Question

在Xamarin.Android项目的PCL项目中，当我执行httpClient.PostAsJsonAsync()或httpClient.PutAsJsonAsync()时，我收到以下错误。

错误：

System.TypeLoadException: Could not load type 'System.Net.Http.FormattingUtilities' from assembly 'System.Net.Http.Formatting, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

此代码中出现此错误：

public async Task<User> CreateUser(string name, string email, string password)
    {
        try
        {
            User user = new User();
            user.Name = name;
            user.Email = email;
            user.Password = password;

            var response = await _client.PostAsJsonAsync("myUrl", user); // error on this line
            string content = await response.Content.ReadAsStringAsync();

            return string.IsNullOrEmpty(content) ? new User() :
                JsonConvert.DeserializeObject<User>(content);
        }
        catch (JsonReaderException ex)
        {
            throw ex;
        }
        catch (WebException ex)
        {
            throw ex;
        }
        catch (Exception ex)
        {
            throw ex; // ex is null here
        }
}

Answer 1

我放弃了。

我把它改为：

string json = JsonConvert.SerializeObject(user);
var stringContent = new StringContent(json, Encoding.UTF8, "application/json");
var response = await _client.PostAsync(myUrl, stringContent);

现在可行。

无法加载类型＆＃39; System.Net.Http.FormattingUtilities＆＃39;

1 个答案: