我遇到一个问题,无法在 WebAPI 项目中追踪其根源。 API 一直在工作,但是,在部署时,我发现收到与对象序列化相关的错误,该错误暗示我需要类上的 DataContract
属性和 DataMember
属性在每个可序列化的属性上。
我已经应用了这些属性,但是,我仍然看到错误。
出现错误的代码是:
[ResponseType(typeof(PortalUser))]
public HttpResponseMessage Get([FromUri]int userId)
{
var user = Request.CreateResponse(repository.GetById(userId));
if (user != null)
return Request.CreateResponse(user);
return Request.CreateErrorResponse(HttpStatusCode.NotFound, "Not found");
}
其中 PortalUser 定义为:
[Serializable]
[DataContract]
public class PortalUser : IUser<string>
{
public PortalUser() { }
[DataMember]
public string Id { get; set; }
[DataMember]
public string EmailAddress { get; set; }
[DataMember]
public string MobileTelephone { get; set; }
[DataMember]
public string Firstname { get; set; }
[DataMember]
public string Surname { get; set; }
[DataMember]
public string Company { get; set; }
[DataMember]
public string HashedPassword { get; set; }
[DataMember]
public string PasswordSalt { get; set; }
[DataMember]
public byte[] AuthenticatorQrCodeImage { get; set; }
[DataMember]
public string AuthenticatorFallbackCode { get; set; }
[DataMember]
public int FailedLoginCount { get; set; }
[DataMember]
public DateTime LastFailedLoginAttempt { get; set; }
[DataMember]
public string ManagerId { get; set; }
[DataMember]
public string UserName { get { return EmailAddress; } set { EmailAddress = value; } }
[DataMember]
public string TwoFactorAuthenticationSecretKey { get; set; }
}
如您所见,我已经尝试添加错误中建议的属性(下面的错误 1)。我还尝试删除 XmlMediaFormatter
,然后它开始抛出有关无法访问流上的 ReadTimeout
的错误(下面的错误 2)。
错误1:
Type 'System.Net.Http.ObjectContent`1[PolicyService.Common.Models.PortalUser]' cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. If the type is a collection, consider marking it with the CollectionDataContractAttribute. See the Microsoft .NET Framework documentation for other supported types.
错误2:
"Message":"An error has occurred.","ExceptionMessage":"Error getting value from 'ReadTimeout' on 'Microsoft.Owin.Host.SystemWeb.CallStreams.InputStream'.","ExceptionType":"Newtonsoft.Json.JsonSerializationException","StackTrace":" at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues(JsonWriter writer, Object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, JsonContract& memberContract, Object& memberValue)\r\n at ...
我见过类似错误消息的实例,但是,听起来大多数错误消息都是通过添加 DataContract
属性解决的,但这在这里没有帮助。
还有其他人看到过这个吗?或者有人可以帮助阐明这个问题吗?
最佳答案
看起来您的问题可能是您正在从响应中创建响应...您创建了一个响应,然后如果不为空,则尝试使用原始响应创建另一个响应。所以,我想它正在尝试序列化原始响应,而不是你的对象。
关于c# - ASP.NET WebAPI 序列化问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50723883/