<asp:GridView ID="Griglia" runat="server" DataKeyNames="ID" AutoGenerateColumns="false" OnRowDeleting="Griglia_RowDeleting" OnRowEditing="Griglia_RowEditing" OnRowCancelingEdit="Invia_Click">
    <Columns>
          <asp:BoundField DataField="Data_Creazione" DataFormatString ="{0:d}" HeaderText="Data Creazione" ReadOnly="True" SortExpression="Data_Creazione"/>
          <asp:BoundField DataField="Data_Inizio" DataFormatString ="{0:d}" HeaderText="Data Inizio" SortExpression="Data_Inizio"/>
          <asp:BoundField DataField="Data_Fine" DataFormatString ="{0:d}" HeaderText="Data Fine" SortExpression="Data_Fine"/>
          <asp:BoundField DataField="Note" HeaderText="Note" SortExpression="Note"/>
          <asp:BoundField DataField="Stato" HeaderText="Stato" ReadOnly="True" SortExpression="Stato"/>
          <asp:BoundField DataField="Data_Stato" DataFormatString ="{0:d}" HeaderText="Data Stato" ReadOnly="True" SortExpression="Data_Stato"/>
          <asp:BoundField DataField="Matricola_Approvante" HeaderText="Matricola Approvante" ReadOnly="True" SortExpression="Matricola_Approvante"/>
          <asp:BoundField DataField="Approvante" HeaderText="Approvante" ReadOnly="True" SortExpression="Approvante"/>
          <asp:TemplateField  ShowHeader="False">
              <ItemTemplate>
                  <asp:ImageButton ID="Modifica" runat="server" CausesValidation="False" CommandName="Edit" ImageUrl="~/img/modifica.gif"/>
                  <asp:ImageButton ID="Invia" runat="server" CausesValidation="False" CommandName="Cancel" ImageUrl="~/img/invia.jpg" style="width:19px"/>
                  <asp:ImageButton ID="Cancella" runat="server" CausesValidation="False" CommandName="Delete" ImageUrl="~/img/elimina.gif"
                            OnClientClick="javascript:return confirm('Sei sicuro di voler eliminare la richesta selezionata?');" EnableTheming="True"/>                          
              </ItemTemplate>
              <ItemStyle Width="60px" />
          </asp:TemplateField>
          <asp:BoundField DataField="ID"  HeaderText="ID" ReadOnly="True" SortExpression="ID" Visible="False"/>
    </Columns>
    </asp:GridView>