Initializing object to handle null query results

Question

I have an object model like this:

public class MyObject{
  public int Prop1{get;set;}
  public int Prop2{get;set;}
}

I use this object in a

Answer 1

Is your database type nullable?

If so, you will need to define in your class:

public int? Prop1 { get; set; }

or convert your database type to an int using Convert.ToInt32(databseField) in your cast.

Answer 2

Two places you could fix:

 public int? Prop1{get;set;}

or

 select new MyObject()
            {
              Prop1 = // check for null here and put default value.

Answer 3

Why not use Nullable<int> then?

public class MyObject{
  public int? Prop1{get;set;}
  public int? Prop2{get;set;}
}

int? is a shorthand of Nullable<int>. That means, now Prop1 and Prop2 both can be null.

Or if you want zero, instead of null, then do this in the LINQ :

select new MyObject() { Prop1  = p1 ?? 0,  Prop2 = p2 ?? 0 }

Answer 4

You could do this way:

select new MyObject()
            {
              Prop1 = prop1 ?? 0;
              Prop2 = prop2 ?? 0;
            };

But it is better to use nullables.