Datacontractjsonserializer - deserializing datetime

Question

5.00/5 (2 votes)

See more:

Currently I have a json string in which date format is like this "2012-03-01T08:00:00". whenever try to deserialize, it is showing "does not start with '/Date(' and end with ')/"

What I have tried:

public static T JsonDeserialize<T>(string jsonString)
    {
        //Convert "yyyy-MM-dd HH:mm:ss" String as "\/Date(1319266795390+0800)\/"
        string p = @"\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}";

    MatchEvaluator matchEvaluator = new MatchEvaluator(
            ConvertDateStringToJsonDate);
        Regex reg = new Regex(p);
        jsonString = reg.Replace(jsonString, matchEvaluator);
        DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(T));
        MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(jsonString));
        T obj = (T)ser.ReadObject(ms);
        return obj;
    }

Posted 8-Nov-17 15:53pm

Ye Htut

Updated 8-Nov-17 23:14pm

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Graeme_Grant · Answer 1 · 2017-11-08T23:14:00

The above code looks overly complicated. Working with JSON does not need to be that hard.

To decode the date, I am assuming, form your information above, that your raw JSON data looks something like:

{ "birthday":"2012-03-01T08:00:00" }

This is a known format for the DataContractJsonSerializer. To decode, you would use something like this class:

C#

[DataContract]
public class Example
{
    [DataMember(Name="birthday")]
    public DateTime Birthday { get; set; }
}

The above class was generated using JsonUtils[^] website with the above JSON data.

To see this in action, I would use this Help Class[^]. It uses Json.Net[^]:

C#

using Newtonsoft.Json;
using System.Collections.Generic;

namespace Support.CSharp
{
    public static class JsonHelper
    {
        public static string FromClass<T>(T data, bool isEmptyToNull = false,
                                          JsonSerializerSettings jsonSettings = null)
        {
            string response = string.Empty;

            if (!EqualityComparer<T>.Default.Equals(data, default(T)))
                response = JsonConvert.SerializeObject(data, jsonSettings);

            return isEmptyToNull ? (response == "{}" ? "null" : response) : response;
        }

        public static T ToClass<T>(string data,
                                   JsonSerializerSettings jsonSettings = null)
        {
            var response = default(T);

            if (!string.IsNullOrEmpty(data))
                response = jsonSettings == null
                    ? JsonConvert.DeserializeObject<T>(data)
                    : JsonConvert.DeserializeObject<T>(data, jsonSettings);

            return response;
        }
    }
}

And to use:

C#

var rawJson = "{ \"birthday\":\"2012-03-01T08:00:00\" }";
var result = JsonHelper.ToClass<Example>(rawJson);

The Working with JSON in C# & VB[^] article goes into a lot more detail (with downloadable fully working code) for working with JSON that you should find helpful. :)