How do I use a variable declared in a method, outside that method?

Question

I am using VS 2008 (C#)... I have created a function in a GlobalClass to use it globally.. This is for opening a dialog box. When I call this function in my method it works but

Answer 1

You might want to rework your method to actually return the filename instead.

Something like

public static string OFDbutton()
{
    OpenFileDialog ofd = new OpenFileDialog();
    ofd.Filter = "Image files|*.jpg;*.jpeg;*.png;*.gif";

    if (ofd.ShowDialog() == DialogResult.OK)
        return ofd.Filename;
    else
        return string.Empty;
}

Of course, this is a very naive approach, and you might want to read up on variable scope and object oriented design in general.

Edit: This answer expands on the issue and improves the design, taking into account that the user may have clicked cancel in the dialog itself.

Edit2: Shamelessly copying from the linked answer, I modify my own snippet.