尝试使用dart将图像上传到flutter中的服务器 [英] Trying to upload the image to server in the flutter using dart

问题描述

我是Flutter开发的新手.我的问题是，当我尝试将图像上传到服务器时，出现以下错误:

I am new to Flutter development. My problem is that when I try to upload the image to the server I am getting following error:

 NoSuchMethodError: The getter 'body' was called on null.
    Receiver: null
    Tried calling: body

这是我的代码:

var response;
var booking_info_url='http://18.207.188.4/ruralpost/api/api.php?action=booking';
http.post(booking_info_url,body: {"userid":"3","weight":"20","quantity":"1","bimage":base64UrlEncode(await _image.readAsBytesSync())}).then(response);
{
    print("Response body: ${response.body}");
}

推荐答案

在您的代码中，您有两个不同版本的 response ，具有不同的范围，这不是您想要的.在 then 的正文之前删除"var response"和; .

In your code you have two different versions of response, with different scopes, which isn't what you intend. Remove the 'var response' and the ; before the body of the then.

String booking_info_url =
    'http://18.207.188.4/ruralpost/api/api.php?action=booking';
http.post(booking_info_url, body: {
  "userid": "3",
  "weight": "20",
  "quantity": "1",
  "bimage": base64UrlEncode(await _image.readAsBytesSync())
}).then((Response response) {
  print("Response body: ${response.body}");
});

这篇关于尝试使用dart将图像上传到flutter中的服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！