Parse custom date format using JSON.Net

Question

I'm receiving a JSON date in the following format:

"launch_date": 1250553600

How should I modify the following to include a custom DateTime parser that allows me to convert that number into a DateTime object?

JsonConvert.DeserializeObject<NTask>(json);

public sealed class NTask
{
    public DateTime launch_date { get; set; }
}

Alternatively I could use long and then parse it in another field but I'd rather avoid doing that, and have JsonConvert automatically parse it to DateTime through some converter.

See this question asked 19 hours ago stackoverflow.com/questions/8639315/… — L.B
– L.B, Commented Dec 27, 2011 at 17:08
@Babcock great link, thank you! If you want to post it as an answer I'll select it. — bevacqua
– bevacqua, Commented Dec 27, 2011 at 17:09

Community · Accepted Answer · 2017-04-13 12:25:39Z

3

You're going to want to use a JSONConverter to help manage the translation. See this stackapps answer for more detail.

edited Apr 13, 2017 at 12:25

CommunityBot

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answered Dec 27, 2011 at 18:38

M.Babcock

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Comments

joe_coolish · Accepted Answer · 2011-12-27 17:57:54Z

Here is some code to do that:

// This is an example of a UNIX timestamp for the date/time 11-04-2005 09:25.    
double timestamp = 1113211532;

// First make a System.DateTime equivalent to the UNIX Epoch.    
System.DateTime dateTime = new System.DateTime(1970, 1, 1, 0, 0, 0, 0);

// Add the number of seconds in UNIX timestamp to be converted.    
dateTime = dateTime.AddSeconds(timestamp);

For your code:

    JsonConvert.DeserializeObject<NTask>(json);  

    public sealed class NTask
    {
        public DateTime launch_date { get; set; }

        public void SetLaunchDate(int timestamp)
        {
            // First make a System.DateTime equivalent to the UNIX Epoch.    
            var dateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0);

            // Add the number of seconds in UNIX timestamp to be converted.    
            launch_date = dateTime.AddSeconds(timestamp);
        }
    }

Then when you are Deserializing the JSON, check to see if the launch_date is of type int or DateTime and switch how you set the object based on the type!

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