ASP.NET 后台怎样获取repeater控件中选中行（checkbox选择）的数据！在线等！

前台
<ItemTemplate>
            <div class="LvItems">
                <div class="Row_Title"><a class="Link329" href="News_Edit.aspx?id=<%#Eval("ID")%>"><%# Eval("CN_Title")%></a></div>
                <div class="Row_Title2"><a class="Link329" href="News_Edit.aspx?id=<%#Eval("ID")%>"><%# Eval("EN_Title")%></a></div>
                <div class="Row_PostTime"><%# Eval("PostTime").ToString()%></div>
                <div class="Row_Ctrl2">
                    <asp:CheckBox ID="ChkSelect" runat="server" />
                    <asp:Label ID="CheckBoxID" runat="server" Text='<%#Eval("ID")%>' Visible="false"></asp:Label>
                </div>
            </div>
        </ItemTemplate>后台        protected void DeleteNews_Click(object sender, EventArgs e)
        {
            string DeleteStr = "";
            for (int i = 0; i < NewsList.Items.Count; i++)
            {
                CheckBox chk = (CheckBox)NewsList.Items[i].FindControl("ChkSelect");
                if (chk != null && chk.Checked == true)
                {
                    Label CKID = (Label)NewsList.Items[i].FindControl("CheckBoxID");
                    DeleteStr = DeleteStr + CKID.Text + ",";
                }
            }
            if (DeleteStr.Length < 1)
            {
                BLL.Msg.Msgbox("请选择要删除的项！");
                return;
            }
            DeleteStr = DeleteStr.Substring(0, DeleteStr.Length - 1);//去掉最后一个,
            int Dels = BLL.News.DeleteNews(DeleteStr);
            if (Dels > 0)
            {
                if (Convert.ToInt32(BLL.Pages.getCount(TableName, whereStr)) / this.AspNetPager1.PageSize < this.AspNetPager1.CurrentPageIndex)
                {
                    this.AspNetPager1.CurrentPageIndex = this.AspNetPager1.CurrentPageIndex - 1;
                }
                BindListView();
            }
            else
            {
                BLL.Msg.Msgbox("删除失败!");
            }
        }