不能在泛型类型或方法中用作类型参数“TElement”

Question

I am using Entity Model, C#, .NET Framework 3.5. I have generated entity classes from POCO , but it had issues on ObjectSet and CreateObjectSet which I fixed by replacing them with ObjectQuery and CreateQuery.

But I still have one issue in following code in EntityGenerator.Context.cs ,

The code is

public ObjectResult<lead> GetLeads()
        {
            **return base.ExecuteFunction<lead>("GetLeads");**
        }

And the error is

Proj.EntityModel.employee cannot be used as type parameter 'TElement' in the generic type or method 'System.Data.Objects.ObjectContext.ExecuteFunction(string, params System.Data.Objects.ObjectParameter[])'. There is no implicit reference conversion from 'Proj.EntityModel.employee' to 'System.Data.Objects.DataClasses.IEntityWithChangeTracker'.

What's this error? What's solution?

Answer 1

It sounds like you just need to make employee implement IEntityWithChangeTracker .

(I suspect you've cut and paste the wrong section of code though, given that the error talks about employee and your code talks about lead . I'd also encourage you to change your names so that they follow .NET naming conventions.)