Codolex

Navigation: Activities > JSON

Get JSON value

The get JSON Value activity can be used to get a variable from an existing JSON Value.

GETJsonValue

Activity properties

begin

var MenuJSON: TJSONValue;

MenuJSON := JSON.GetValue<TJSONValue>('menu');

end;

Resulting code

The 'Key name with value' must be a attribute of the provided JSON Value.

The data type could be any data type if the value of the attribute can be parsed into an object.

e.g.

ExampleFlow

begin

var JSON: TJSONValue;

JSON := TJsonObject.ParseJsonValue('{"menu": {' +

' "id": "other",' +

' "value": "File",' +

' "popup": {' +

' "menuitem": [' +

' {"value": "New", "onclick": "CreateNewDoc()"},' +

' {"value": "Open", "onclick": "OpenDoc()"},' +

' {"value": "Close", "onclick": "CloseDoc()"}' +

' ]' +

' }' +

'}}');

var menu: HelpAndManualScreenshots.DataSource.JSONMenuDataSource.Imenu;

var JsonAdapter: ICodolexEntityJSONAdapter<HelpAndManualScreenshots.DataSource.JSONMenuDataSource.Imenu>;

JsonAdapter := TmenuJSONAdapter.Create;

var KeyNameValue := JSON.GetValue<TJsonValue>('menu');

var JsonValue := JsonAdapter.MapToEntity(KeyNameValue);

menu := JsonValue;

var DialogResult: Integer;

DialogResult := MessageDlg(menu.id, TMsgDlgType.mtInformation, [TMsgDlgBtn.mbOK], 0);

end;

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