title: Dynamic add columns in a tablix in reporting service
body: <p>I'm having a big trouble in my work...
  I need to create a report in reporting service on visual studio 2012. The problem is that the report have dynamic columns that depend for example on the number of feedbacks a user have.</p>
  
  <p>I already tried doing it with tablix and matrix using column groups with no success, but i did not tried using a custom code for the report...</p>
  
  <p>Details: i'm building the dataset manually, all the rows must be grouped.</p>
  
  <p>Any ideas how to do it? Anybody know if the custom code for the report can resolve my problem?</p>
  
  <p>PS. sry about my english :P</p>