How to access a variable outside an event handler when it is defined within the event handler in c#?

Question

Below is some of my code in a c# windows forms application.

It assigns a random Integer to handle. How can I access the new value of handle so it can be used by other function calls outside this button event since there is no global variables in c#?

I've tried using a Method but it still wont recognise handle when I call it outside the button event.

Also what would I use to make my GUI that you cannot use some of the other controls until this button is pressed?

  private void button1_Click(object sender, EventArgs e)
    {
      Int handle = 0;
      random(ref handle);
    }

Answer 1

    public class MyClass
    {
            private int handle;

            private void button1_Click(object sender, EventArgs e)
            {
                handle = 0;
            }

            private void button2_Click(object sender, EventArgs e)
            {
                GetHandle();
            }

            private int GetHandle()
            {
                return handle;
            }
    }

Answer 2

I'm assuming I have misunderstood your question, but in case you've missed the obvious. How does this look?

public class MyForm : Form
{
    private int _handle;

    private void button1_Click(object sender, EventArgs e)
    {
        _handle = 0;
    }
}

Answer 3

Two ways.

1. Define a member, use member.
2. Build an event, send that variable out use that event triggered inside this event. This is equal to you calling the function need this variable directly.

Answer 4

You can define a class-level variable and use it to store this value.

public class MyClass
{
    private Int _handle = 0;

    private void incrementHandle()
    {
        _handle++;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        random(ref handle);
    }

    ...
}