将Razor变量传递给JavaScript函数

时间:2018-07-05 19:49:51

标签: javascript c# jquery asp.net-mvc

我正在Asp.net MVC中的一个拍卖站点上工作,我试图显示每个项目的拍卖还剩多少时间的计时器。我将模型的项目列表传递到我的cshtml页面,然后像这样遍历它们:

我的用于启动计时器的JavaScript函数:

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);

然后我的模型迭代器,使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>
    }

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

引用
  

我遇到的问题是如何使用c#剃刀变量调用此js函数。对一项进行基本操作,例如:

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

当我输入剃须刀变量时,它会变灰。   我该如何将变量传递到js函数中?
   EX :(带有单个模型项)
  enter image description here   enter image description here

3 个答案:

答案 0 :(得分:2)

尝试使用以下语法:

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

答案 1 :(得分:1)

如果要使用javascript作为计时器,我将使用window.setInterval函数,然后将第二个参数设置为时间间隔。

此功能countdown需要传递三个参数

  1. 结束年份
  2. 月末
  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

它可以在在线c#MVC上运行:https://dotnetfiddle.net/ERcwAb

答案 2 :(得分:0)

我想出了一种疯狂的方式来做我想做的事情,可能效率不高,可能对整个编码社区都是一种罪过,但这是:

@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
}

但是它仍然是异步加载的,所有项目都将在这里加载,然后时钟都在第二秒出现,所有内容都相应地移动。可能是由于我最初的问题,即无法调用body onload。