当dto具有数据注释时,PutAsJsonAsync不起作用
本文关键字:PutAsJsonAsync 不起作用 注释 数据 dto | 更新日期: 2023-09-27 18:12:31
我看到一些奇怪的行为与HttpClient和Web API与我的dto。当我为我的属性准备好数据注释时,HttpClient.PutAsJsonAsync()不起作用。我无法在Web API端接收到任何东西。一些代码来解释:
我的MVC 4 web页面调用web API的代码:
using (var client = new HttpClient())
{
var response = client.PutAsJsonAsync(uri+"/"+MyObject.Id, MyObject).Result;
response.EnsureSuccessStatusCode(); // Returns 500 when i use MyObject with annotations
}
Web API控制器代码接收。注意,当MyObject有注解时,这甚至不会被触发:
public MyObject Put(MyObject myObject)
{
try
{
if (myObject == null) throw new NullReferenceException();
}
catch (Exception e)
{
throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.BadRequest));
}
}
MyObject工作时的DTO:
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不工作时的DTO:
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; }
}
任何想法?
更新1
在没有注释的情况下可以处理这些值,但是有注释就失败了:
var myObj = new MyObject {
Id=4,
Title="Test Title",
StartDate=DateTime.Today,
EndDate=DateTime.Today.AddDays(2)
};
我可以重现您的场景,异常消息实际上提供了这个问题的解决方案:
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)].
我已经修改了我的MyObject
类相应,我得到了你的方案工作。
[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; }
}
仅供参考,最近修复了与此场景相关的错误,以使事情更简单:对值类型