Xamarin Forms 将图像上传到网页 POST

Question

我有问题。我想将图像上传到网页，以便将其存储在我的服务器上。现在我可以找到很多上传文件到服务器的例子，但是图片呢？

我已经尝试创建图像的字节数组并将其作为 POST 发送，但是在以下行中崩溃说 URI 太长：

var postData = new List<KeyValuePair<string, string>>();
postData.Add(new KeyValuePair<string, string>("id", App.User.Id.ToString()));
postData.Add(new KeyValuePair<string, string>("image", ByteArray));
var content = new FormUrlEncodedContent(postData);

还有其他方法吗？

Answer 1

您可以尝试以下方法：

   //In Xamarin
        public void UploadImage()
        {
            //create an instance of webclient
            System.Net.WebClient Client = new System.Net.WebClient();

            //add the header
            Client.Headers.Add("Content-Type", "binary/octet-streOpenWriteam");

            //uploads the file and gets the result in a byte[]
            // change `weburl/controller/actionmethod` to our weburl 
            byte[] result = Client.UploadFile("weburl/controller/actionmethod", "POST", "pathToFile");

            //converts the result[] to a string
            string resultString = System.Text.Encoding.UTF8.GetString(result, 0, result.Length);
        }

更多详情，您可以查看：https://forums.xamarin.com/discussion/30653/how-to-upload-image-from-local-storage-to-asp-net-website

Xamarin Forms 将图像上传到网页 POST

Xamarin Forms Upload image to webpage as POST

c#

xamarin

xamarin.forms

httpwebrequest

httpclient