如何使這種方法的相反

Question

我怎樣才能直接從一個窗體的值傳遞給另一個？接收者表單將在屏幕上顯示，並將從主表單發送監聽傳遞值。

我知道一個方法來做到這一點與代表和事件，但我不是我想要的。

我需要用相反的方式。以下是我可以做這些代碼行。這樣做只能將Form2傳遞給Form1（主窗體）。我需要這種方法的相反。因此，Form1將成爲發送者Form2將成爲接收者，並在屏幕上顯示時實時傳輸。

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

    private void button1_Click(object sender, EventArgs e) 
    { 
     Form2 f = new Form2(); 
     f.IdentityUpdated += new Form2.IdentityUpdateHandler(Form2_ButtonClicked); 
     f.Show(); 
    } 

    private void Form2_ButtonClicked(object sender, IdentityUpdateEventArgs e) 
    { 
     textBox1.Text = e.FirstName; 
    } 
} 

public partial class Form2 : Form 
{ 
    public delegate void IdentityUpdateHandler(object sender, IdentityUpdateEventArgs e); 
    public event IdentityUpdateHandler IdentityUpdated; 

    public Form2() 
    { 
     InitializeComponent(); 
    } 

    private void Form2_Load(object sender, EventArgs e) 
    { 
     string sFirstName = txtFirstName.Text; 
     IdentityUpdateEventArgs args = new IdentityUpdateEventArgs(sFirstName); 
     IdentityUpdated(this, args); 
    } 
} 

public class IdentityUpdateEventArgs : System.EventArgs 
{ 
    private string mFirstName; 
    public IdentityUpdateEventArgs(string sFirstName) 
    { 
     this.mFirstName = sFirstName; 
    } 

    public string FirstName 
    { 
     get { return mFirstName; } 
    } 
} 

Answer 1

嘗試這種方式

public partial class Form1 : Form 
{ 
    public delegate void IdentityUpdateHandler(object sender, EventArgs e); 
    public event IdentityUpdateHandler IdentityUpdated; 

    public Form1() 
    { 
     InitializeComponent(); 

    } 

    private void button1_Click(object sender, EventArgs e) 
    { 
     Form2 form2 = new Form2(); 
     form2.Show(); 
     IdentityUpdated(this, new EventArgs()); 
    } 
} 

public partial class Form2 : Form 
{ 
    public Form2() 
    { 
     InitializeComponent(); 
     Form1 form1 = (Form1)Application.OpenForms["Form1"]; 
     form1.IdentityUpdated += Form1OnIdentityUpdated; 
    } 

    private void Form1OnIdentityUpdated(object sender, EventArgs eventArgs) 
    { 
     MessageBox.Show("received"); 
    } 
}