網站用戶登錄、註冊和修改密碼常用代碼，採用三層架構

創建用戶表的Sql語句，數據庫爲SQL Server2000：

create table "User" ( UserID int not null, UserName varchar(50) null, UserPwd varchar(50) null, UserCode varchar(50) null, UserRole varchar(50) null, CreatTime datetime null default getdate(), UpdateTime datetime null default getdate(), Define1 varchar(50) null, Define2 varchar(50) null, constraint PK_USER primary key nonclustered (UserID) ) go

1.用戶登錄功能的實現:

已經使用LiTianPing的動軟代碼生成器生成了三層架構，以下是添加的代碼。

(1)DAL層的User.cs中添加兩個方法：

/// <summary> /// 用戶登錄 /// </summary> /// <param name="userName"></param> /// <param name="password"></param> /// <returns></returns> public HJMS.Model.User CheckUser(string userName,string password) { HJMS.Model.User userInfo=new Model.User(); int num = 0;string str = ""; StringBuilder strSql = new StringBuilder(); strSql.Append(" select top 1 UserID,UserName,UserPwd from User"); strSql.Append(" where UserName=@UserName"); SqlParameter[] pt = {new SqlParameter("@UserName", SqlDbType.VarChar),}; pt[0].Value = userName.ToLower(); using(SqlDataReader reader=DbHelperSQL.ExecuteReader(strSql.ToString(),pt)) { if(reader.Read()) { num = reader.GetInt32(0); str = reader[2].ToString(); } } if(num!=0) { if(str==password) { userInfo.UserPwd = password; StringBuilder strSql2 = new StringBuilder(); strSql.Append(" select top 1 UserID,UserName,UserPwd,UserCode,UserRole,CreatTime,UpdateTime,Define1,Define2 from User"); strSql.Append(" where UserID=@UserID"); SqlParameter[] parameters2 = {new SqlParameter("@PerID", SqlDbType.Int,4)}; parameters2[0].Value = num; using (SqlDataReader reader2 = DbHelperSQL.ExecuteReader(strSql2.ToString(), parameters2)) { if (reader2.Read()) { userInfo.UserID = reader2[0] == null ? 0 : reader2.GetInt32(0); userInfo.UserName = reader2[1].ToString(); userInfo.UserCode = reader2[3].ToString(); userInfo.UserRole = reader2[4].ToString(); userInfo.CreatTime = reader2.GetDateTime(5); userInfo.UpdateTime = reader2.GetDateTime(6); userInfo.Define1 = reader2[7].ToString(); userInfo.Define2 = reader2[8].ToString(); } } } } return userInfo; } /// <summary> /// 根據用戶名獲得用戶實體 /// </summary> /// <param name="userName"></param> /// <returns></returns> public HJMS.Model.User GetModelByUserName(string userName) { StringBuilder strSql = new StringBuilder(); strSql.Append(" select top 1 UserID,UserName,UserPwd,UserCode,UserRole,CreatTime,UpdateTime,Define1,Define2 from User"); strSql.Append(" where UserName=@UserName"); SqlParameter[] pt = {new SqlParameter("@UserName", SqlDbType.VarChar)}; pt[0].Value = userName; HJMS.Model.User user = new Model.User(); DataTable dtUser = DbHelperSQL.Query(strSql.ToString(), pt).Tables[0]; if (dtUser.Rows.Count > 0) { if (dtUser.Rows[0]["UserID"].ToString() != "") { user.UserID = int.Parse(dtUser.Rows[0]["UserID"].ToString()); } user.UserName = dtUser.Rows[0]["UserName"].ToString(); user.UserPwd = dtUser.Rows[0]["UserPwd"].ToString(); user.UserCode = dtUser.Rows[0]["UserCode"].ToString(); user.UserRole = dtUser.Rows[0]["UserRole"].ToString(); user.CreatTime = Convert.ToDateTime(dtUser.Rows[0]["CreateTime"]); user.UpdateTime = Convert.ToDateTime(dtUser.Rows[0]["UpdateTime"]); user.Define1 = dtUser.Rows[0]["Define1"].ToString(); user.Define2 = dtUser.Rows[0]["Define2"].ToString(); return user; } else { return null; } }

(2) BLL層的User.cs中添加兩個方法：

/// <summary> /// 用戶登錄 /// </summary> /// <param name="userName"></param> /// <param name="password"></param> /// <returns></returns> public HJMS.Model.User CheckUser(string userName, string password) { return dal.CheckUser(userName, password); } /// <summary> /// 根據用戶名獲得用戶實體 /// </summary> /// <param name="userName"></param> /// <returns></returns> public HJMS.Model.User GetModelByUserName(string userName) { return dal.GetModelByUserName(userName); }

(3)UI層就是用戶界面，假設Login.aspx如下的話：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %> <!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>系統登錄</title> <mce:script language="javascript"></mce:script> </head> <body οnlοad="SetFocus()" style="background-color: White;" mce_style="background-color: White;"> <form id="form1" runat="server"> <table cellspacing="0" cellpadding="3" border="0" align="center" width="530px" style="margin-top: 200px;" mce_style="margin-top: 200px;"> <tr> <td style="width: 525px; height: 310px; background: url(images/background/loginbackground2.jpg) no-repeat; vertical-align: top;"> <div style="text-align: right; margin-right: 20px;" mce_style="text-align: right; margin-right: 20px;"> <div style=" text-align: left;width: 218px; height: 19px; margin-top:15px; margin-right:20px"> <asp:Label ID="lblTitle" runat="server" Text="戶籍管理系統" Font-Bold="true" Font-Size="Small" Font-Names="宋體"></asp:Label> </div></div> <div id="userloginbox" style="margin: 0px 30px;" mce_style="margin: 0px 30px;"> <table cellpadding="5px;" width="450px"> <tr> <td colspan="2"> </td> </tr> <tr> <td align="right" width="50%"> <asp:Label ID="Label2" runat="server">用戶名：</asp:Label> </td> <td> <asp:TextBox ID="txtUserID" runat="server" Width="150px" MaxLength="10" class="username" EnableTheming="false"></asp:TextBox> </td> </tr> <tr> <td align="right"> <asp:Label ID="Label3" runat="server">密碼：</asp:Label> </td> <td> <asp:TextBox ID="txtPwd" runat="server" TextMode="Password" Width="150px" MaxLength="20" class="password" EnableTheming="false"></asp:TextBox> </td> </tr> <tr> <td> </td> <td> <asp:Button ID="btnLogin" runat="server" Text="登錄" OnClick="btnLogin_Click"></asp:Button> </td> </tr> <tr> <td colspan="2" style="height: 20px;"> <asp:Label ID="lblMessage" runat="server" EnableViewState="False"></asp:Label> </td> </tr> <tr> <td colspan="2" align="right"> IE (<asp:Label ID="lblVersion" runat="server" Text="版本 6.0"></asp:Label>) </td> </tr> </table> </div> </td> </tr> </table> <br /> <br /> </form> </body> </html>

那麼Login.aspx.cs頁面就可以這樣：

public partial class Login : System.Web.UI.Page { private HJMS.BLL.User userBll = new HJMS.BLL.User(); protected void Page_Load(object sender, EventArgs e) { } protected void btnLogin_Click(object sender, EventArgs e) { HJMS.Model.User UserInfo = userBll.CheckUser(txtUserID.Text.Trim(), txtPwd.Text.Trim()); if(UserInfo!=null&&UserInfo.UserID!=0) { HttpCookie cookie = FormsAuthentication.GetAuthCookie(UserInfo.UserName, true); cookie.Expires = DateTime.Now.AddDays(7); Response.Cookies.Add(cookie); if(Request.QueryString["ReturnUrl"]!=null) { Context.Response.Redirect(Request.QueryString["ReturnUrl"]);// 重定向到用戶申請的初始頁面 } else { Response.Redirect("Admin/Navigator.aspx"); } } else { Page.ClientScript.RegisterStartupScript(Page.GetType(),"Fails","alert('用戶名或密碼錯誤!');",true); } } }

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網站用戶登錄、註冊和修改密碼常用代碼，採用三層架構

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