You can review Using Report Parameters in Expressions
and How to: Add filtering to Report
help articles for the information how to filter a report based on the parameters passed by the end-user.
To use report parameters to filter data, please check Filtering data
and Using Parameters with the SqlDataSource component
To update the parameters' values, you can make parameters visible and use the viewer's parameters area. If you prefer to use custom UI, parameters' values can be updated through the viewer's ReportSource.Parameters
collection. The ReportSource.Parameters
collection is mapped by key to the report's ReportParameters collection.
If the above information does not help, please open a support ticket and attach an isolated sample demonstrating the current settings of your report and test data.
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