Question

I’ve a class:

public class A
{
   public string field1 {get;set;}
   public string field2 {get;set;}
}

I want to check if at least one property is not null.

How to do this?
Thanks.

Answer 1

Reflection can help you:

A myInstance = new A();
Type myType = myInstance.GetType();
if (myType.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | 
                            BindingFlags.Static | BindingFlags.Instance)
   .Any(property => propoerty.CanRead && property.GetValue(myInstance, null) != null)) 
{ /* something is not null in myInstance */}

Doesn’t matter how many properties your class have.

Note: as comments pointed out, this won’t check non-public and set-only properties would blow it up. Code has been tweaked.