How to will json data convert to object in c#?

Ken H

hi all,

Here is my code, attempts to convert the JSON data object, but failed to pass:

namespace ParseJson{

using System;
using Newtonsoft.Json;
class Program{

static void Main(string[] args){

string json = "{\"Verson\":\"2014\",\"Product\":[{\"ProductName\":\"Scottish cookies\",\"ProductionPlace\":{\"City\":\"Edinburgh\",\"State\":\"United Kingdom\"},\"Date\":\"14/10/2014\"}]\"}";
ProductInfo des = JsonConvert.DeserializeObject(json);

}

public class ProductInfo
{

public ProductInfo() { }
public string Verson { get; set; }
public string ProductName { get; set; }
public Address ProductionPlace { get; set; }
public DateTime Date { get; set; }

}

public class Address{

public Address() { }
public string City { get; set; }
public string State { get; set; }

}

}

Thanks.

10 Replies

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Ramesh Maruthi12y ago
Accepted answer
Hey Ken,

Once try this

class Program
{
static void Main(string[] args)
{

string json = "{\"Verson\":\"2014\",\"Product\":[{\"ProductName\":\"Scottish cookies\",\"ProductionPlace\":{\"City\":\"Edinburgh\",\"State\":\"United Kingdom\"},\"Date\":\"14/10/2014\"}]}";
ProductInfo des = JsonConvert.DeserializeObject(json);

}
}

public class ProductInfo
{
public ProductInfo() { }
public string Verson { get; set; }

public Product[] product { get; set; }
}
public class Address
{
public Address() { }
public string City { get; set; }
public string State { get; set; }
}

public class Product
{
public string ProductName { get; set; }
public Address ProductionPlace { get; set; }
public string Date { get; set; }

}
}
Ramesh Maruthi12y ago
yw !! Ken :)
Ken H12y ago
Thank you for your help. :)
Ramesh Maruthi12y ago
Other wise you can also use JsonIgnore on the top of particular field , see this link once

http://james.newtonking.com/archive/2009/10/23/efficient-json-with-json-net-reducing-serialized-json-size

class Program
{
static void Main(string[] args)
{
string json = "{\"Verson\":\"2014\",\"Product\":[{\"ProductName\":\"Scottish cookies\",\"ProductionPlace\":{\"City\":\"Edinburgh\",\"State\":\"United Kingdom\"},\"Date\":\"14/10/2014\"}]}";
ProductInfo des = JsonConvert.DeserializeObject(json);

}
}
public class ProductInfo
{

public ProductInfo() { }

[JsonIgnore]
public string Verson { get; set; }

public Product[] product { get; set; }
}

public class Address
{
public Address() { }

public string City { get; set; }
public string State { get; set; }
}
public class Product
{
public string ProductName { get; set; }

public Address ProductionPlace { get; set; }
public string Date { get; set; }

}
Ramesh Maruthi12y ago
class Program
{
static void Main(string[] args)
{
string json = "{\"Verson\":\"2014\",\"Product\":[{\"ProductName\":\"Scottish cookies\",\"ProductionPlace\":{\"City\":\"Edinburgh\",\"State\":\"United Kingdom\"},\"Date\":\"14/10/2014\"}]}";
ProductInfo des = JsonConvert.DeserializeObject(json);

}
}
[DataContract]
public class ProductInfo
{

public ProductInfo() { }

[IgnoreDataMember]
public string Verson { get; set; }

[DataMember]
public Product[] product { get; set; }
}

[DataContract]
public class Address
{
public Address() { }

[DataMember]
public string City { get; set; }
[DataMember]
public string State { get; set; }
}
[DataContract]
public class Product
{
[DataMember]
public string ProductName { get; set; }
[DataMember]
public Address ProductionPlace { get; set; }
[DataMember]
public string Date { get; set; }

}

you can ignore the datamemeber which you doesn't want to display ([IgnoreDataMember]) see in the above example i ignored Verson, hope this helps you :)
Vulpes12y ago
As the only 'Select' in the program is in this line:

string[] products = this.Product.Select(p => p.ToString()).ToArray();

I can only think that you don't have this 'using' directive in your version of the program:

using System.Linq;
Ken H12y ago
Hello Ramesh,

If I just want to get specific data, then what should be done?
For example, just below a bold font data(Other ignore):

[
"PropertyName1":"Value1",
"PropertyName2":"Value2",
"PropertyName3":"Value3",
"Product":[{
"ProductName":"Scottish cookies",
"ProductionPlace":{
"City":"Edinburgh",
"State":"United Kingdom"
}
}],
"Date":"14/10/2014"
]

Thanks.
Ken H12y ago
Thank you Ramesh,Vulpes. :)
Ken H12y ago
Hello Vulpes,
An error occurred: does not contain a "Select" is defined.
Vulpes12y ago
It's also possible to do this without leaving the .NET framework using the DataContractJsonSerializer. However, you do need to decorate the classes and their properties with some attributes:

using System;
using System.IO;
using System.Text;
using System.Linq;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;

namespace ParseJson
{
class Program
{
static void Main(string[] args)
{
string json = "{\"Verson\":\"2014\",\"Product\":[{\"ProductName\":\"Scottish cookies\",\"ProductionPlace\":{\"City\":\"Edinburgh\",\"State\":\"United Kingdom\"},\"Date\":\"14/10/2014\"}]}";
byte[] data = Encoding.UTF8.GetBytes(json);
var ms = new MemoryStream(data);
var dcjs = new DataContractJsonSerializer(typeof(ProductInfo));
ProductInfo des = (ProductInfo)dcjs.ReadObject(ms);
Console.WriteLine(des);
Console.ReadKey();
}
}

[DataContract]
public class ProductInfo
{
public ProductInfo() { }

[DataMember]
public string Verson { get; set; }

[DataMember]
public Product[] Product { get; set; }

public override string ToString()
{
string[] products = this.Product.Select(p => p.ToString()).ToArray();
return String.Format("Verson = {0}\nProduct := \n{1}", Verson, String.Join(" ,", products));
}
}

[DataContract]
public class Product
{
[DataMember]
public string ProductName { get; set; }

[DataMember]
public Address ProductionPlace { get; set; }

[DataMember]
public string Date { get; set; }

public override string ToString()
{
return String.Format(" ProductName = {0}\n ProductionPlace := \n{1}\n Date = {2}", ProductName, ProductionPlace, Date);
}
}

[DataContract]
public class Address
{
public Address() { }

[DataMember]
public string City { get; set; }

[DataMember]
public string State { get; set; }

public override string ToString()
{
return String.Format(" City = {0}\n State = {1}", City, State);
}
}

The output is:

Verson = 2014
Product :=
ProductName = Scottish cookies
ProductionPlace :=
City = Edinburgh
State = United Kingdom
Date = 14/10/2014