动态组合SQL语句方式实现批量更新的实例

                    <asp:BoundField DataField="content" HeaderText="发布内容" />
                    <asp:BoundField DataField="userName" HeaderText="发布人" />
                    <asp:BoundField DataField="lineMan" HeaderText="联系人" />
                    <asp:BoundField DataField="issueDate" HeaderText="发布时间"
                        DataFormatString="{0:d}" />
                </Columns>
                <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
                <RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
                <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
                <PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Right" />
                <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
                <AlternatingRowStyle BackColor="White" />
            </asp:GridView>
        </asp:Panel>
                    <asp:CheckBox ID="cbAll" runat="server" AutoPostBack="True"
            Font-Size="9pt" OnCheckedChanged="cbAll_CheckedChanged"
                        Text="全选/反选" />

        <asp:Button ID="btnUpdateTime" runat="server" onclick="btnUpdateTime_Click"
            Text="更新发布时间" />

    </div>
    </form>
</body>
</html>

Default.aspx.cs

using System;
using System.Data;