Report + WPF + Parameters + Object DataSource

Hello,

 this is my scenario: WPF application with ReportViewer. My report uses a objectDataSource and displays a table with data. The DataMember (method which loads the data) expects 3 parameters: dateFrom, dateTo and a list of strings). I would like to select these parameters with custom input controls and pass them to the report. I don't want to use the built-in parameter selector because it doesn't fulfill my requirements.

So it is possible to pass parameters to the report? If I follow the documentation the DataObjectSource is created multiple times (and the data is loaded multiple times) which I don't understand because I only have one ObjectDataSource in my report!

Any help would be appreciated!