Concatenate fields in datagrid

The following code shows a bound coloumn in a datagrid called "ACTIONSTARTTIME". This displays something like "9" for 9 oclock or "24" for midnight.

<asp:boundcolumn DataField="ACTIONSTARTTIME"
HeaderText="Started"
HeaderStyle-Width ="100"
ReadOnly="true"
Visible="True"/>

I also want to concatenate the minutes held in a field called "ACTIONSTARTTIMEMINS" so that the bound coloumn looks like "9:15".

Can someone tell me how I add the ":" and the field "ACTIONSTARTTIMEMINS".

Thankyou

Use a TemplateColumn instead of a BoundColumn:

VB Code:

<asp:TemplateColumn 
  HeaderText = "Start"
  HeaderStyle-Width ="100">
    <ItemTemplate>
      <%# DataBinder.Eval ( Container.DataItem , "ACTIONSTARTTIME" )  + 
      ":" + 
      DataBinder.Eval ( Container.DataItem , "ACTIONSTARTTIMEMINS" ) %>
    </ItemTemplate>
</asp:TemplateColumn>