C#: How to trim a json string and put values into correct class

Question

I have a JSON string that I want to cut and put values into correct class. How do I do that in C#?

{
     \"First\":{\"FirstBool\":1, \"aString\":\"hello\"},
     \"Second\":{\"AnotherBool\":0,\"aString\":\"Hi again\"},
     \"Third\":{\"ThirdBool\":0,\"aString\":\"Hi for the 3rd time\", \"AdditionalString\":\"ADDITIONAL STRING\"}
}

This is how I've set up my class for taking JSON values.

public class First{

public static bool FirstBool {get; set;}
public static string aString {get; set;}

}

public class Second{

public static bool AnotherBool {get; set;}
public static string aString {get; set;}

}

public class Third{

public static bool ThirdBool {get; set;}
public static string aString {get; set;}
public static string AdditionalString {get; set;}

}

Cut how? What is the expected result? Also those bools aren't proper in the JSON. — Sami Kuhmonen, Jan 11 '17 at 09:15
Any particular reason you don't just use a JSON parser? It's designed for this kind of thing, you know. — Abion47, Jan 11 '17 at 09:16
@SamiKuhmonen Maybe "cut" is wrong word. I just want to store `JSON` data into correct class. — user7399041, Jan 11 '17 at 09:16
Then you make a class that contains those and deserialize with any JSON deserializer? — Sami Kuhmonen, Jan 11 '17 at 09:17
@Abion47 Aah I had no clue about that since I'm new to `JSON`. Do you have any good and easy guide for a beginner? — user7399041, Jan 11 '17 at 09:17
@SamiKuhmonen I see, do you have any guide/example that you can link? Never done it before. — user7399041, Jan 11 '17 at 09:19
Pick a parser and look up tutorials on how to use it. Newtonsoft/JSON.Net is the most popular one. — Abion47, Jan 11 '17 at 09:19
Possible duplicate of [Parse JSON in C#](http://stackoverflow.com/questions/1212344/parse-json-in-c-sharp) — GilZ, Jan 11 '17 at 09:24

score 0 · Accepted Answer · edited May 23 '17 at 12:07

Your JSON string in invalid in First it was like "aString":"hello"" which should be "aString":"hello" So I hope and assumed it is a typo

You can install Newtonsoft JSON and then create class like

public class First
{
    [JsonProperty("FirstBool")]
    public int FirstBool { get; set; }

    [JsonProperty("aString")]
    public string aString { get; set; }
}

public class Second
{
    [JsonProperty("AnotherBool")]
    public int AnotherBool { get; set; }

    [JsonProperty("aString")]
    public string aString { get; set; }
}

public class Third
{
    [JsonProperty("ThirdBool")]
    public int ThirdBool { get; set; }

    [JsonProperty("aString")]
    public string aString { get; set; }

    [JsonProperty("AdditionalString")]
    public string AdditionalString { get; set; }
}

public class ClsResult
{
    [JsonProperty("First")]
    public First First { get; set; }

    [JsonProperty("Second")]
    public Second Second { get; set; }

    [JsonProperty("Third")]
    public Third Third { get; set; }
}

And Deserialize it like this

string jsonstr = File.ReadAllText(YourJSONFile);
var ser = JsonConvert.DeserializeObject<ClsResult>(jsonstr);

score 0 · Answer 2 · answered Jan 11 '17 at 09:20

First of all your class will look like

public class First {
    public int FirstBool { get; set; }
    public string aString { get; set; } 
}

public class Second {
    public int AnotherBool { get; set; }
    public string aString { get; set; } 
}

public class Third {
    public int ThirdBool { get; set; }
    public string aString { get; set; }
    public string AdditionalString { get; set; } 
}

public class Result {
    public First First { get; set; }
    public Second Second { get; set; }
    public Third Third { get; set; } 
}

and then you can Deserialize your json using JavaScriptSerializer

JavaScriptSerializer json_serializer = new JavaScriptSerializer();
Result objResult =  (Result)json_serializer.DeserializeObject("<your JSON>");

score 0 · Answer 3 · answered Jan 11 '17 at 09:23

If you are using visual studio, you could find out the class structure required for any json using Edit-> Paste Special -> Paste JSON as classes.

Create a root class which can be de-serialized to match your requirement.

public class Rootobject
{
    public First First { get; set; }
    public Second Second { get; set; }
    public Third Third { get; set; }
}

public class First
{
    public int FirstBool { get; set; }
    public string aString { get; set; }
}

public class Second
{
    public int AnotherBool { get; set; }
    public string aString { get; set; }
}

public class Third
{
    public int ThirdBool { get; set; }
    public string aString { get; set; }
    public string AdditionalString { get; set; }
}

C#: How to trim a json string and put values into correct class

3 Answers3