title: RDLC report - hiding columns if data is empty
body: <p>I have a rdlc report, working on Visual Studio 2010. I want to hide columns that have no data, by using the expression</p>
  
  <pre><code>=IIF(IsNothing(Fields!column_header.Value), True, False)
  </code></pre>
  
  <p>(<strong>column_header</strong> is the column's header I want to hide). OK, empty columns are not displayed... But another problem has appeared: the columns in which the first field is empty, not shown. This is strange, and I see nothing wrong with the above expression.</p>
  
  <p>Any help?</p>