Windows Phone 8.1 缺少 MultipartFormDataContent

Question

为什么我不能使用 MultipartFormDataContent 和 StreamContent？
我收到以下错误：

The type or namespace name 'MultipartFormDataContent' could not be found (are you missing a using directive or an assembly reference?)

这是我的代码：

var fileUploadUrl = @"http://<IPaddress>:<port>/fileupload";
                var client = new HttpClient();
                photoStream.Position = 0;
                MultipartFormDataContent content = new MultipartFormDataContent();
                content.Add(new StreamContent(photoStream), "file", fileName);
                await client.PostAsync(fileUploadUrl, content)
                    .ContinueWith((postTask) =>
                    {
                        postTask.Result.EnsureSuccessStatusCode();
                    });

Answer 1

你必须 add System.Net.Http class

using System.Net.Http