Vs.net 2005控件（Web Controls）小例----值外传
Default.apsx 前台代码：
<%@ Register TagPrefix="uc1" TagName="LogInOutControl" Src="LogInOutControl.ascx" %><%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>Untitled Page</title></head><body> <form id="form1" runat="server"> <div> <FONT face="宋体"> <uc1:LogInOutControl id="LogInOutControl1" runat="server"> </uc1:LogInOutControl> <asp:Label id="LabelMsg" runat="server"></asp:Label> <asp:DropDownList id="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"> <asp:ListItem Value="0" Selected="True">中文</asp:ListItem> <asp:ListItem Value="1">英文</asp:ListItem> </asp:DropDownList></FONT> </div> </form></body></html>后台代码：
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
this.LogInOutControl1.LogInOutClick += new LogInOutClickHandler(LogInOutControl1_LogInOutClick);
} private void LogInOutControl1_LogInOutClick(object sender, LogInOutEventArgs e) { switch (e.Type) { case LogInClickType.LongIn: this.LabelMsg.Text = e.UserName + "你点击了登录按钮，操作结果：" + e.Result.ToString(); break; case LogInClickType.LongOut: this.LabelMsg.Text = "你点击了注销按钮，操作结果：" + e.Result.ToString(); break; } } protected void DropDownList1_SelectedIndexChanged(object sender, System.EventArgs e) { this.LogInOutControl1.Lg = (Language)this.DropDownList1.SelectedIndex; }
}
控件前台代码：
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="LogInOutControl.ascx.cs" Inherits="LogInOutControl" %><TABLE id="Table1" style="FONT-SIZE: 9pt; WIDTH: 183px; HEIGHT: 125px" cellSpacing="1" cellPadding="1" width="183" align="center" border="1"> <TR> <TD height="20"> <asp:Label id="LabelUser" runat="server">用户：</asp:Label> <asp:TextBox id="TextBoxUserName" Width="128px" runat="server"></asp:TextBox></TD> </TR> <TR> <TD height="20"><FONT face="宋体"> <asp:Label id="LabelPassword" runat="server">密码：</asp:Label> <asp:TextBox id="TextBoxPassword" Width="128px" runat="server" TextMode="Password"></asp:TextBox></FONT></TD> </TR> <TR> <TD align="center" height="20"><FONT face="宋体"> <asp:Button id="ButtonLogIn" Width="50px" Text="登录" runat="server" OnClick="ButtonLogIn_Click"></asp:Button> <asp:Button id="ButtonLogOut" Width="49px" Text="注销" runat="server" OnClick="ButtonLogOut_Click"></asp:Button></FONT></TD> </TR></TABLE>控件后台代码：
using System;using System.Data;using System.Configuration;using System.Collections;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;public delegate void LogInOutClickHandler(object sender, LogInOutEventArgs e);public partial class LogInOutControl : System.Web.UI.UserControl{ public event LogInOutClickHandler LogInOutClick; private Language language; public void ChangeLanguage(Language language) { this.Lg = language; } public Language Lg { set { if (value != this.language) { if (value == Language.English) { this.LabelUser.Text = "User:"; this.LabelPassword.Text = "Password:"; this.ButtonLogIn.Text = "LogIn"; this.ButtonLogOut.Text = "LogOut"; } else { this.LabelUser.Text = "用户："; this.LabelPassword.Text = "密码："; this.ButtonLogIn.Text = "登录"; this.ButtonLogOut.Text = "注销"; } } } } protected void Page_Load(object sender, EventArgs e) { if (this.LabelUser.Text == "User:") this.language = Language.English; else this.language = Language.Chinese; } private void OnLogInOutClick(object sender, LogInOutEventArgs e) { e.UserName = this.TextBoxUserName.Text; if (LogInOutClick != null) LogInOutClick(this, e); } protected void ButtonLogIn_Click(object sender, EventArgs e) { OnLogInOutClick(this, new LogInOutEventArgs(LogInClickType.LongIn, CustomValidate(this.TextBoxUserName.Text, this.TextBoxPassword.Text))); } private bool CustomValidate(string p, string p_2) { return true; } protected void ButtonLogOut_Click(object sender, EventArgs e) { OnLogInOutClick(this, new LogInOutEventArgs(LogInClickType.LongOut, true)); }}用于控件和主页面之间传值用的类
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;/// <summary>/// Summary description for LogInOutEventArgs/// </summary>public class LogInOutEventArgs : EventArgs{ private LogInClickType type; private bool result; private string userName; public LogInOutEventArgs(LogInClickType type,bool result):base() { this.type = type; this.result = result; } public LogInClickType Type { get { return this.type; } } public bool Result { get { return this.result; } } public string UserName { get { return userName; } set { userName = value; } }}public enum LogInClickType : int{ LongIn, LongOut}public enum Language{ Chinese, English}
