<asp:TemplateField HeaderText="办卡地点"> <ItemTemplate> <asp:Label ID="lbl_address" runat="server" Text='<%# Eval("办卡地点").ToString().Length > 20 ? Eval("办卡地点").ToString().Substring(0, 20) +"...": Eval("办卡地点").ToString() %>'>'></asp:Label> </ItemTemplate> </asp:TemplateField>