ASP.NET 2.0服务器控件之复合控件概述

using System;
using System.ComponentModel;
using System.Drawing;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace WebControlLibrary{
[
　DefaultProperty("ButtonText"),
　ToolboxData("＜{0}:Register runat=\"server\"＞ ＜/{0}:Register＞"),
]

public class Register : CompositeControl {
// 定义私有字段
private Button submitButton;
private TextBox nameTextBox;
private Label nameLabel;
private TextBox emailTextBox;
private Label emailLabel;
private RequiredFieldValidator emailValidator;
private RequiredFieldValidator nameValidator;
// 实现属性ButtonText

[
　Bindable(true),
　Category("Appearance"),
　DefaultValue(""),
　Description("按钮上的文字内容.")
]

public string ButtonText {
　get {
　　EnsureChildControls();
　　return submitButton.Text;
　}
　set {
　　EnsureChildControls();
　　submitButton.Text = value;
　}
}

// 实现属性Name

[
　Bindable(true),
　Category("Default"),
　DefaultValue(""),
　Description("用户名.")
]

public string Name {
　get {
　　EnsureChildControls();
　　return nameTextBox.Text;
　}
　set {
　　EnsureChildControls();
　　nameTextBox.Text = value;
　}
}

// 实现属性NameErrorMessage

[
　Bindable(true),
　Category("Appearance"),
　DefaultValue(""),
　Description("用户名验证错误信息.")
]

public string NameErrorMessage {
　get {
　　EnsureChildControls();
　　return n