Repeater控件中套checkbox 插入checkbox 选中行的数据 每次只能插入第一条记录 【急】！！！

   <asp:Repeater ID="Repeater1" runat="server">

      <ItemTemplate>    



           <div class="order">订购请勾选

         <asp:CheckBox ID="CheckBox1" runat="server" CssClass='<%#Eval("序号") %>' />

          &nbsp;&nbsp;&nbsp;&nbsp;数量&nbsp;&nbsp;

         <asp:TextBox runat="server" id="text3" class="numbers" ></asp:TextBox>

           </div>

          </div>

  

      </ItemTemplate>

   </asp:Repeater>

                for (int i = 0; i < Repeater1.Items.Count; i++)

                {

                

                    int num = Convert.ToInt32(((TextBox)Repeater1.Items[i].FindControl("text3")).Text);

                    CheckBox cb = (CheckBox)Repeater1.Items[i].FindControl("CheckBox1");

                    if (cb.Checked)

                    {

                        strsql = "insert into tmwsc_uesr_dd (产品序号,数量)values('"+ cb.CssClass +"','"+ num + "')";

                        bool zz = Das.ExecSql(strsql);

 



                    }

                }

每次添加 都是 只插入第一条记录  求解答 
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