How do I dynamically set the MultiValue property for 1 parameter based on another?

I am trying to set the property of 1 parameter based on the results of another parameter.

For example:

Parameters: PA and PB

If the user selects All or multiple values for PA

Then PB should not be MultiValue

Otherwise PB should be MultiValue

Does anyone have any suggestions?

Thanks

You could make PB MulitValue always, but have it's dataset filtered based on the PA parameter values. You just have to make sure PA comes first in your parameters list.

Hope that helps.