如何将图像列表发布到Dio？

Question

端点的签名是：

public async Task<ActionResult> Post([FromForm]List<IFormFile> imgFile)

与Postman尝试过，效果很好。

此代码有效：

List<String> ss = partInfo.rejectionPicturesPath;
FormData formData = FormData.fromMap({
  "imgFile": await MultipartFile.fromFile(ss[0]),
});

现在的问题是如何编写它，以便可以将其作为列表发送...

// Don't work
List<FormData> formData = [];
await Future.forEach(partInfo.rejectionPicturesPath, (p) async {
  formData.add(FormData.fromMap({
    "imgFile" : await MultipartFile.fromFile(p),
  }));
});

// Don't work
List<String> ss = partInfo.rejectionPicturesPath;
FormData formData = FormData.fromMap({
  "imgFile": await MultipartFile.fromFile(ss[0]),
  "imgFile": await MultipartFile.fromFile(ss[1]),
});

// Don't work either
FormData formData = FormData.fromMap({
  "imgFile": [
    await MultipartFile.fromFile(ss[0]),
    await MultipartFile.fromFile(ss[1]),
  ]
});

我以这种方式发送：

BaseOptions options = BaseOptions(
  contentType: "multipart/form-data"
);
var dio = Dio(options);
(dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate = (HttpClient client) {
  client.badCertificateCallback = (X509Certificate cert, String host, int port) => true;
  return client;
};

// I'm stuck here trying to build a list of the images, see non working codes above

var resp = await dio.post(baseUrl, data: data);

如何发送图像列表？我很确定这是可以做到的，因为Postman可以很好地发布它。如何将其写到Dart的代码中？

Answer 1

设法使它起作用：

List<String> ss = partInfo.rejectionPicturesPath;
var data = FormData();
data.files.addAll([
  MapEntry(
    "imgFile",
    await MultipartFile.fromFile(ss[0]),
  ),
  MapEntry(
    "imgFile",
    await MultipartFile.fromFile(ss[1]),
  ),
]);