Question

I have a class with some constructors,a form with a command button and 1 public variable set to 20 at my “form.cs”. How can i decrement the variable every time i click on the button until it becomes zero? I tried a few methods such as a loop inside the click event, a simple deduction in the constructor(variable = variable -1) but they dont work!
Tried this:

public void AssignSeat()
{
   seats = seats - 1;    
}

and then

private void button2_Click(object sender, EventArgs e)
{
    Class1 Class1 = new Class1();
    Class1.AssignSeat();
    Class1.MSGbox();                     
}

It compiles and runs w/o errors but it never stops!

Answer 1

1. Are both the methods in the same class if yes, then you don’t need to create an object for Class1 to access it.
2. Is the variable set as 20 every time you click on the button.
3. According to what you have written you are creating a new instance every time, So your issue arises.

Declare iCount & iTemp outside button click

int iCount = 0;
int iTemp = 20;

    private void button2_Click(object sender, EventArgs e)
    {
        if (iCount == 0)
        {
            iTemp = 20;
            iCount++;
        }
        iTemp = iTemp - 1;
        MessageBox.Show(iTemp.ToString());
    }
}