asp.net或javascript中的计时器代码 [英] code for timer in asp.net or javascript
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问题描述
我需要在重新加载页面后连续工作的计时器代码。
通常在重新加载页面计时器后重启但我不需要重新启动计时器。
在网上考试网页上使用计时器。
在asp.net或javascript
请帮忙。
hurry
I need the code of timer which work continuous after reload the page.
normally after reload the page timer re started but I don't need to restart the timer.
To use the timer in online examination web page.
in asp.net or javascript
please help.
hurry
推荐答案
嗨
作为一个例子..
在页面标题处有如下的javascript。如果你正在使用母版页然后在母版页标题部分
Hi
As an example..
Have a javascript as below at the header of the page. if you are using master page then in the master page header section
<script type="text/javascript" language="javascript">
function displayRemainingTime() {
var totalTime = parseInt(document.getElementById("totalTime").value);
var elapsedTime = parseInt(document.getElementById("elapsedTime").value);
var remainTime = totalTime - elapsedTime;
document.getElementById("timerDisplay").innerHTML = "Time elapsed: " + elapsedTime + " minutes, " + remainTime + " minutes Remains";
elapsedTime = elapsedTime + 1;
document.getElementById("elapsedTime").value = elapsedTime;
//alert(elapsedTime);
}
</script>
在加载事件的主体上调用此函数< body onload = displayRemainingTime（）;
aspx页面将具有此控件..
At the body on load event call this function <body onload="displayRemainingTime();"
The aspx page will have this controls..
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:ScriptManager runat="server"></asp:ScriptManager>
<asp:Label ID="timerDisplay" ClientIDMode="Static" runat="server" Text="Label"></asp:Label>
<input type="text" id="totalTime" clientidmode="Static" runat="server" style="visibility:hidden"/>
<input type="text" id="elapsedTime" clientidmode="Static" runat="server" style="visibility:hidden"/>
<asp:Button ID="Button1" runat="server" Text="Button" />
</asp:Content>
来自page_load事件的aspx页面后面的代码有这个代码..
From your code behind of the aspx page at page_load event have this code..
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
totalTime.Value = "30";// The exam total time in minutes.
elapsedTime.Value = "0";
}
ClientScript.RegisterStartupScript(this.GetType(), "script1", "<script type='text/javascript'>setInterval('displayRemainingTime()',60000);</script>;");
}
工作流程是
1）将总时间分配到隐藏文本框中。
2）javascript读取并计算剩余时间。将已用时间设置为隐藏文本框
3）这两个文本框在回发期间将具有这样的值。因此，javascript可以使用该值
4）在页面加载时，我们正在注入一个间隔脚本，该脚本计划在一分钟内运行。
希望这有帮助
The workflow is
1) Assign the total time into a hidden text box.
2) javascript read it and calculate the remaining time. Set the elapsed time into a hidden text box
3) Both these textboxes will be having the values as such during post back. So the javascript can use that values
4)At page load we are injecting a interval script which is scheduled to run at one minute.
hope this helps
1。 web.config文件
1. web.config file
<configuration>
<appsettings>
<add key="sqlconnstr" value="Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\My\Documents\testexam.mdf;Integrated Security=True;Connect Timeout=30" />
</appsettings>
<system.web>
<compilation debug="true" targetframework="4.5" />
<httpruntime targetframework="4.5" />
</system.web>
</configuration>
2. default.aspx文件
2. default.aspx file
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function displayRemainingTime() {
var totalTime = parseInt(document.getElementById("totalTime").value);
var elapsedTime = parseInt(document.getElementById("elapsedTime").value);
var remainTime = totalTime - elapsedTime;
document.getElementById("timerDisplay").innerHTML = "Remaining Time :" + remainTime;
elapsedTime = elapsedTime + 1;
document.getElementById("elapsedTime").value = elapsedTime;
}
</script>
<script type="text/javascript" src="count.js"></script>
</head>
<body onload="displayRemainingTime();">
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div>
<asp:Label ID="timerDisplay" ClientIDMode="Static" runat="server" Text="Label" Style="visibility: hidden"></asp:Label>
<input type="text" id="totalTime" clientidmode="Static" runat="server" style="visibility: hidden" />
<input type="text" id="elapsedTime" clientidmode="Static" runat="server" style="visibility: hidden" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<fieldset>
<asp:Label ID="Label1" runat="server" Font-Size="Medium" ForeColor="DarkRed" Style="z-index: 100; position: absolute; top: 19px"
Text="Name : " Width="68px"></asp:Label>
<asp:TextBox ID="txtName" runat="server" Style="z-index: 101; left: 146px; position: absolute; top: 18px"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Style="z-index: 102; left: 321px; position: absolute; top: 18px; right: 380px;"
Text="Start Exam" ToolTip="Enter Your Name" OnClick="Button1_Click" />
<asp:TextBox ID="txtScore" runat="server" Style="z-index: 103; left: 681px; position: absolute; top: 276px"
Visible="False" Width="63px">0</asp:TextBox>
<asp:Panel ID="Panel1" runat="server" BackColor="#E0E0E0" BorderColor="#E0E0E0" Height="264px"
Style="z-index: 104; left: 60px; position: absolute; top: 54px" Visible="False"
Width="707px" ForeColor="#0000C0">
<asp:Label ID="lblName" runat="server" Style="z-index: 100; left: 13px; position: absolute; top: 10px"
Text="Name : " ForeColor="#0000C0" Width="387px"></asp:Label>
<asp:Label ID="lblScore" runat="server" ForeColor="Green" Style="z-index: 102; left: 565px; position: absolute; top: 11px"
Text="Score : " Width="136px"></asp:Label>
<asp:Panel ID="Panel3" runat="server" Height="14px" Width="119px" Style="left: 427px; z-index: 106; position: absolute; top: 10px;">
<span id="cd" style="left: 100px;"></span>
</asp:Panel>
<asp:Panel ID="Panel2" runat="server" Height="214px" Style="z-index: 103; left: 8px; position: absolute; top: 41px"
Width="696px">
<asp:Label ID="lblQuestion" runat="server" Style="z-index: 100; left: 3px; position: absolute; top: 7px"
Text="Label" Width="682px"></asp:Label>
<asp:RadioButtonList ID="RblOption" runat="server" Style="z-index: 102; left: 30px; position: absolute; top: 36px"
Width="515px">
</asp:RadioButtonList>
<asp:Button ID="Button2" runat="server" Style="z-index: 106; left: 289px; position: absolute; top: 178px"
Text="Next" ToolTip="Click Here to Take Next Question" OnClick="Button2_Click" />
</asp:Panel>
<asp:Label runat="server" ID="lblFinalScore" Style="z-index: 108; left: 289px; position: absolute; top: 170px"
Visible="False" />
<asp:Label runat="server" ID="lblCompleted" Style="z-index: 110; left: 289px; position: absolute; top: 200px"
Text="Test Completed Successfully" Visible="false" />
</asp:Panel>
</fieldset>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button2" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
</div>
</form>
</body>
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