在asp.net中为Web用户控件添加属性和事件

1@ Control Language="c#" AutoEventWireup="false" Codebehind="LogInOutControl.ascx.cs" Inherits="ZZ.LogInOutControl" TargetSchema="  _http://schemas.microsoft.com/intellisense/ie5"%_ >

  1---  
  2  
  3我们简单的放了两个Label，两个TextBox，两个Button以及一个Html表。   
  4接下去就是为LogInOutControl.ascx.cs文件添加代码了。   
  5首先定义一个delegate，其中LogInOutEventArgs类是从EventArgs类继承，   
  6public delegate void LogInOutClickHandler(object sender,LogInOutEventArgs e);   
  7---  
  8  
  9我觉得把这个delegate放在LogInOutControl类外面更为合适。   
 10接下去为控件声明了LogInOutClick事件，如下：   
 11public event LogInOutClickHandler LogInOutClick;   
 12---  
 13  
 14另外为了更好的使用属性，加了Language枚举，   
 15private Language language;   
 16---  
 17  
 18当然外部通过public Language Lg {get;set;}属性来访问。目的就是改变或者获取当前控件的显示。   
 19接下去就是定义控件事件触发函数OnLogInOutClick，由按钮单击事件处理函数来完成对用户控件事件的触发。   
 20完整代码如下：   
 21namespace ZZ   
 22{   
 23using System;   
 24using System.Data;   
 25using System.Drawing;   
 26using System.Web;   
 27using System.Web.UI.WebControls;   
 28using System.Web.UI.HtmlControls; 
 29
 30// 定义代理   
 31public delegate void LogInOutClickHandler(object sender,LogInOutEventArgs e);   
 32public class LogInOutControl : System.Web.UI.UserControl   
 33{   
 34protected System.Web.UI.WebControls.Button ButtonLogIn;   
 35protected System.Web.UI.WebControls.TextBox TextBoxUserName;   
 36protected System.Web.UI.WebControls.TextBox TextBoxPassword;   
 37protected System.Web.UI.WebControls.Button ButtonLogOut;   
 38protected System.Web.UI.WebControls.Label LabelUser;   
 39protected System.Web.UI.WebControls.Label LabelPassword;   
 40public event LogInOutClickHandler LogInOutClick;   
 41private Language language;   
 42//方法   
 43public void ChangeLanguage(Language language)   
 44{   
 45this.Lg = language;   
 46}   
 47//属性   
 48public Language Lg   
 49{   
 50set   
 51{   
 52if(value!=this.language)   
 53{   
 54if(value==Language.English)   
 55{   
 56this.LabelUser.Text = "User:";   
 57this.LabelPassword.Text ="Password:";   
 58this.ButtonLogIn.Text = "LogIn";   
 59this.ButtonLogOut.Text = "LogOut";   
 60}   
 61else   
 62{   
 63this.LabelUser.Text = "用户：";   
 64this.LabelPassword.Text ="密码：";   
 65this.ButtonLogIn.Text = "登录";   
 66this.ButtonLogOut.Text = "注销";   
 67}   
 68}   
 69}   
 70}   
 71private void Page_Load(object sender, System.EventArgs e)   
 72{   
 73if(this.LabelUser.Text=="User:")   
 74this.language = Language.English;   
 75else   
 76this.language = Language.Chinese;   
 77}   
 78private void OnLogInOutClick(object sender,LogInOutEventArgs e)   
 79{   
 80if(LogInOutClick!=null)   
 81LogInOutClick(this,e);   
 82}   
 83#region Web 窗体设计器生成的代码   
 84override protected void OnInit(EventArgs e)   
 85{   
 86InitializeComponent();   
 87base.OnInit(e);   
 88}   
 89private void InitializeComponent()   
 90{   
 91this.ButtonLogIn.Click += new System.EventHandler(this.ButtonLogIn_Click);   
 92this.ButtonLogOut.Click += new System.EventHandler(this.ButtonLogOut_Click);   
 93this.Load += new System.EventHandler(this.Page_Load);   
 94}   
 95#endregion   
 96private void ButtonLogIn_Click(object sender, System.EventArgs e)   
 97{   
 98OnLogInOutClick(this,new LogInOutEventArgs(LogInClickType.LongIn,CustomValidate(this.TextBoxUserName.Text,this.TextBoxPassword.Text)));   
 99}   
100private void ButtonLogOut_Click(object sender, System.EventArgs e)   
101{   
102//注销代码省略   
103OnLogInOutClick(this,new LogInOutEventArgs(LogInClickType.LongOut,true));   
104}   
105//验证函数   
106private bool CustomValidate(string userName,string password)   
107{   
108//验证代码省略，假设通过   
109return true;   
110}   
111}   
112}   
113  
114  
115---  
116  
117  
118另外一个文件定义了枚举和参数类：   
119using System;   
120namespace ZZ   
121{   
122public class LogInOutEventArgs : EventArgs   
123{   
124private LogInClickType type;   
125private bool result;   
126  
127public LogInOutEventArgs(LogInClickType type,bool result):base()   
128{   
129this.type = type;   
130this.result = result;   
131}   
132public LogInClickType Type   
133{   
134get{return this.type;}   
135}   
136//操作结果，   
137public bool Result   
138{   
139get{return this.result;}   
140}   
141}   
142//操作类型   
143public enum LogInClickType : int   
144{   
145LongIn,   
146LongOut   
147}   
148//定义语言   
149public enum Language   
150{   
151Chinese,   
152English   
153}   
154}   
155  
156---  
157  
158接下去看看在aspx页面里面使用。   
159新建一个Default.aspx页面，拖一个LogInOutControl用户控件到上面。   
160<%@ Register TagPrefix="uc1" TagName="LogInOutControl" Src="LogInOutControl.ascx" 

1@ Page language="c#" Codebehind="Default.aspx.cs" AutoEventWireup="false" Inherits="ZZ.Default" 

1@ Import Namespace="ZZ" 

 1<html>
 2<head>
 3<title>WebForm1</title>
 4</head>
 5<body>
 6<form id="Form1" method="post" runat="server">
 7<font face="宋体">
 8<uc1:loginoutcontrol id="LogInOutControl1" runat="server">
 9</uc1:loginoutcontrol>
10<asp:label id="LabelMsg" runat="server"></asp:label>
11<asp:dropdownlist autopostback="True" id="DropDownList1" runat="server">
12<asp:listitem selected="True" value="0">中文</asp:listitem>
13<asp:listitem value="1">英文</asp:listitem>
14</asp:dropdownlist></font>
15</form>
16</body>
17</html>