What arguments should be written?

Question

C++ / C#

I'm trying to call a function, but there are not enough arguments. I don't understand what needs to be inserted

Answer 1

The PaintEventArgs object can be obtained from a subscription to the Paint event.
e.Graphics can be taken out of functions, then you don't have to pass anything.
Variable in class:
In constructor:
Function:

void Draw(object sender, PaintEventArgs e)
{
    g = e.Graphics;
}

Answer 2

Pass the same sender and e.

Answer 3

Try using JSON.parse instead of jQuery.parseJson, and also set the second argument to the json_encode function (to get json_encode($errorValidation, true))