title: set value of variable and use it in same SSRS expression
body: <p>In SQL server reporting services(SSRS) tablix cell, i want to write an expression as follows:-</p>
  
  <p>set the value of variable and use that variable in "if" condition.
  i have written following expression and its working fine, only issue is i want only "if" condition to be evaluate.
  currently output is : "TrueVariable text is NA"</p>
  
  <blockquote>
  <pre><code>=Variables!myVar.SetValue("NA")
  &amp;IIf(Variables!myVar.Value="NA","Variable text is NA","Variable text is not NA")
  </code></pre>
  </blockquote>