and selected = for the Operator. My thinking is that if the parameter was SFY14 then the expression will give SFY13. But this is not returning any data. The database table has some rows whose AssessmentPeriod
is SFY13.
Any help will be greatly appreciated.

Answer 1

Hi tropicalsage,
According to your description, you have a column chart which filter data based on a parameter. Now you want to have another column chart filter data based on the same parameter selection with the last two characters minus 1(SPY14->SPY13). Right?
In Reporting Services, we can have two charts filter data based on one parameter. In this scenario, we just need to cut out the last two characters of the parameter selection, do the calculation, concatenate into string and put this string into filter. Please
try the following expression in your filter:
="SPY"&CStr(CInt(Right(Parameters!CurrentAssessmentPeriod.Value,2))-1)
We have tested this scenario with sample data in our local environment. The result looks like below:
If you have any question, please feel free to ask.
Best Regards,
Simon Hou