Named parameters with params

Question

I have a method for getting values from database.

 public virtual List<TEntity> GetValues(            int? parameter1 = null,            int? parameter2 = null,            int? parameter3 = null,            params Expression<Func<TEntity, object>>[] include)         {             //...         }  

How can I call this function with named parameter to not write all parameters before include? I want to do something like this

var userInfo1 = Unit.UserSrvc.GetValues(include: p => p.Membership, p => p.User); 

But this doesn't seem working? How can I use named parameter with params?

Answer 1

I think the only way is something like:

GetValues(include:    new Expression<Func<TEntity, object>>[] { p => p.Membership, p => p.User }) 

Which is not that great. It would be probably best if you added an overload for that:

public List<Entity> GetValues(params Expression<Func<Entity, object>>[] include) {     return GetValues(null, null, null, include); } 

Then you call your method just like

GetValues(p => p.Membership, p => p.User) 

Answer 2

A params argument works like an array, try this syntax:

var userInfo1 = Unit.UserSrvc.GetValues(include: new Expression<Func<TEntity, object>>[] { p => p.Membership, p => p.User }); 

(Might need some adapting due to the generic parameter, but I think you get the gist of it)