Creating single Array of objects from multiple array objects in c#

Question

I have a web API response like below and I need to move all objects into a single array in C# ASP.NET

[
   [
      {
         "id":23,
         "name":"John",
         "email":"[email protected]",
         "appointment_date":"tomorrow",
         "appointment_category":3,
         "time":"morning"
      },
      {
         "id":35,
         "name":"John",
         "email":"[email protected]",
         "appointment_date":"tomorrow",
         "appointment_category":4,
         "time":"afternoon"
      }
   ],
   [
      {
         "id":17,
         "name":"Alex",
         "email":"Alex @domain.com",
         "appointment_date":"tomorrow",
         "appointment_category":3,
         "time":"morning"
      }
   ],
   [
      {
         "id":22,
         "name":"Bob",
         "email":"[email protected]",
         "appointment_date":"tomorrow",
         "appointment_category":5,
         "time":"morning"
      }
   ]
]

I want to move all objects into single array. Like below

[
   {
      "id":23,
      "name":"John",
      "email":"[email protected]",
      "appointment_date":"tomorrow",
      "appointment_category":3,
      "time":"morning"
   },
   {
      "id":17,
      "name":"John",
      "email":"[email protected]",
      "appointment_date":"tomorrow",
      "appointment_category":3,
      "time":"morning"
   },
   {
      "id":17,
      "name":"John",
      "email":"[email protected]",
      "appointment_date":"tomorrow",
      "appointment_category":3,
      "time":"morning"
   }
]

Please help me Thank u

result.SelectMany(x => x).ToArray()

NotFound
– NotFound

2020-09-11 12:25:03 +00:00
Commented Sep 11, 2020 at 12:25 — NotFound
– NotFound, Commented Sep 11, 2020 at 12:25

VDWWD · Accepted Answer · 2020-09-11 14:15:14Z

1

Not sure if you have deserialized the json already. But you can do it like this. Create 2 classes and deserialize with Newtonsoft.Json. Then use Linq with SelectMany to get a list of single object.

//deseralize the json
var list1 = JsonConvert.DeserializeObject<List<List<Class2>>>(json);

//select all the nested items
var list2 = list1.SelectMany(x => x).ToList();

The classes

public class Class1
{
    public List<Class1> list { get; set; }
}


public class Class2
{
    public int id { get; set; }
    public string name { get; set; }
    public string email { get; set; }
}

answered Sep 11, 2020 at 14:15

VDWWD

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2 Comments

Venkat Over a year ago

Thanks for u response .without creating classes is n't possible?.Actually I am adding the response dynamically to the list(List<object> data = new List<object>) and finally returning data.

VDWWD Over a year ago

No not really. Without classes you have to manipulate the json string itself. Which gets messy fast.

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