WCF displaying the generic type 'T'

Question

I am writing a WCF service for the Insert and Delete operation here we used the general method, but it gives the following error "System.Runtime.Serialization.InvalidDataContractException: type" T "cannot be exported as a schema type because it is an open generic type. You you can only export a generic type if all its generic parameter types are actual types. "

here "EntityBase2" is the base class for all objects

[ServiceContract]
[ServiceKnownType(typeof(EntityBase2))]
public interface IBackupUtility
{
    [OperationContract]
    void Delete<T>(T entity) where T : EntityBase2;

    [OperationContract]
    void InsertORUpdate<T>(T entity) where T : EntityBase2;        
}

The question is, how can I set the generic type 'T'?

Answer 1

I think this is not possible, how can it generate wsdl this way?

You have two options:

• .

• crud , , , T4 EF.

Answer 2

, , , - : WCF Generics

Answer 3

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  [DataContract]
  public class MyGenericObject<T>
  {
     private T _id;
  
     [DataMember]
     public T ID
     {
        get { return _id; }
        set { _id = value; }
     }
  }
  
  [OperationContract]
  MyGenericObject<int> GetGenericObject();
  

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WSDL :

[DataContract]
public class MyGenericObjectOfint

We can see that what we get from WSDL is not a general data contract. A WSDL proxy generates a class with a new name using some kind of convention.

Convention used

Generic Class Name + "Of" + Type Parameter Name + Hash

A hash is not always generated; it is generated only when there is a chance of a name clash.