CODEWITHSUNDEEP
c#
user1271127
user1271127

Reputation: 97

return var-type variable

I has some method, for example:

    public VAR GetAllPosts()
    {
        var post = from p in _db.Posts  select p;
        return post;
    }

How return var-type variable?

Upvotes: 2

Views: 1825

Answers (3)

hjgraca
hjgraca

Reputation: 1714

Based on your code, you know it's going to be a enumeration of Posts, so return

public IEnumerable<Posts> GetAllPosts()
    {
        var post = from p in _db.Posts  select p;
        return post;
    }

or

public IEnumerable<Posts> GetAllPosts()
    {
        return from p in _db.Posts  select p;
    }

If you want to go hardcore you could use something like this, this is a generic type of T, you have to call the method with the desired type and inside it validate the type and do what you like.

  public List<T> GetData<T>()
  {
      //Validate the type and do something
      if (typeof(T) == typeof(MyClass))
      {
         List<MyClass> lst = new List<MyClass>();
         lst.Add(new MyClass { ClassProperty = "Value" });

         return lst as List<T>;
     }
     else // do something else
     {
       return null;
     }
   }

To call this method you pass the correct type

List<MyClass> list = GetData<MyClass>();

Hope it helps.

Upvotes: 6

Tigran
Tigran

Reputation: 62248

var is not a type, so can not be returned.

If you are uncertain about return type, return object (like Daniel suggests), if it can be more then one type, return thier base type, if any.

In your concrete case, seems, that you are trying to return IEnumerable<T> of the objects in _db.Posts

Upvotes: 5

Daniel A. White
Daniel A. White

Reputation: 190897

You can have it object, however you still will have to cast it to use it appropriately. dynamic is another option, but might be more trouble than its worth.

I think what you might want is IQueryable<T> where T is the type of Posts.

Upvotes: 9

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