Determine type of inherited class

[Magnus]

i have a class which inherits from a base class

class base1 {
}

class child1 : base1 {
}

how can I determine if child1 is of base1? gettype returns type of child1,
but I need to know the type of the class inherited from, the base class.
Casting will cause an exception if the base class is of the wrong type, I
would like to avoid any exception approach.

I basically would like to know if I can cast the object to one or the other
type. Any ideas?

Thank you.

- Magnus

 

[Alan Pretre]

how can I determine if child1 is of base1? gettype returns type of child1,
but I need to know the type of the class inherited from, the base class.
Casting will cause an exception if the base class is of the wrong type, I
would like to avoid any exception approach.

if (obj is base1) ...

-- Alan

 

[Brian Gideon]

Magnus,

The 'is' and 'as' operators will do just that. The 'is' operator
evaluates to a bool. The 'as' operator returns a reference of the type
specified or null if the object is not of the specified type.

// Example 1
if (myClass is base1)
{
// whatever
}

// Example 2
base1 myBaseClass = myClass as base1;
if (myBaseClass != null)
{
// whatever
}

Brian

 

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

You can use Type.BaseType:

instance.GetType().BaseType

You could also use "is" or "as" if all you want to do is a test