Add attributes and events for web user controls in ASP.NET

We put two Label, two TextBox, two Button and an HTML table. The next is to add a code for the loginoutcontrol.ascx.cs file. First define a delegate, where the Loginouteventargs class is inherited from Eventargs class, public delegate Void LoginoutClickHandler (Object Sender, Loginouteventargs E); I think this delegate is more appropriate outside the LoginoutControl class. Next, the LoginoutClick event is declared as the control, as follows:

Public Event LoginoutClickHandler LoginoutClick; In addition to better use attributes, add Language enumeration,

Private language language; Of course, the outside is accessed through the Public Language LG {Get; Set;} property. The purpose is to change or get the display of the current control. Next is to define the control event trigger function OnLoginoutClick, and click the event handler to complete the trigger to the user control event. The full code is as follows:

namespace ZZ {using System; using System.Data; using System.Drawing; using System.Web; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; // define a proxy public delegate void LogInOutClickHandler (object sender , LogInOutEventArgs e); public class LogInOutControl: System.Web.UI.UserControl {protected System.Web.UI.WebControls.Button ButtonLogIn; protected System.Web.UI.WebControls.TextBox TextBoxUserName; protected System.Web.UI.WebControls. TextBox TextBoxPassword; protected System.Web.UI.WebControls.Button ButtonLogOut; protected System.Web.UI.WebControls.Label LabelUser; protected System.Web.UI.WebControls.Label LabelPassword; public event LogInOutClickHandler LogInOutClick; private Language language; // Method PUBLIC VOID CHANGELANGUAGE (LANGUAG = Language;} // Property 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 = "User:"; this.labelpassword.text = password: "; this.buttonlogin.text = "Login"; this.ButtonLogout.Text = "Logout";}}}} private void page_load (object sender, system.eventargs e) {if (this.labeluser.text == "User:" This.language = Language.english; else this.language = language.Chinese;} private void onlineinoutclick (object sender, loginouteventargs e) {if (loginoutclick! = Null) LoginoutClick (this, e);

} #Region Web Form Designer generated code override protected void OnInit (EventArgs e) {InitializeComponent (); base.OnInit (e);} private void InitializeComponent () {this.ButtonLogIn.Click = new System.EventHandler ( this.ButtonLogIn_Click); this.ButtonLogOut.Click = new System.EventHandler (this.ButtonLogOut_Click); this.Load = new System.EventHandler (this.Page_Load);} #endregion private void ButtonLogIn_Click (object sender, System.EventArgs e) {OnLogInOutClick (this, new LogInOutEventArgs (LogInClickType.LongIn, CustomValidate (this.TextBoxUserName.Text, this.TextBoxPassword.Text)));} private void ButtonLogOut_Click (object sender, System.EventArgs e) {// Code omitted logout OnLogInOutClick (this, new LogInOutEventArgs (LogInClickType.LongOut, true));} // verification function private bool CustomValidate (string userName, string password) {// the code verification is omitted, it is assumed by the return true;}}} defines another file Enumeration and parameter class:

using System; namespace ZZ {public class LogInOutEventArgs: EventArgs {private LogInClickType type; private bool result; public LogInOutEventArgs (LogInClickType type, bool result): base () {this.type = type; this.result = result;} public LogInClickType Type {Get {return this.type;}} // operation result, public bool result {get {return this.result;}}} // Operating type public enum LoginclickType: int {longin, longout} // definition language public enum language {Chinese, English}} Take a look at it in the ASPX page. Create a New Default.aspx page, drag a loginoutcontrol user control to top.

<% @ Register TagPrefix = "uc1" TagName = "LogInOutControl" Src = "LogInOutControl.ascx"%> <% @ Page language = "c #" Codebehind = "Default.aspx.cs" AutoEventWireup = "false" Inherits = "ZZ .Default "%> <% @ import namespace =" zz "%>