将Razor变量传递给JavaScript函数

问题描述 投票:1回答:3

我正在Asp.net MVC的一个拍卖网站上工作,我正在努力展示每个项目的拍卖会剩余多少时间的计时器。我使用我的模型将项目列表传递到我的cshtml页面,然后像这样迭代它们:

我的javascript函数启动计时器:

function countdown(time) {
    // Get todays date and time
    var now = new Date().getTime();

    // Find the distance between now an the count down date
    var distance = time - now;

    // Time calculations for days, hours, minutes and seconds
    var days = Math.floor(distance / (1000 * 60 * 60 * 24));
    var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
    var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
    var seconds = Math.floor((distance % (1000 * 60)) / 1000);

    // Display the result in the element with id="timeLeft"
    document.getElementById("timeLeft").innerHTML = days + "d " + hours + "h "
        + minutes + "m " + seconds + "s ";

}, 1000);

然后是我的模型的迭代器,用项目的结束日期调用js函数

@foreach (var item in Model)
    {
        //code here
        countdown(@item.EndDate)
        <text id="timeLeft"></text>
    }

我的脚本由<script src="~/Scripts/countdown.js" />引用

我遇到的问题是如何用c#razor变量调用这个js函数。做一件基本的东西,如:

<body onload= "countdown('@item.EndDate')">

当我把我的剃刀变量时,它会使我的功能变灰。我如何将变量传递给我的js函数? EX :(带有奇异的模型项目) enter image description here enter image description here

javascript c# jquery asp.net-mvc
3个回答
2
投票

试试这个语法:

@foreach (var item in Model)
{
    //code here
    countdown(`${@item.EndDate}`)
}

1
投票

如果你想在javascript中制作一个计时器,我会使用window.setInterval函数,然后将第二个参数设置为时间间隔。

这个函数countdown需要传递三个参数

  1. 结束一年
  2. 结束月份
  3. 结束日

    function countdown(endYear,endMonth,endDay) {
    	 window.setInterval(function () { StartCount(endYear, endMonth, endDay, 'andy timer'); }, 1000);
    }

    function StartCount(endYear,endMonth,endDay){
    	var now=new Date();
    	var endDate=new Date(endYear,endMonth-1,endDay);

    	var leftTime=endDate.getTime() - now.getTime();

    	var leftSecond=parseInt(leftTime/1000);

    	var day=Math.floor(leftSecond/(60*60*24));

    	var hour=Math.floor((leftSecond-day*24*60*60)/3600);

    	var minute=Math.floor((leftSecond - day * 24 * 60 * 60 - hour * 3600) / 60);

    	var second = Math.floor(leftSecond - day * 24 * 60 * 60 - hour * 3600 - minute * 60);
    	
          document.getElementById("timeLeft").innerHTML = day + "d " + hour + "h "
        + minute + "m " + second + "s ";
    }

    countdown(2018,10,5)
<div id='timeLeft'></div>

您可以在body标签上使用它

<body onload= "countdown(@Model.EndDate.Year,@Model.EndDate.Month,@Model.EndDate.Day)">

编辑

它在c#MVC在线工作:https://dotnetfiddle.net/ERcwAb


0
投票

我想出了一个疯狂的方式来做我想要做的事情,可能效率不高,可能对整个编码社区来说是一种罪恶,但这里是:

@foreach (var item in Model)
{
    <script>
    function countdown(endYear, endMonth, endDay, endHours, endMin, num) {
        window.setInterval(function () { StartCount(endYear, endMonth, endDay, endHours, endMin, num); }, 1000);
    }

    function StartCount(endYear, endMonth, endDay, endHours, endMin, num) {
        var now = new Date();
        var endDate = new Date(endYear, endMonth - 1, endDay, endHours, endMin);

        var leftTime = endDate.getTime() - now.getTime();

        var leftSecond = parseInt(leftTime / 1000);

        var day = Math.floor(leftSecond / (60 * 60 * 24));

        var hour = Math.floor((leftSecond - day * 24 * 60 * 60) / 3600);

        var minute = Math.floor((leftSecond - day * 24 * 60 * 60 - hour * 3600) / 60);

        var second = Math.floor(leftSecond - day * 24 * 60 * 60 - hour * 3600 - minute * 60);

        var id = "timeLeft" + num;

        document.getElementById(id).innerHTML = day + "d " + hour + "h "
      + minute + "m " + second + "s ";
    }
    countdown(@item.EndDate.Year, @item.EndDate.Month, @item.EndDate.Day,@item.EndDate.Hour, @item.EndDate.Minute, @num)
    </script>

    @{string countNum = "timeLeft" + num;}
     <text id= @countNum></text>
     @{num++;}
     //code
}

但是它仍会异步加载项目将加载的所有内容,然后时钟都会在一秒钟之后出现,所有内容都会相应地移动。可能是由于我最初的问题是无法调用body onload。

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