asp.net中通过委托、事件在子窗口和父窗口间传值

public delegate void LoginSuccessedDelegate(object sender, LoginSuccessedEventArgs e);
public event LoginSuccessedDelegate LoginSuccessedEvent;

private void LoginButton_Click(object sender, RoutedEventArgs e)
{
this.Close();
LoginSuccessedEventArgs loginAccount = new LoginSuccessedEventArgs();
loginAccount.Account = "123"+DateTime.Now.Second.ToString();
LoginSuccessedEvent(sender,loginAccount);
}
//定义传值数据类型
public class LoginSuccessedEventArgs : EventArgs
{
public string Account{get;set;}
}

private void Login_Click(object sender, RoutedEventArgs e)
{
AccountWindow accountWindow = new AccountWindow(this);

  //注册事件
accountWindow.LoginSuccessedEvent += new AccountWindow.LoginSuccessedDelegate(accountWindow_LoginSuccessedEvent);
accountWindow.ShowDialog();
}

void accountWindow_LoginSuccessedEvent(object sender, AccountWindow.LoginSuccessedEventArgs e)
{
UserInfo.Content ="当前帐号:"+ e.Account;
}