title: How to display "All Selected" when parameter (Select All) is selected in SSRS?
body: <p>Using SSRS 2008 r2...I have a report with a single-value parameter and three multi-value parameters, Class1, Name2 and Name3. I'm hoping for an explanation to one thing that I'm seeing and information on a second thing.</p>
  
  <p>One, on the image, Class1 and Name2 both have the (Select All) parameter selected but Class1 is displaying the concatenated parameter variable list whereas Name2 is showing Null. Why is that? If anything, how can I get Class1 to be similar to Name2 and show Null?</p>
  
  <p><img src="https://i.stack.imgur.com/qw2Np.jpg" alt="Report Parameters"></p>
  
  <p>But my desired wish is to have Class1, Name2 and Name3 display the text"All Selected" when the parameter (Select All) is chosen. How can this be achieved?
  Thanks.</p>