如何在JavaScript中比较两个日期时间？ [英] How to compare two datetime in javascript?

问题描述

我尝试从C＃通过JSON解析创建标记。我对javascript中的日期时间比较有一个小问题。

I tried create markers by JSON parse from C #.I have a small problem about datetime compare in javascript.

  var nowDate= new Date();

  var LastTenMin= new Date(nowDate.getFullYear(), nowDate.getMonth(), nowDate.getDate(),nowDate.getHours(),nowDate.getMinutes()- 10);

 var Time1= data2.LastRecordTime;

 var image2;

  var status;


  if (new Date(Time1) < new Date(LastTenMin)) {


  image2 = '/Images/truckOnline.png';


   status = "Truck is online."+"\n"+"Last seen:"+" "+Time1,

   }

 else {


   image2 = '/Images/truckOffline.png';
   status = "Truck is offline"+"\n"+"Last seen:"+" "+Time1,


            }

其他不起作用！ google map上有truckOnline标记。我的错误在哪里？

else is not working ! There are truckOnline markers on google map.Where is my mistake ?

和LastRecordTime格式在SQL中是这样的：04.12.2013 01:03:00

And LastRecordTime format like this in SQL : 04.12.2013 01:03:00

    LastRecordTime=CONVERT(VARCHAR(10), [ReadTimeColumn], 104) + ' ' + CONVERT(VARCHAR(8), [ReadTimeColumn],108)

推荐答案

Mehmet，

看起来像您输入错误：

  var LastTenMin= new Date(nowDate.getFullYear(), nowDate.getMonth(), nowDate.getDate(),nowDate.getHours(),nowDate.getMinutes(),- 10);

应该是（请注意逗号）：

Should be (note the comma):

  var LastTenMin= new Date(nowDate.getFullYear(), nowDate.getMonth(), nowDate.getDate(),nowDate.getHours(),nowDate.getMinutes() - 10);

您还试图从日期对象创建新的日期对象，这是不正确的：

Also you were trying to create a new date object from a date object, this is incorrect:

 new Date(LastTenMin)

这是一个更完整的解决方案：

And here is a more complete solution:

var nowDate= new Date();
var Time1 = new Date("04/12/2013 01:03:00");
var LastTenMin= new Date(nowDate.getFullYear(), nowDate.getMonth(), nowDate.getDate(), nowDate.getHours(), nowDate.getMinutes() - 10);

// Should return true 
console.log(Time1 < LastTenMin);

// Change the year to a point in the future
Time1 = new Date("04/12/2014 01:03:00");

// Shold return false
console.log(Time1 < LastTenMin);

// So your original conditional should look like this:
if (Time1 < LastTenMin) {
    image2 = '/Images/truckOnline.png';
    status = "Truck is online."+"\n"+"Last seen:"+" "+Time1;
} else {
    image2 = '/Images/truckOffline.png';
    status = "Truck is offline"+"\n"+"Last seen:"+" "+Time1;
}

// And a more concise form:
var isOnline = !(Time1 < LastTenMin);
var image2 = isOnline ? '/Images/truckOnline.png' : '/Images/truckOffline.png';
var status = "Truck is " + (isOnline ? "Online" : "Offline") + "." + "\n" + "Last seen:" + " " + Time1

这是解决方案无需评论：

Here is the solution without comments:

var nowDate= new Date();
var Time1 = new Date(data2.LastRecordTime);
var LastTenMin= new Date(nowDate.getFullYear(), nowDate.getMonth(), nowDate.getDate(), nowDate.getHours(), nowDate.getMinutes() - 10);
var isOnline = !(Time1 < LastTenMin);
var image2 = isOnline ? '/Images/truckOnline.png' : '/Images/truckOffline.png';
var status = "Truck is " + (isOnline ? "Online" : "Offline") + "." + "\n" + "Last seen:" + " " + Time1

我的整个解决方案是假定data2.LastRecordTime中包含的字符串的格式为： MM.DD.YYYY HH：MM：SS。

My whole solution is assuming that the string contained in data2.LastRecordTime is in the format: "MM.DD.YYYY HH:MM:SS".

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