c# 两个窗体之间的传值

from1:

    private void button1_Click(object sender, EventArgs e)
        {
            Form2 f2 = new Form2();
            f2.ShowDialog(this);
        }

将窗体1的文本框设为public

 

 

 

from2:

  private void button1_Click(object sender, EventArgs e)
        {
            Form1 f1 = (Form1)this.Owner;
            f1.textBox1.Text = this.textBox1.Text ;
        }