How can I parse such json string

Question

I receive a json string from webclient such like below:

"{\"1\": \"on\", \"2\": \"on\"}"

Now I should convert it into some struct and fetch the value,the point is the value is not fixed, it may be this:

"{\"1\": \"on\", \"2\": \"on\", \"3\": \"off\"}"

or this

"{\"1\": \"on\", \"2\": \"off\", \"3\": \"on\", \"4\": \"on\"}"

so my question is how can I parse such string. I need to fetch the value which is "on".

Thanks

You need to deserialize into Dictionary<string, object>, since members in C# cannot begin with a number. — Rob
– Rob ♦, Commented Feb 2, 2016 at 5:10
You r converting to json double times, show us the code where u r converting to json — Mir Gulam Sarwar
– Mir Gulam Sarwar, Commented Feb 2, 2016 at 5:29

Milind Thakkar · Accepted Answer · 2016-02-02 05:11:14Z

2

You could use JSON.Net (http://www.newtonsoft.com/json ) which is also available to NuGet.

JObject obj = JObject.Parse("{\"1\": \"on\", \"2\": \"on\", \"3\": \"off\"}");
        var val = (string)obj.Descendants()
                   .OfType<JProperty>()
                   .Where(x => x.Value.ToString() == "on")
                   .First().Name;

This will get you first node with value "on"

answered Feb 2, 2016 at 5:11

Milind Thakkar

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Ashok Patel · Accepted Answer · 2016-02-02 05:13:18Z

2

Dependency for this is :Newtonsoft.Json,Newtonsoft.Json.Linq; http://www.newtonsoft.com/json

You can use following code to find the value of on.

 //var test = "{\"1\": \"on\", \"2\": \"on\"}";

//var test = "{\"1\": \"on\", \"2\": \"on\", \"3\": \"off\"}";

var test = "{\"1\": \"on\", \"2\": \"off\", \"3\": \"on\", \"4\": \"on\"}";

JObject obj = JObject.Parse(test);

foreach (var pair in obj)
{
  if (obj[pair.Key].ToString() == "on")
  {
    Console.WriteLine(pair.Key);
  }
}

answered Feb 2, 2016 at 5:13

Ashok Patel

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1 Comment

Ashok Patel Over a year ago

Yes. Both way possible. Linq or Query

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