How to check if a value is selected in a multi-value parameter

Question

In SSRS 2008, I use Multi-value parameters to, well, select multiple values for a particular parameter.

In my report I have conditional formatting: a particular label ha

Answer 1

I think the cleanest way is probably the following

Array.IndexOf(Parameters!p_myMultipleValueParameter.Value, Fields!groepType.Value) > -1

Running a join each time may be inefficient because of the overhead of allocating extra strings, especially if the function will be run over a large list, or once per row of a grid, say.