[英]PutAsJsonAsync does not work when dto has data annotations
我看到HttpClient和Web API與我的DTO有一些奇怪的行為。 當我為我的屬性准備好數據注釋時,HttpClient.PutAsJsonAsync()不起作用。 我無法在Web API端收到任何內容。 一些代碼解釋:
我的MVC 4網頁使用以下代碼調用Web API:
using (var client = new HttpClient())
{
var response = client.PutAsJsonAsync(uri+"/"+MyObject.Id, MyObject).Result;
response.EnsureSuccessStatusCode(); // Returns 500 when i use MyObject with annotations
}
要接收的Web API控制器代碼。 請注意,當MyObject具有注釋時,甚至不會觸發此操作:
public MyObject Put(MyObject myObject)
{
try
{
if (myObject == null) throw new NullReferenceException();
}
catch (Exception e)
{
throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.BadRequest));
}
}
MyObject DTO工作時:
public class MyObject
{
public int Id { get; set; }
public Nullable<int> AuditProgramId { get; set; }
public string Title { get; set; }
public System.DateTime StartDate { get; set; }
public System.DateTime EndDate { get; set; }
}
MyObject DTO不起作用時:
public class MyObject
{
public int Id { get; set; }
public Nullable<int> AuditProgramId { get; set; }
[Required]
public string Title { get; set; }
[Required, DataType(DataType.Date)]
public System.DateTime StartDate { get; set; }
[Required, DataType(DataType.Date)]
public System.DateTime EndDate { get; set; }
}
有任何想法嗎?
更新1
它可以在沒有注釋的情況下使用這些值,但是注釋失敗:
var myObj = new MyObject {
Id=4,
Title="Test Title",
StartDate=DateTime.Today,
EndDate=DateTime.Today.AddDays(2)
};
我可以重新編寫您的方案,並且異常消息實際上提供了此問題的解決方案:
Property 'StartDate' on type 'MvcApplication.Model.MyObject' is invalid. Value-typed properties marked as [Required] must also be marked with [DataMember(IsRequired=true)] to be recognized as required. Consider attributing the declaring type with [DataContract] and the property with [DataMember(IsRequired=true)].
我相應地修改了我的MyObject
類,讓你的場景工作。
[DataContract]
public class MyObject
{
[DataMember]
public int Id { get; set; }
[DataMember]
public Nullable<int> AuditProgramId { get; set; }
[DataMember]
[Required]
public string Title { get; set; }
[Required, DataType(DataType.Date)]
[DataMember(IsRequired = true)]
public System.DateTime StartDate { get; set; }
[Required, DataType(DataType.Date)]
[DataMember(IsRequired = true)]
public System.DateTime EndDate { get; set; }
}
僅供參考,最近修復了與此場景相關的錯誤,以簡化操作: 將[DataMember(IsRequired = true)]應用於具有值類型的必需屬性的過於激進的驗證
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