第 3 周作业

public interface IDisposable

{

	void Dispose();

}

public class Component : IDisposable

{

	...

}

public class Control : Component, IDisposable

{

	public string Text{ get; set;}

	public string Tag{ get; set;}

	public ControlCollection Controls { get; }

	

	...

}

public class WinForm : Control

{

}

public class Picture : Control

{

}

public class Button : Control

{

}

public class Frame : Control

{

}

public class Lable : Control

{

}

public class LinkLabel : Label

{

}

public class TextBox : Control

{

}

public class PasswordBox : Control

{

}

public class CheckBox : Control

{

}

static class Program

{

	static void Main()

    {

		...

		Application.Run(new LoginForm());

	}

}

	

public partial class LoginForm : Form

{

	private void InitializeComponent()

	{

		Picture logo = new Picture();

		logo.Tag = "LOGO图片";

		

		Button login = new Button();

		login.Text = "登录";

		login.Tag = "登录";

		

		Button register = new Button();

		register.Text = "注册";

		register.Tag = "注册";

		

		Frame frame = new Frame();

		frame.Text = "Frame1";

		

		Label nameLabel = new Label();

		nameLabel.Text = "用户名";

		nameLabel.Tag = "用户名";

		

		TextBox nameTextBox = new TextBox();

		nameTextBox.Tag = "文本框";

		

		Label passLabel = new Label();

		passLabel.Text = "密码";

		passLabel.Tag = "密码";

		

		PasswordBox passTextBox = new PasswordBox();

		passTextBox.Tag = "密码框";

		

		CheckBox rememberUserName = new CheckBox();

		rememberUserName.Tag = "记住用户名";

		

		LinkLabel forgetPass = new LinkLabel();

		forgetPass.Tag = "忘记密码";

		

		frame.Controls.Add(nameLabel);

		frame.Controls.Add(nameTextBox);

		frame.Controls.Add(passLabel);

		frame.Controls.Add(passTextBox);

		frame.Controls.Add(rememberUserName);

		frame.Controls.Add(forgetPass);

		

		this.Controls.Add(logo);

		this.Controls.Add(login);

		this.Controls.Add(register);

		this.Controls.Add(frame);

		

		this.Tag = "WINDOWS窗口";

	}

	

	private void PrintControls()

	{

		PrintControls(this);

	}

	

	private void PrintControls(Control control)
	{

		Console.WriteLine(string.Format("print {0}({1})", control.GetType().Name, control.Tag));

		// loop child controls

		foreach(Control childControl in control.Controls)

		{

			PrintControls(childControl);

		}

	}	

}