Flutter: Passing list from one page to another page

Question

I working on a flutter project. I want to pass list from one page to another page. but it not working out for me

List list;

    articleCall save = await Navigator.of(context).push(new MaterialPageRoute<articleCall>(
                builder: (BuildContext context) {
                  return new AddArticleDialog(list);
                },
        -----------

        class AddArticleDialog extends StatefulWidget {

            List ls=[];

          AddArticleDialog({this.ls});
          @override
          AddArticleDialogState createState() => new AddArticleDialogState();
        }

It says me the error: Too many positional arguments: 0 expected, but 1 found. Please help

Thanks, Sathish

`return new AddArticleDialog(list);` - should be - `return new AddArticleDialog(ls: list);` — anmol.majhail, Jun 05 '19 at 05:27
do you **really** want to have a parameter named `ls`? does it say anything to anyone? also what is the purpose on such named parameter if you have only one? just remove `{` and `}` and make it positional — pskink, Jun 05 '19 at 05:31

score 0 · Answer 1 · answered Feb 20 '23 at 02:42

When braces {} are used on constructor parameters, it will become named parameters as mentioned in the docs.

Having the constructor as

List? ls=[]; // List should be nullable since the argument is optional
AddArticleDialog({this.ls});

will require it to use an identifier for the argument.

return AddArticleDialog(ls: list);

Flutter: Passing list from one page to another page

1 Answers1