Question

winform下怎样判断一个窗体第一次load

Answer 1

public partial class Form2 : Form
    {
        public static object Flag { get; set; }

        public Form2()
        {
            InitializeComponent();
            Load += Form2_Load;
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            if (Flag == null)
            {
                Flag = "load";
                MessageBox.Show("load");
            }
        }
    }