如何从Javascript中的json提取值？

Question

I am trying to read first value from below json array

 var json = "[{\"First\",\"Second\"}]";

How do i get value first from above json array.

    var result = JObject.Parse(json);
   var result = JArray.Parse(json);

I tried above things but both throwing exception.

Answer 1

Newtonsoft.JSON is a good solution for this kind of situations. Also Newtonsof.JSON is faster than others such as JavaScriptSerializer , DataContractJsonSerializer .

In this sample , you can the following :

var jsonData = JObject.Parse("your json data here");

Then you can cast jsonData to JArray and you can use for loop to get data at each iteration. Also, I want to add something.

Working with dynamic object and using Newtonsoft serialize is a good choice.

Answer 2

var json = "[{\"First\",\"Second\"}]";

dynamic result = JsonConvert.DeserializeObject(json);

As you are using jObject It's look like c# code. You can read the json as the given code.

Answer 3

JSON is not a list format, but works like a key value data structure. Try this little Javascript in your browser console to understand, how it is supposed to work.

obj = JSON.parse("{\"first\":\"First value\", \"second\":\"Second Value, maybe some more text?\"}");
console.log(obj.first);
console.log(obj.second);

Prints:

First value
Second Value, maybe some more text?