how to call parent's Start() method from child in C#?

This should be simple, but I can't find documentation for it. I'm trying to call the parent class' Start method from the child's Start method.

Code (csharp):

1. public class BlahChild : Blah {
2.   void Start() {
3.     parent.Start()
4.     // other stuff
5.   }
6. }
7.  

What's the correct syntax for doing this?

Thanks

 

How about base.Start()?

 

Thanks, that's what I was looking for.

 

How would a grandchild execute it's parent's Start though? (i.e. not base class)???

Cheers

 

You can't. You can only execute the parent's Start. However, if the parent doesn't have a Start(), it inherits it from the grandparent, and that one will be called instead.

If the parent has a Start(), you cannot skip over it and run the grandparent's instead.

 

!!!!
But in most OOP you have super/parent/top or something.
So if I have class A

and B inherits from A

and C inherits from B

then B can do base.start() //which will execute A.start();
C can do base.start() //which will execute A.start();

But 'C' can't execute B.start()?????

Cheers

 

Correct. You can chain constructors but not methods.

 

Gulp!
So is this a Unity restriction or a c# in general ??

Cheers

 

thats a general thing

 

Thanks!!

 

its not restricted just make shure your methods are public and all the stuff you want to access directly from child example : parent has :
public void MyMethod(){

}
child now sees :
MyMethod();

so is all there

 

Code (CSharp):

1. class C:B
2. {
3.  
4.    protected new void Start()
5.    {
6.       base.Start();
7.       Debug.Log("C Start");
8.    }
9. }
10.  
11. class B:A
12. {
13.    protected new void Start()
14.    {
15.       base.Start();
16.       Debug.Log("B Start");
17.    }
18. }
19.  
20. class A:Monobehaviour
21. {
22.    protected virtual void Start()
23.    {
24.       Debug.Log("A Start");
25.    }
26. }

otuput:
"A Start"
"B Start"
"C Start"

Please , can I ask for someone to explain why does it works ?

 

Why wouldn't it?

line 6 calls the method on line 13. Line 15 calls the method on line 22.

 

You call C.Start().

The first thing that C.Start() is call its base version, and since C inherits from B, that's B.Start(). B.Start() respectively calls A.Start().

A.Start() does its output, then the program returns to B.Start (), which does its output, before returning to C.Start().

 

What @benqowny is showing isn't method overriding because he's declaring each derivative Start method as new.

 

That's correct. However he's calling

base.Start()

which will call the new Start method of the immediate parent class because that is the method with the most imminent(?) scope.

 

transform.root.GetComponent<rootScript>().Start();

Just change rootScript to the name of the script attached to the base object that you want to call Start() or whatever else on.