服务器和客户端之间的日期时间差异

发布于 2024-11-04 21:47:37 字数 1824 浏览 4 评论 0原文

每个人！我正在解决 ASP.NET MVC 项目中的下一个时间问题：

问题：需要计算客户端 DateTime 和服务器 DateTime 之间的差异。 我有 javascript 函数，它使用 timeStamp 参数 = getNow() 对服务器（DateController）进行 Ajax 查询，其代码如下。

   getNow: function() {
        var date = new Date();
        return (date.getTime() + (date.getTimezoneOffset() * 60000));
    }

接下来，在服务器端我有 DateController，其中我需要计算以毫秒为单位的日期时间差：

     ....
     var clientMs = long.Parse(Request.QueryString["t"]);
     var dt1970 = new DateTime(1970, 1, 1, 0, 0, 0);
     var msFrom1970 = (DateTime.Now - dt1970).TotalMilliseconds
            +(DateTime.UtcNow - DateTime.Now).TotalMilliseconds;
     var timeOffset = msFrom1970 -clientMs; 

     return new JsonResult
        {
            JsonRequestBehavior = JsonRequestBehavior.AllowGet,
            Data = new { responseText = timeOffset.ToString() 
        };
     }

但是 timeOffset 计算错误。我尝试在小型控制台应用程序中检查此逻辑：

 class Program
{
    static void Main(string[] args)
    {
         var clientMs =  1304411645875; 
        //value  of clientMs I get from javaScript by using page
        //http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_gettime
        //with this script
         /*
         <HTML>
         <body>
           <script type="text/javascript">
           var d=new Date();
            document.write(d.getTime());
           </script>
          </body>
         </HTML>
         */



        var dt1970 = new DateTime(1970, 1, 1, 0, 0, 0);
        var msFrom1970 = (DateTime.Now - dt1970).TotalMilliseconds
            +(DateTime.UtcNow - DateTime.Now).TotalMilliseconds;
        Console.WriteLine( msFrom1970);
        Console.ReadLine();
    }
}

差异约为几个小时。有人可以告诉我我的错误或问题是由其他原因引起的吗？

原文

everyone!
I'm solving next problem with time in my ASP.NET MVC project:

Problem: need to calculate difference between client DateTime and server DateTime.
I have javascript function, that do Ajax query to server (DateController) with timeStamp parameter = getNow(), code of which is below.

   getNow: function() {
        var date = new Date();
        return (date.getTime() + (date.getTimezoneOffset() * 60000));
    }

Next, on server side I have DateController, in which I need to calculate dateTime difference in milliseconds:

     ....
     var clientMs = long.Parse(Request.QueryString["t"]);
     var dt1970 = new DateTime(1970, 1, 1, 0, 0, 0);
     var msFrom1970 = (DateTime.Now - dt1970).TotalMilliseconds
            +(DateTime.UtcNow - DateTime.Now).TotalMilliseconds;
     var timeOffset = msFrom1970 -clientMs; 

     return new JsonResult
        {
            JsonRequestBehavior = JsonRequestBehavior.AllowGet,
            Data = new { responseText = timeOffset.ToString() 
        };
     }

But timeOffset is calculated wrong. I try to check this logic in small console app:

 class Program
{
    static void Main(string[] args)
    {
         var clientMs =  1304411645875; 
        //value  of clientMs I get from javaScript by using page
        //http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_gettime
        //with this script
         /*
         <HTML>
         <body>
           <script type="text/javascript">
           var d=new Date();
            document.write(d.getTime());
           </script>
          </body>
         </HTML>
         */



        var dt1970 = new DateTime(1970, 1, 1, 0, 0, 0);
        var msFrom1970 = (DateTime.Now - dt1970).TotalMilliseconds
            +(DateTime.UtcNow - DateTime.Now).TotalMilliseconds;
        Console.WriteLine( msFrom1970);
        Console.ReadLine();
    }
}

Difference is about hours.
Can someone show me my mistake or problem is occurred by something else?

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永不分离 2024-11-11 21:47:38

您似乎在努力将 javascript 日期转换为 C# 日期。

[更新] getUTCMilliseconds() 只返回日期的毫秒部分 [/更新]
~~要将日期（以毫秒为单位）传递给服务器，请使用以下函数：~~

~~getNow: function() { var date = new Date(); return date.getUTCMilliseconds(); }~~

并将 UTC 毫秒值转换为 .NET 中的日期时间：

// Convert UTC milliseconds to System.DateTime
DateTime dtClient = new DateTime((millisecondsClient * TimeSpan.TicksPerMillisecond) + 621355968000000000);

// Test if this conversion is correct:
TimeSpan offset = DateTime.UtcNow - dtClient;

您似乎缺少的是从毫秒到刻度的转换。

参考资料：
http://www.w3schools.com/jsref/jsref_getUTCMilliseconds.asp
http://twit88.com/blog/2011/01/ 23/net-datetime-from-milliseconds/

You seem to be struggling with converting a javascript date to a C# date.

[Update] getUTCMilliseconds() only returns the milliseconds part of a date [/Update]
~~To pass the date in milliseconds to the server, use this function:~~

~~getNow: function() { var date = new Date(); return date.getUTCMilliseconds(); }~~

And to convert this value of UTC milliseconds to a DateTime in .NET:

// Convert UTC milliseconds to System.DateTime
DateTime dtClient = new DateTime((millisecondsClient * TimeSpan.TicksPerMillisecond) + 621355968000000000);

// Test if this conversion is correct:
TimeSpan offset = DateTime.UtcNow - dtClient;

What you seem to be missing is the conversion from milliseconds to ticks.

References:
http://www.w3schools.com/jsref/jsref_getUTCMilliseconds.asp
http://twit88.com/blog/2011/01/23/net-datetime-from-milliseconds/

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