Single string in json to deserialze c#

Question

I have following string in JSON

string IDS = "{\"IDS\":\"23,24,25,28\"}"

Now I need to convert this into c# string

I tried this

string id = new JavaScriptSerializer().Deserialize<string>(IDS);

I want to get back this comma separated string in a string, but it throws error

No parameterless constructor defined for type of 'System.String

Any help what to do ?

Thanks

"it throws error" is never enough detail. It's also unclear whether those backslashes are actually in the string, or whether that's a source-code representation of the string. It would really help if you'd provide a minimal reproducible example. — Jon Skeet
– Jon Skeet, Commented Sep 1, 2016 at 6:48
you want to deserialize a string into a string ? no, you dont. you're expecting an array i guess. try "var id" instead of "string id" in your second line of code you shared. — Doruk
– Doruk, Commented Sep 1, 2016 at 6:52

Matthias Burger · Accepted Answer · 2016-09-01 06:53:48Z

6

It's because your json string is a Dictionary. Try it with something like this

var result = new JavaScriptSerializer().Deserialize<Dictionary<string, string>>(IDS);
var mystring = result["IDS"];

answered Sep 1, 2016 at 6:53

Matthias Burger

5,9747 gold badges58 silver badges110 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Igor Damiani · Accepted Answer · 2016-09-01 07:00:46Z

1

I prefer this solution using JSON.net:

class Program
{
    static void Main(string[] args)
    {
        string IDS = "{\"IDS\":\"23,24,25,28\"}";
        var obj = JsonConvert.DeserializeObject<MyClass>(IDS);
        Console.WriteLine(obj.IDS);
        Console.ReadLine();
    }
}

class MyClass
{
    public string IDS { get; set; }
}

answered Sep 1, 2016 at 7:00

Igor Damiani

1,92711 silver badges13 bronze badges

1 Comment

Matthias Burger Over a year ago

I love to work with Newtonsofts JSON.net, +1 for suggesting it.

Low Flying Pelican · Accepted Answer · 2016-09-01 07:03:23Z

1

The error occurs because you are using the incorrect type string to deserialize, it should be a Dictionary as Matthias Burger mentioned. However you can use dynamic type,

string json = "{\"IDS\":\"23,24,25,28\"}";
var jobject = new JavaScriptSerializer().Deserialize<dynamic>(json );
string ids = jobject["IDS"]

answered Sep 1, 2016 at 7:03

Low Flying Pelican

6,0621 gold badge36 silver badges44 bronze badges

Collectives™ on Stack Overflow

Single string in json to deserialze c#

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related