title: how to group fields in crystal reports using vb.net code?
body: <p>I am using vb.net 2005. i am trying to set report groupings of a crystal report at runtime based on user defined options. MSDN says this:</p>
  
  <pre><code>Dim FieldDef As FieldDefinition
  FieldDef = 
  Report.Database.Tables.Item(0).Fields.Item(comboBox1().Text)
  Report.DataDefinition.Groups.Item(0).ConditionField = FieldDef 
  </code></pre>
  
  <p>but error shows invalid group number</p>
  
  <p>how to solve this?</p>