Convert JSON string into list of object in Dart

Question

Im trying to convert a string into list of object in dart. The string look like this:

My class model:

class Post {
  GetDataResult getDataResult;

  Post({this.getDataResult});

  Post.fromJson(Map<String, dynamic> json) {
    getDataResult = json['GetDataResult'] != null
        ? new GetDataResult.fromJson(json['GetDataResult'])
        : null;
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    if (this.getDataResult != null) {
      data['GetDataResult'] = this.getDataResult.toJson();
    }
    return data;
  }
}

class GetDataResult {
  String retVal;

  GetDataResult({this.retVal});

  GetDataResult.fromJson(Map<String, dynamic> json) {
    retVal = json['RetVal'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['RetVal'] = this.retVal;
    return data;
  }
}

Can anyone help me?

You can convert your json array into list of object such as click here — Darshan Prajapati
– Darshan Prajapati, Commented Jan 31, 2020 at 5:51

Rohit Soni · Accepted Answer · 2020-01-31 04:12:10Z

0

You need to use gson, convert your string into list of object, gson.fromJson() method return what you want json format :

SomeObject[] yourJson = gson.fromJson(jsonObject.toString(), SomeObject[].class);

Please try above can, if you still facing issues share your error.

answered Jan 31, 2020 at 4:12

Rohit Soni

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Comments

Balaji Ks · Accepted Answer · 2020-01-31 04:27:36Z

0

To convert the Json To String. For Example,

class sample {String name} print(sample.name.toString());

answered Jan 31, 2020 at 4:27

Balaji Ks

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Comments

Serpentarius · Accepted Answer · 2020-01-31 07:28:20Z

I solved it. First I create a new class model:

class Profesi {
  String id;
  String description;
  String idPekerjaan;

  Profesi({this.id, this.description, this.idPekerjaan});

  Profesi from ({object: Map}) {
    var map = object;
    return Profesi(
      id: map['ID'] as String,
      description: map['Description'] as String,
      idPekerjaan: map['IDPekerjaan'] as String,
    );
  }
}

in my postRequest method I prepare a variable to contain decoded json from my retVal:

List listJsonContent;
listJsonContent = json.decode(Post.fromJson(json.decode(response.body)).getDataResult.retVal);

Prepare a list of my new Profesi class and insert the object using add() method (here I insert just one: listJsonContent[0], you can insert all by iterate the list):

List<Profesi> profesi = List<Profesi>();
profesi.add(Profesi().from(object: listJsonContent[0]));

Try to print it to check:

print('${profesi[0].id}, ${profesi[0].idPekerjaan}, ${profesi[0].description}');

Balaji Ks · Accepted Answer · 2020-01-31 04:24:14Z

-1

Use this link to create the Dart Object from Json.

Visit https://javiercbk.github.io/json_to_dart/ this!

edited Jan 31, 2020 at 4:24

answered Jan 31, 2020 at 4:20

Balaji Ks

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1 Comment

Serpentarius Over a year ago

No. I need to convert the string value from JSON object. I already made the class model.

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