窗体传值

using System;
using System.Collections.Generic;
using System.Text;

namespace passValueForm
{
    class Middle
    {
        public delegate void SendMessage(string str);
        public static event SendMessage sendEvent;
        public static void DoSendMessage(string str) {
            sendEvent(str);
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace passValueForm
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Middle.sendEvent += new Middle.SendMessage(DoMethod);
        }
        public void DoMethod(string getstr)
        {
            this.textBox1.Text = getstr;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form2 f = new Form2();
            f.Show();
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace passValueForm
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Middle.DoSendMessage(this.textBox1.Text);
        }
    }
}