datagridview bounded to a dataset

Question

Hello everyone :)

I'm working on a web application and I have a datagridview which is bounded to a dataset. It's working..but i need to put a condition to one of the columns..and i don't know how because the variable type refers to a columns in a table from the database. Please help!

 <Columns>

      <asp:BoundField HeaderText="ASIGURAT" DataField="denumire" ItemStyle-Width="5px"/>

      <asp:BoundField HeaderText="SERIE" DataField="serie"/>
      if type=1

                <asp:BoundField HeaderText="NUMAR" DataField="numar" />
       else if type=2
                <asp:BoundField HeaderText="NUMAR" DataField="numar_asigurat" />
<Columns/>