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>Thanks a lot, Paul. I meant a little bit different thing, e.g. I selected a record in a GridView and then I open a form (depending on the person type) to edit the record. The @PersonType parameter for Update should become the selected value from the grid.
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>But I got the idea, so that's what I try.
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Could you use the a ControlParamter and set it's PropertyName to "SelectedValue" and it's ControlID to the name of your grid?