Change value of SSRS report parameter based on the input of another parameter
<p>I have a SSRS 2005 report with three parameters: @FromDate, @ToDate and @Period. @FromDate and @ToDate default to the first day and the last day of last month, respectively.</p>

<p>The @Period parameter is a multi-value parameter. So if I choose for instance "Current quarter", I want the @FromDate and @ToDate to change to the corresponding values based on the input in @Period.</p>

<p>My problem is <em>not</em> getting the correct datetime expressions, but rather how to make the parameters interact with each other as desired.</p>