C#/ASP.NET JSON date deserialize

Question

I'm trying to deserilize an object the following code, and I'm wondering what the proper regex would be to replace json dates. When I run the following code, the regex never gets triggered. I'm using the standard JSON date format inside the json string.

{
    "UniqueId": "1000000003",     
    "Id": 3, 
    "ModifyTimestamp": "/Date(1338857699743)/"         
}

string json = // see above
string p = @"\\/Date\((\d+)\+\d+\)\\/";
MatchEvaluator matchEvaluator = new MatchEvaluator(convertJsonDateToDateString);
Regex reg = new Regex(p);
json = reg.Replace(json, matchEvaluator);
JavaScriptSerializer serializer = new JavaScriptSerializer();            
Student student = serializer.Deserialize<Student>(json) as Student; 



public static string convertJsonDateToDateString(Match m) {
        string result = string.Empty;
        DateTime dt = new DateTime(1970, 1, 1);
        dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));
        dt = dt.ToLocalTime();
        result = dt.ToString("yyyy-MM-dd HH:mm:ss");
        return result;
    }

Faraday · Accepted Answer · 2012-06-05 03:55:11Z

5

Here is a fully working solution:

using System;
using System.Windows.Forms;
using System.Text.RegularExpressions;

namespace ResolveOverlapIssue
{
    public partial class Form1 : Form
    {
        private static void DoSomethingElse<T>(ref T Id)
        {
            int i = 00;
        }

        public Form1()
        {
            InitializeComponent();

            string json = "{" +
                          "UniqueId: 1000000003," +
                          "Id: 3," +
                          "ModifyTimestamp: /Date(1338857699743)/" +
                          "}";

            MatchEvaluator matchEvaluator = ConvertJsonDateToDateString;
            var reg = new Regex(@".Date\(\d+\)\/.");
            json = reg.Replace(json, matchEvaluator);

        }

        public static string ConvertJsonDateToDateString(Match m)
        {
            var dt = new DateTime(1970, 1, 1);
            dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));
            dt = dt.ToLocalTime();
            var result = dt.ToString("yyyy-MM-dd HH:mm:ss");
            return result;
        }
    }
}

edited Jun 5, 2012 at 3:55

answered Jun 5, 2012 at 2:31

Faraday

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18 Comments

Adam Levitt Over a year ago

Thanks for the answer... I actually have about 5 or 6 dates in the object, so I won't know what the actual date is. What could I put inside the <ticks> to have it pick up the actual number as a Regex value as well?

Faraday Over a year ago

Once you decide that everything is working OK, feel free to upvote the hell out of me, I need the points ;)

Faraday Over a year ago

Can you paste a working (sample) on pastebin or somewhere else so that I can see exactly what you are doing and try to debug it? It's 04:04 here in the UK so I'm going to sleep soon... But I can hang around and help you out first...

Faraday Over a year ago

@AdamLevitt hahahaha, StackOverflow appears to be changing what I write... I checked pastebin and it's right on there: pastebin.com/jtTaJmSq Don't forget to upvote me... It's worth it, like pantenne...

Faraday Over a year ago

@AdamLevitt right. Sorry to mess you about, or to have messed you about... Here is a fully working solution. I can see it firing the correct method when it should and not firing when it shouldn't. pastebin.com/fhjSx6gD

|

Alexei Levenkov · Accepted Answer · 2012-06-05 02:14:04Z

0

@"\\/Date portion look wrong. It probably should be either @"\/Date..." or "\\/Data...". (same for trailing "...\\/")

answered Jun 5, 2012 at 2:14

Alexei Levenkov

101k15 gold badges138 silver badges189 bronze badges

2 Comments

Adam Levitt Over a year ago

I'm not sure I follow... isn't that what I already have? -- string p = @"\\/Date((\d+)\+\d+)\\/";

Alexei Levenkov Over a year ago

No.Vijay have it correct in his answer - no double escaping of ` as you get in case of using @` in front of string: @"\\" produces 2 back slashes, "\\" produces just one.

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