<asp:TemplateField HeaderText="Notizia" SortExpression="notizia">
                                <EditItemTemplate>
                                    <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("notizia") %>'></asp:TextBox>
                                </EditItemTemplate>
                                <ItemTemplate>
                                    <asp:Label ID="Label1" runat="server" 
                                        Text='<%# Eval("notizia").substring(0,50) & "..." %>'></asp:Label>
                                </ItemTemplate>
                                <HeaderStyle HorizontalAlign="Left" />
                                <ItemStyle HorizontalAlign="Left" />
</asp:TemplateField>