为什么2次点击后更新面板仍然有效

Question

我建立了一个在某些帖子上需要点赞按钮的网站。

我制作了“喜欢”按钮，但是删除了“喜欢”按钮，一切都很好。

但是，当我创建具有“喜欢”数量的标签时，“喜欢”数量的更新面板在第一次单击时没有刷新，但是在第二次单击中，更新面板做出了我单击第一个按钮时应该做的事情时间。

请需要帮助。

<td align="left">
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
          <ContentTemplate>
              <asp:LinkButton ID="Like" runat="server" class="ll glyphicon glyphicon-thumbs-up" OnClick="Like_Click"></asp:LinkButton>
               <asp:LinkButton ID="dilike" runat="server" class="ll glyphicon glyphicon-thumbs-up" style="color:cornflowerblue" OnClick="dilike_Click"></asp:LinkButton>
          </ContentTemplate>
          <Triggers>
                <asp:AsyncPostBackTrigger ControlID="Like" EventName="Click" />
                <asp:AsyncPostBackTrigger ControlID="dilike" EventName="Click" />
          </Triggers>
     </asp:UpdatePanel>
</td>
<td align="right">
    <asp:UpdatePanel ID="UpdatePanel2" runat="server">
      <ContentTemplate>
           <asp:Label ID="Label7" runat="server" Text="Label"></asp:Label>
      </ContentTemplate>
      <Triggers>
           <asp:AsyncPostBackTrigger ControlID="dilike" EventName="Click" />
           <asp:AsyncPostBackTrigger ControlID="Like" EventName="Click" />
     </Triggers>
    </asp:UpdatePanel>

</td>

    protected void Like_Click(object sender, EventArgs e)
    {
        int id = Convert.ToInt32(Session["login"]);
        int postid = Convert.ToInt32(Request.QueryString["id"]);
        string sql = "insert into likes([for],[by]) values(" + postid + "," + id + ")";
        conDB.ExecuteNonQuery(sql);
        dilike.Visible = true;
        Like.Visible = false;
    }

    protected void dilike_Click(object sender, EventArgs e)
    {
        int id = Convert.ToInt32(Session["login"]);
        int postid = Convert.ToInt32(Request.QueryString["id"]);
        string sql = "delete from likes where for=" + postid + " AND by=" + id + "";
        conDB.ExecuteNonQuery(sql);
        dilike.Visible = false;
        Like.Visible = true;
    }

PageLoad{

//check like
            string sqll = "select by from likes where for="+postid+" AND by="+id+"";
            if (conDB.ExecuteScalar(sqll) == null)
            {
                Like.Visible = true;
                dilike.Visible = false;
            }
            else
            {
                dilike.Visible = true;
                Like.Visible = false;
            }

            //count likes
            string sqll2 = "select count(by) from likes where for=" + postid + "";
            Label7.Text = conDB.ExecuteScalar(sqll2).ToString() + " Likes";

}