CODEWITHSUNDEEP
c#linqwcfserialization
user44811
user44811

Reputation:

How to Serialize System.Linq.Expressions?

I am working on WinRT and entity framework (to SQL), the layer that communicates between them is WCF Service.

In the entity framework I am using the Repository Pattern and I have the method:

    public IQueryable<User> GetBySearch(Expression<Func<User, bool>> search)
    {
        return this.Context.Users.Where(search);
    }

Everything works fine, but when I add it to WCF

    [OperationContract]
    IQueryable<User> GetEventBySearch(Expression<Func<User, bool>> search);

and:

    public IQueryable<User> GetEventBySearch(Expression<Func<User, bool>> search)
    {
        IUser user = new UserRepository();
        return user.GetBySearch(search);
    }

But the problem that Expression<TDelegate> is not serializable, therefore, WCF can't serialize it.

So I thought to inherit from it and make it [Serializable] but the problem that it is a sealed class.

Upvotes: 0

Views: 637

Answers (1)

Rene Niediek
Rene Niediek

Reputation: 147

This doesn't make sence at all. In fact you try to execute a func in the code of WinRT client on the WCF service. How shoud that work? I think you have to define your own query language that is translated to a expression on the service.

Upvotes: 1

Related Questions