title: SSRS. How to hide blank/empty column via expression?
body: <p>I need to hide column if all rows in column is empty (blank).</p>
  
  <p>In this case <code>col3</code> should be hidden, because no values in column.</p>
  
  <pre><code>col1 col2 col3
   v1   v4
   v2
   v3   
  </code></pre>
  
  <p>I'm using following expression on columns <code>Hidden</code> property: </p>
  
  <p><code>=IIF(Fields!Test5.Value = "",TRUE,FALSE)</code></p>
  
  <p>This expression working, but It hidding each blank(empty) field, even all column isn't empty. It should hide column only when there is no values at all. </p>