点击button1弹出form2，并在form2中点击button2来调用form1的方法

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1.     private void button1_Click(object sender, EventArgs e)

        {

            Form2 f2 = new Form2();

            f2.f1 = this;//把当前的Form1给form2中的form1对象

            f2.Show();

 

        }

 

2.

 　 public partial class Form2 : Form

    {

        public Form1 f1 = new Form1();

        public Form2()

        {

            InitializeComponent();

        }

 

        private void Form2_Load(object sender, EventArgs e)

        {

 

        }

 

        private void button1_Click(object sender, EventArgs e)

        {

            f1.addname(textBox1.Text.Trim());

        }

    }