CODEWITHSUNDEEP
c#jsonrestwcfobject
Denis Stephanov
Denis Stephanov

Reputation: 5281

Conditional result type in WCF

Is possible returning 2 different types addicted on condition?

for example:

[OperationContract]
[WebInvoke(
    Method = "GET",
    UriTemplate = "/GetMyResult",
    RequestFormat = WebMessageFormat.Json,
    ResponseFormat = WebMessageFormat.Json
    )]
object GetMyResult(int x);

and function declaration:

public object GetMyResult(string x)
{
    if (x)
      return new UserEntity () {...} // some object with properties
    else
      return new MessageErr() {...} // object with 2 properties Text and error code
}

This code do not work for me. Is some good practice how can I do that ? Thanks

Upvotes: 0

Views: 63

Answers (1)

Mairaj Ahmad
Mairaj Ahmad

Reputation: 14624

No you can't return object in WCF because service is meant to clearly describe what it needs and what it will return.

But there is another way by which you can do this which i have implemented in my project which is similar as your needs.

You can make a class with a property where you will send the object.

public class CustomResponse
{
  public CustomData Data { get; set; }
}

[KnownType(typeof(UserEntity))]
[KnownType(typeof(MessageErr))]
[DataContract]
public class CustomData
{
  [DataMember]
  public object Data { get; set; }

  public CustomData(object obj) 
  {
     this.Data = obj;
  }
}

And here is how you will call it

CustomResponse Response = new CustomResponse();
UserEntity obj = new UserEntity();
Response.Data = new CustomData(obj);

Upvotes: 1

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