Question

i’ve often had this issue where i do not really understand how to pass userform variables into classes. for example i have a button:

private void button1_Click(object sender, EventArgs e)
{
    DoStuff();
}

and a method in the form class:

DoStuff()
{

    Class123 myclass = new Class123();

}


...
...

class Class123
{

    //how do i pass for example in myotherClass whether or not my checkbox on the userform is checked? i dont want to have to pass from method to method to class to class. what is the logical/smart way of handling this?
    ClassData myotherClass = new ClassData();
}

how do i pass for example in myotherClass whether or not my checkbox on the userform is checked? i dont want to have to pass from method to method to class to class. what is the logical/smart way of handling this?

Answer 1

I disagree with this approach.
Any ‘smart’ method, if it even exist, will break the golden rules of Object Oriented Programming.
An object is a self contained item of data that can only be accessed or changed in a controlled way. This prevents side effects, a common problem in procedural code, where data is globally accessible. In OOP, the objects can receive or send messages to other objects only by calling their methods.

EDIT: To show a way to do it

public static class MyApp
{
    public static bool MyCheckBox {get; set;}
}

in your doStuff

MyApp.MyCheckBox = this.checkBox1.Checked;

inside a method of your myOtherClass

   if(MyApp.MyCheckBox == true)
   ...

this is the same as using a global variable in the old days of procedural languages. This paves the way to difficult to track bugs and creates state mode that render an application hard to maintain