Visual C# - Access instance of object created in one class in another

Question

I apologize in advance with what will probably be a fairly easy/quick answer based on scope, but I\'ve looked everywhere and am surprised to not come up with an answer.

Answer 1

You'll need to declare the Soldier instance in in a higher scope.

One way of doing this would be to declare it inside Form1, then pass it to Form2, and so on.

public class Form1
{
    private Soldier tempSoldier = new Soldier();

    private void button1_Click(object sender, EventArgs e)
    {
        tempSoldier = new Soldier();
        tempSoldier.surname = textbox1.text;
    }

    private void GotoNextStep()
    {
        // pass the existing instance to the next form
        Form2 form2 = new Form2(tempSoldier);

        // display form 2 ...
    }
}

---

Another possibility is to use a singleton variable in a class that all the forms have access to.

public class MyAppManager
{
    private static readonly Soldier _soldier = new Solider();

    public static Soldier SoldierInstance
    {
        get { return _soldier; }
    }
}

private void button1_Click(object sender, EventArgs e)
{
    MyAppManager.SoldierInstnace.surname = textbox1.text;
}

The former approach is ok if there's a distinct sequence to the forms; the latter is better if difference forms could be used at different times or revisited.