<!-- This code goes into the page as a control !-->

<asp:SqlDataSource 
  ID="[enterid]" 
  runat="server" 
  ConnectionString="<%$ ConnectionStrings:[enter database connection name] %>"
  SelectCommand="[enter sql string]"
  UpdateCommand="[enter sql string]">
  <UpdateParameters>
    <asp:Parameter Name="intConv" Type="Int32" />               
  </UpdateParameters>
  <SelectParameters>
    <asp:ControlParameter 
      ControlID="gvPlayerList" 
      Name="idPlayerID" 
      PropertyName="SelectedValue" 
      Type="Decimal" />
  </SelectParameters>
</asp:SqlDataSource>

Data Connection Control in ASP.NET 3.5

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