如何在asp.net web应用程序（C#）中制作倒计时器？

发布于 2024-10-02 05:15:06 字数 1045 浏览 0 评论 0原文

我正在 C# asp.net 中创建定时在线测试。我是使用本地机器时间创建的。但在数据库断开连接或系统挂起的情况下，倒计时器必须从机器挂起或数据库意外断开的时间开始。例如，用户正在回答问题 10 分钟，系统意外挂起。恢复后，倒计时必须从 10 分钟开始。谁能帮我用 C# 编码吗？

我使用了以下代码，但它在上述场景中没有用。

int totalTime = (Convert.ToInt32(ViewState["totaltime"])) * 60;

DateTime startTime = (DateTime)ViewState["startTime"];
TimeSpan elaspedTime = DateTime.Now.Subtract(startTime);
Literal1.Text = elaspedTime.Hours.ToString() + "h" + ":" + elaspedTime.Minutes.ToString() + 
    "m" + ":" + elaspedTime.Seconds.ToString() + "s";

int finish = Convert.ToInt32(elaspedTime.TotalSeconds);

int remaingsec = (totalTime - finish);
TimeSpan remainingtime = TimeSpan.FromSeconds(remaingsec);
string answer = string.Format("{0:D2}h:{1:D2}m:{2:D2}s",
                    remainingtime.Hours,
                    remainingtime.Minutes,
                    remainingtime.Seconds,
                    remainingtime.Milliseconds);

LIteral2.Text =  answer;
if (totalTime == finish)
{
     lnkFinish_Click(sender, e);
     Response.Redirect(@"~/Error.aspx");
}

原文

I am creating timed online test in C# asp.net. I have created it using the local machine time. But in the case of Database disconnection or system hang, The countdown timer must start from the time at which the machine has hanged or unexpected database disconnectivity. For example the user is answering the Questions for 10 mins and unexpectedly system hanged. After recovery the countdown must start from 10 mins. Can anyone please help me with coding in C#?

I have used the following code, But its not useful in the above scenario.

int totalTime = (Convert.ToInt32(ViewState["totaltime"])) * 60;

DateTime startTime = (DateTime)ViewState["startTime"];
TimeSpan elaspedTime = DateTime.Now.Subtract(startTime);
Literal1.Text = elaspedTime.Hours.ToString() + "h" + ":" + elaspedTime.Minutes.ToString() + 
    "m" + ":" + elaspedTime.Seconds.ToString() + "s";

int finish = Convert.ToInt32(elaspedTime.TotalSeconds);

int remaingsec = (totalTime - finish);
TimeSpan remainingtime = TimeSpan.FromSeconds(remaingsec);
string answer = string.Format("{0:D2}h:{1:D2}m:{2:D2}s",
                    remainingtime.Hours,
                    remainingtime.Minutes,
                    remainingtime.Seconds,
                    remainingtime.Milliseconds);

LIteral2.Text =  answer;
if (totalTime == finish)
{
     lnkFinish_Click(sender, e);
     Response.Redirect(@"~/Error.aspx");
}

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梦途 2024-10-09 05:15:06

我的意见是使用 javascript 进行倒计时（也嵌入）并使用 json 传递数据库数据，当数据库导致断开连接时，您将一些数据传递给 javascript 并使用控制进行倒计时。

下载以下 javascript 文件并将其放入您的 Web 应用程序目录中：
http://scripts.hashemian.com/js/countdown.js

而不是使用一些东西像这样：

<script type="text/javascript">
        TargetDate = "12/25/207 12:01 AM";
        BackColor = "red";
        ForeColor = "white";
        CountActive = true;
        CountStepper = -1;
        LeadingZero = true;
        DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";
        FinishMessage = "It is here!";
    </script>

My opinion is to use javascript for the countdown (embedded as well) and to pass your DB data with json, when DB cause disconnection you pass some data to javascript and with a control you proced to the countdown.

Download the following javascript file and put into your web application directory:
http://scripts.hashemian.com/js/countdown.js

And than use something like this:

<script type="text/javascript">
        TargetDate = "12/25/207 12:01 AM";
        BackColor = "red";
        ForeColor = "white";
        CountActive = true;
        CountStepper = -1;
        LeadingZero = true;
        DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";
        FinishMessage = "It is here!";
    </script>

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