从文件读取JSON日期

Question

I write my logs to a text file as JSON. In the file the call obejct LogTime value is

"1378289277591".
*{"LogTime":"Date(1378290565240)"}*

Consider the code below:

Public Class Sync{
  public async Task<CallModel> ConvertCallFileToCallObejct(string path)
        {
            try
            {
                using (var sr = new StreamReader(path))
                {
                    string callText = await sr.ReadToEndAsync();
                    var call = new JavaScriptSerializer().Deserialize<CallModel>(callText);

                    return call;
                }
            }
            catch (Exception exception)
            {
                Console.WriteLine(exception.Message);
            }
        }
}

I convert the Call File to Call Object:

var sync = new Sync();
CallModel call = sync.ConvertCallFileToCallObejct(e.FullPath).GetAwaiter().GetResult();

The problem is that Call.LogTime is 9/4/2013 10:29:25 AM but Using Chrome Console and new Date(1378290565240) the result is 9/4/2013 14:59:25 PM

What is the problem?

Answer 1

try below code

// JSON received from server is in string format
var jsonString = '{"date":1251877601000}';

//use JSON2 or some JS library to parse the string
var jsonObject =  JSON.parse( jsonString );

//now you have your date!
alert( new Date(jsonObject.date) );

Answer 2

我不确定您的时区是什么，但是我希望它的UTC日期是。

Answer 3

According to your profile, you live in Iran, where the timezone is UTC+3:30. However, in April, Iran uses daylight saving time so the real timezone is UTC+4:30.

This means that UTC time of 9/4/2013 10:29:25 AM is 9/4/2013 14:59:25 PM local time in Iran.

According to ECMA specification , the time given in your JSON string is treated as UTC time, and it is deserialized as such. You can check the return value of Call.LogTime expression which returns DateTimeKind.Utc . Thus, what you see in your C# code is UTC time.

Now, Chrome also sees this time as UTC time, however it seems to display it as local time, according to your timezone. I am not 100% sure, but I think that Chrome uses your list of preferred languages when choosing how to display date, so try to play with it - I have no idea what exactly it does, but I remember a similar problem when changing the language order affected how time was interpreted. OF course, it depends on what exactly you try to achieve - IMO, both values are correct, as it is the same time.