title: Concatenate string field in crystal reports
body: <p>I have below data in my detail section.</p>
  
  <pre><code>Contract No 
  VTC/2013/0026
  VTC/2013/0028
  VTC/2013/0030
  </code></pre>
  
  <p>These data are belong to a one field in a table and there can be more.<br></p>
  
  <p>I want to display the same details in the report header like below.</p>
  
  <pre><code>VTC/2013/0026, VTC/2013/0028, VTC/2013/0030, ...
  </code></pre>
  
  <p>How can I do that without using a sub-report?</p>