模板列选中几行删几行，在按钮的点击事件里怎么写？快速结帖

我这样写的不行
<asp:DataList id="list1"  Runat="server" Width="100%">
<ItemTemplate>
<tr>
<td width="10%"><asp:CheckBox ID="chkSelect" runat="server" /></td>
</tr>
</ItemTemplate>
</asp:DataList>
 <asp:ImageButton ID="ImageButton1"  src="images/shanchu.bmp" runat="server" Style="position: relative" OnClick="ImageButton1_Click" />cs:
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        int[] ID = new int[list1.Items.Count];
        int i = 0;        foreach (DataListItem dl in list1.Items)
        {
            CheckBox chk = (CheckBox)dl.FindControl("chkSelect");
            if (chk.Checked)
            {
                ID[i] = Convert.ToInt32(list1.DataKeys[dl.ItemIndex].ToString());
                try
                {
                    conn = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["ConnStr"]);
                    conn.Open();
                    cmd = new SqlCommand("delete from zhanquxinxi where zh_id=ID[i]", conn);
                    cmd.ExecuteNonQuery();
   
                }
                catch (Exception exp)
                {
                    Response.Write(exp.Message);
                }
            }
        }
        BindData1();
    }报错：ID[i] = Convert.ToInt32(list1.DataKeys[dl.ItemIndex].ToString());
索引超出范围。必须为非负值并小于集合大小。
参数名: index怎么改呢？？？