How to Pick files and Images for upload with flutter web

问题

I would like to know how to pick an Image from the users computer into my flutter web app for upload

回答1:

I tried the code below and it worked.

first import 'dart:html';

// variable to hold image to be displayed 

      Uint8List uploadedImage;

//method to load image and update `uploadedImage`


    _startFilePicker() async {
    InputElement uploadInput = FileUploadInputElement();
    uploadInput.click();

    uploadInput.onChange.listen((e) {
      // read file content as dataURL
      final files = uploadInput.files;
      if (files.length == 1) {
        final file = files[0];
        FileReader reader =  FileReader();

        reader.onLoadEnd.listen((e) {
                    setState(() {
                      uploadedImage = reader.result;
                    });
        });

        reader.onError.listen((fileEvent) {
          setState(() {
            option1Text = "Some Error occured while reading the file";
          });
        });

        reader.readAsArrayBuffer(file);
      }
    });
    }

now just any Widget, like a button and call the method _startFilePicker()

来源：https://stackoverflow.com/questions/56252856/how-to-pick-files-and-images-for-upload-with-flutter-web