How can I deserialise an array of Json objects

Question

User-963208184 posted

Hi All,

I have a called a method that returns an array of data in the form

[JSON]
  [0]
    prop1 : "value"
    .........
  [1]
    prop1 : "value"
    .......
  [2]
    .......

each item of the array have the same properties.

I have created a class that has all the properties of an array item and a  further class with a single property of type IEnumerable<propertiesClass>.

I thought I'd be able to get away with something like:

 IEnumerable<propertiesClass> = new JavaScriptSerializer().Deserialize<IEnumerable<propertiesClass>>(returnedString);

Answer 1

User-271186128 posted

Hi billcrawley,

As for this issue, will you please tell me how do you generate the JSON string? <o:p></o:p>

I thought I'd be able to get away with something like:

 IEnumerable<propertiesClass> = new JavaScriptSerializer().Deserialize<IEnumerable<propertiesClass>>(returnedString);

Besides, from your description, if you mean you don't want to use JavaScriptSerializer().Deserialize() method, I suppose you could try to use JsonConvert.SerializeObject and

JsonConvert.DeserializeObject method. Here is a sample, please refer to it:

            List<User> list = new List<WebApplication1.Test1.User>();
            list.Add(new User() { UserID = 1001, UserName = "AAA" });
            list.Add(new User() { UserID = 1002, UserName = "BBB" });
            list.Add(new User() { UserID = 1003, UserName = "CCC" });
            list.Add(new User() { UserID = 1004, UserName = "DDD" });
            list.Add(new User() { UserID = 1005, UserName = "EEE" });

            string str1 = JsonConvert.SerializeObject(list);
            TextBox1.Text = str1; //output:[{"UserID":1001,"UserName":"AAA"},{"UserID":1002,"UserName":"BBB"},{"UserID":1003,"UserName":"CCC"},{"UserID":1004,"UserName":"DDD"},{"UserID":1005,"UserName":"EEE"}]
            
            List<User> list2 = JsonConvert.DeserializeObject<List<User>>(str1);
            TextBox2.Text = list2[2].UserName;

If you don't want to use DeserializeObject() method, I suppose you need to use String.Split() method to split the string and use for loop to get the special data.

Best Regards,
Dillion

Answer 2

User753101303 posted

Hi,

Some more context could still help. In most cases it should be handled for you. For example if you are calling a service you get back a string if working at a low level but if using a client such as HttpClient then deserialization is handled for you.

Make sure you don't try to code something that could have been done automatically for you...