<script runat="server">
     Sub Popola_datagrid(Src As Object, E As EventArgs)
            Cal_int_datagrid.Datasource = dsInterventi.DefaultView
      Cal_int_datagrid.Databind()
   End Sub
  </script>

<asp:DataGrid 
  AllowCustomPaging="true" 
  AllowPaging="true" 
  AllowSorting="False" 
  AutoGenerateColumns="false" 
  CellPadding="3" 
  CellSpacing="0"
  id="Cal_int_datagrid" 
  OnPreRender="Popola_datagrid"  
  PagerStyle-Mode="NumericPages" 
  PageSize="<%# dsInterventi.PageSize %>" 
  runat="server" 
  ShowFooter="false" 
  ShowHeader="true" 
  OnPageIndexChanged="dsInterventi.OnDataGridPageIndexChanged" 
  VirtualItemCount="<%# dsInterventi.RecordCount %>" 
  Width="100%">