在Flutter中上传带有http.post和注册表格的图片？

试试这个

在fileList中，您应该添加要上传的任何文件

    List<MultipartFile> fileList = List();    fileList.add(MultipartFile.fromBytes(        'documents', await filePath.readAsBytes(),        filename: fileName));

对于其他零件参数，请使用参数映射

    Map<String, String> params = {      "first_name": widget.mUserDetailsInputmodel.firstName,      "last_name": widget.mUserDetailsInputmodel.lastName,      "email": widget.mUserDetailsInputmodel.emailAddress,    };

然后像这样发送请求

  Future<String> multipartRequest({var url, var partParams, var files}) async {    Map<String, String> headers = {      "X-API-KEY": X_API_KEY,      "Accept": "application/json",      "User-Auth-Token": authToken };    var request = http.MultipartRequest("POST", Uri.parse(url));    request.headers.addAll(headers);    if (partParams != null) request.fields.addAll(partParams);// add part params if not null    if (files != null) request.files.addAll(files);// add files if not null    var response = await request.send();    var responseData = await response.stream.toBytes();    var responseString = String.fromCharCodes(responseData);    print("responseBody " + responseString);    if (response.statusCode == 200) return responseString;  }