把这一列写成这样
   <asp:TemplateField HeaderText="操作">
                                    <ItemTemplate>
                                       <asp:Label ID="lb1" runat="server" Text='<%#Eval("姓名").ToString()+Eval("学号").ToString()%>'></asp:Label>
                                    </ItemTemplate>
                                    <ItemStyle HorizontalAlign="Center" />
                                </asp:TemplateField>