What Is the Simplest C# Function to Parse a JSON String into an Object

What is the simplest C# function to parse a JSON string into an object?

DataContractJsonSerializer serializer = 
    new DataContractJsonSerializer(typeof(YourObjectType));

YourObjectType yourObject = (YourObjectType)serializer.ReadObject(jsonStream);

You could also use the JavaScriptSerializer, but DataContractJsonSerializer is supposedly better able to handle complex types.

Oddly enough JavaScriptSerializer was once deprecated (in 3.5) and then resurrected because of ASP.NET MVC (in 3.5 SP1). That would definitely be enough to shake my confidence and lead me to use DataContractJsonSerializer since it is hard baked for WCF.

Convert JSON String To C# Object

It looks like you're trying to deserialize to a raw object. You could create a Class that represents the object that you're converting to. This would be most useful in cases where you're dealing with larger objects or JSON Strings.

For instance:

  class Test {

      String test; 

      String getTest() { return test; }
      void setTest(String test) { this.test = test; }

  }

Then your deserialization code would be:

   JavaScriptSerializer json_serializer = new JavaScriptSerializer();
   Test routes_list = 
          (Test)json_serializer.DeserializeObject("{ \"test\":\"some data\" }");

More information can be found in this tutorial:
http://www.codeproject.com/Tips/79435/Deserialize-JSON-with-Csharp.aspx

Convert JSON String to JSON Object c#

JObject defines method Parse for this:

JObject json = JObject.Parse(str);

You might want to refer to Json.NET documentation.

Parse Json string in C#

I'm using Json.net in my project and it works great. In you case, you can do this to parse your json:

EDIT: I changed the code so it supports reading your json file (array)

Code to parse:

void Main()
{
    var json = System.IO.File.ReadAllText(@"d:\test.json");

    var objects = JArray.Parse(json); // parse as array  
    foreach(JObject root in objects)
    {
        foreach(KeyValuePair<String, JToken> app in root)
        {
            var appName = app.Key;
            var description = (String)app.Value["Description"];
            var value = (String)app.Value["Value"];

            Console.WriteLine(appName);
            Console.WriteLine(description);
            Console.WriteLine(value);
            Console.WriteLine("\n");
        }
    }
}

Output:

AppName
Lorem ipsum dolor sit amet
1

AnotherAppName
consectetur adipisicing elit
String

ThirdAppName
sed do eiusmod tempor incididunt ut labore et dolore magna aliqua
Text

Application
Ut enim ad minim veniam
100

LastAppName
quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat
ZZZ

BTW, you can use LinqPad to test your code, easier than creating a solution or project in Visual Studio I think.

Convert string to json using C#

You can do something like this:

var jobject = JsonConvert.DeserializeObject<JObject>(yourVariable);

this is using Newtonsoft's json library that you can get from nuget.

Also JObject is the C# equivalent to a JSON object so that's probably something you'll want to use.

Parse JSON String to JSON Object in C#.NET

use new JavaScriptSerializer().Deserialize<object>(jsonString)

You need System.Web.Extensions dll and import the following namespace.

Namespace: System.Web.Script.Serialization

for more info MSDN

Json string to c# object

The following structure should get you started:

public class ReceiptCR
{
    public string[] VchNo { get; set; }
    public string[] VoucherName { get; set; }
    public string[] VchDate { get; set; }
    ...
}

public class ReceiptDR
{
    public string[] VchNo { get; set; }
    public string[] VoucherName { get; set; }
    public string[] VchDate { get; set; }
    ...
}

public class PaymentDR 
{
    public string[] VchNo { get; set; }
    public string[] VoucherName { get; set; }
    public string[] VchDate { get; set; }
    ...
}

And then define the wrapper:

public class Root
{
    public ReceiptCR Receipt_cr { get; set; }
    public ReceiptDR Receipt_dr { get; set; }
    public PaymentDR Payment_dr { get; set; }
}

which you could deserialize from the json string:

string json = ...
Root result = JsonConvert.DeserializeObject<Root>(json);

Parsing json objects

Create a new class that your JSON can be deserialized into such as:

public class UserInfo
{
    public string single_token { get; set; }
    public string username { get; set; }
    public string version { get; set; }
}

public partial class Downloader : Form
{
    public Downloader(string url, bool showTags = false)
    {
        InitializeComponent();
        WebClient client = new WebClient();
        string jsonURL = "http://localhost/jev";
        source = client.DownloadString(jsonURL);
        richTextBox1.Text = source;
        JavaScriptSerializer parser = new JavaScriptSerializer();
        var info = parser.Deserialize<UserInfo>(source);

        // use deserialized info object
    }
}

---

Related Topics