Question

我有以下几行JavaScript：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="MedIntakeMain.aspx.cs" Inherits="THNDPL_New.MedIntakeMain" %>

<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">

    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=9" />
    <title>Medical Intake Daily Production Log</title>

</head>

<body id="PageBody" runat="server">
   <script type = "text/javascript">
       /* Stop, Clear and Pause the timer displayed under the pause buttons  */
       var h1 = document.getElementsByTagName('h1')[0],
           start = document.getElementById('start'),
           stop = document.getElementById('stop'),
           clear = document.getElementById('clear'),
           seconds = 0, minutes = 0, hours = 0,
           t;

       function add() {
           seconds++;
           if (seconds >= 60) {
               seconds = 0;
               minutes++;
               if (minutes >= 60) {
                   minutes = 0;
                   hours++;
               }
           }

           document.getElementById('<%=h1.ClientID%>').innerText = (hours ? (hours > 9 ? hours : "0" + hours) : "00") + ":" + (minutes ? (minutes > 9 ? minutes : "0" + minutes) : "00") + ":" + (seconds > 9 ? seconds : "0" + seconds);;
       timer();
   }
   function timer() {
       t = setTimeout(add(), 1000);
   }

   function stp() {
       clearTimeout(t);
   }

   function clr() {
       document.getElementById('<%=h1.ClientID%>').innerText = "00:00:00"; 
             seconds = 0; minutes = 0; hours = 0; 
          }

</script>

<form id="form1" runat="server">
    <asp:toolkitscriptmanager runat="server"></asp:toolkitscriptmanager>
.
.
etc...

当我将其添加到按钮的OnClick事件时，一切都消失了：

ScriptManager.RegisterStartupScript(UpdatePanel4, this.GetType(), "stopscript", "stp();", true);
ScriptManager.RegisterStartupScript(UpdatePanel4, this.GetType(), "clearscript", "clr();", true);
ScriptManager.RegisterStartupScript(UpdatePanel4, this.GetType(), "timerscript", "timer();", true);

UpdatePanel4确实存在，如下所示：

<asp:UpdatePanel ID="UpdatePanel4" runat="server">
   <ContentTemplate>
      <asp:Label ID="h1" runat="server" ForeColor="Black"><time>00:00:00</time></asp:Label>
   </ContentTemplate>
</asp:UpdatePanel>

如果我查看页面的来源，它会显示我的所有控件（文本框，下拉列表，按钮等等），但它们不会呈现。

为什么会发生这种情况的任何想法？

调用javascript会导致我的控件无法呈现

0 个答案: