在.NET中利用委托实现窗体间通信

MainFrm.cs: public partial class MainFrm: Form{　private void MainFrm _Load(object sender, EventArgs e)　{　　Middle.sendEvent += new Middle.SendMessage(this.DoMethod);　}　public void DoMethod(string getstr)　{　　listBox1.Items.Add(getstr);　}}ChildFrm.cs:public partial class ChildFrm: Form{　public ChildFrm ()　{　　InitializeComponent();　} 　private void button1_Click(object sender, EventArgs e)　{　　Middle.DoSendMessage(this.textBox1.Text);　　textBox1.Text = "";　　textBox1.Focus();　}}Middle.cs：public static class Middle{　public delegate void SendMessage(string str);　public static event SendMessage sendEvent;　public static void DoSendMessage(string str)　{　　sendEvent(str);　}} 　　同样我们修改一下Program.cs的代码： static class Program{　[STAThread]　static void Main()　{　　Application.EnableVisualStyles();　　Application.SetCompatibleTextRenderingDefault(false);　　// Application.Run(new Form1());　　Form1 mainFrm = new Form1();　　childFrm secondFrm = new childFrm();　　secondFrm.Show();　　Application.Run(mainFrm);　}}