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首先分别新建三个网页,register.aspx,login.aspx, yzm.aspx分别用于用户的注册,登录以及验证码的生成。
register.aspx前台代码:
1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="register.aspx.cs" Inherits="_Default" %> 2 3 <!DOCTYPE html> 4 5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head runat="server"> 7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 8 <title>注册页面</title> 9 <style type ="text/css"> 10 .wrap { 11 padding-top:40px; 12 margin:0 auto; 13 width:760px; 14 height:426px; 15 } 16 .auto-style1 { 17 width: 399px; 18 } 19 </style> 20 </head> 21 <body> 22 <form id="form1" runat="server"> 23 <table> 24 <tr> 25 <td>用户名:</td><td class="auto-style1"><asp:TextBox ID ="txtName" runat ="server" AutoPostBack="true" OnTextChanged ="txtName_TextChanged"></asp:TextBox><asp:Label ID ="labuser" runat ="server"></asp:Label></td> 26 </tr> 27 <tr> 28 <td>密码:</td><td class="auto-style1"><asp:TextBox ID ="txtPass" runat ="server" TextMode ="Password" Width="149px"></asp:TextBox></td> 29 </tr> 30 <tr> 31 <td>重复密码:</td><td class="auto-style1"><asp:TextBox ID ="txtQpass" runat ="server" TextMode ="Password" Width="149px"></asp:TextBox></td> 32 </tr> 33 <tr> 34 <td>昵称:</td><td class="auto-style1"><asp:TextBox ID ="txtNickName" runat ="server"></asp:TextBox></td> 35 </tr> 36 <tr> 37 <td>性别:</td><td class="auto-style1"><asp:RadioButton ID ="radnan" runat ="server" Text ="男" GroupName ="sex" Width ="80px"/><asp:RadioButton ID ="radnv" runat ="server" Text ="女" GroupName ="sex" Width ="80px"/></td> 38 </tr> 39 <tr> 40 <td>电话:</td><td class="auto-style1"><asp:TextBox ID ="txtPhone" runat ="server"></asp:TextBox></td> 41 </tr> 42 <tr> 43 <td>E-mail:</td><td class="auto-style1"><asp:TextBox ID ="txtEamil" runat ="server"></asp:TextBox></td> 44 </tr> 45 <tr> 46 <td>所在城市:</td><td class="auto-style1"><asp:TextBox ID ="txtCity" runat ="server"></asp:TextBox></td> 47 </tr> 48 <tr> 49 <td><asp:Button ID ="btnregister" runat ="server" Text ="注册" OnClick ="btnregister_Click"/></td><td class="auto-style1"><asp:Button ID ="btnreturn" runat ="server" Text="返回" PostBackUrl ="~/Default.aspx" CausesValidation ="true"/></td> 50 </tr> 51 </table> 52 </form> 53 </body> 54 </html>
register.aspx.cs后台代码:
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Web.UI; 6 using System.Web.UI.WebControls; 7 8 using System.Data; 9 using System.Web.Security; 10 using System.Configuration; 11 using System.Data.SqlClient; 12 using System.Text.RegularExpressions; 13 14 public partial class _Default : System.Web.UI.Page 15 { 16 protected void Page_Load(object sender, EventArgs e) 17 { 18 } 19 20 /// <summary> 21 /// 当焦点移出文本框时,判断用户是否存在,以及输入的字符格式是否符合规定. 22 /// </summary> 23 /// <param name="sender"></param> 24 /// <param name="e"></param> 25 protected void txtName_TextChanged(object sender, EventArgs e) 26 { 27 if (this.txtName.Text == "") 28 { 29 //如果没有输入用户名,则提示用户名不能为空. 30 this.labuser.Text = " * 用户名称不能为空!"; 31 32 //改变提示lable控件文字的颜色. 33 this.labuser.ForeColor = System.Drawing.Color.Red; 34 } 35 else 36 { 37 if (isnameFormar())//调用isnameFormar方法,判断用户名是否符合格式要求. 38 { 39 if (isName())//调用iaName方法,判断用户名是否已经存在. 40 { 41 //已经注册,则提示. 42 this.labuser.Text = " * 该用户已经注册!"; 43 44 //改变提示lable控件文字的颜色. 45 this.labuser.ForeColor = System.Drawing.Color.Red; 46 } 47 else 48 { 49 //没有注册,则提示可以注册. 50 this.labuser.Text = " * 可以注册!"; 51 52 //改变提示lable控件文字的颜色. 53 this.labuser.ForeColor = System.Drawing.Color.Red; 54 } 55 } 56 else 57 { 58 //格式不对,则提示 59 this.labuser.Text = " * 用户名格式不对!"; 60 61 //改变提示lable控件文字的颜色. 62 this.labuser.ForeColor = System.Drawing.Color.Red; 63 } 64 } 65 } 66 67 /// <summary> 68 /// 注册按钮的事件 69 /// </summary> 70 /// <param name="sender"></param> 71 /// <param name="e"></param> 72 protected void btnregister_Click(object sender, EventArgs e) 73 { 74 if (isnameFormar()) 75 { 76 if (isName()) 77 { 78 this.labuser.Text = "用户名已经存在!"; 79 80 this.labuser.ForeColor = System.Drawing.Color.Red; 81 82 RegisterStartupScript("", "<script>alert(‘请输入正确信息!‘)</script>");//不报错,但是已过时,在.NET3.5和4.0中有更好的方法替代他们。 83 } 84 else 85 { 86 //获取用户名 87 string username = this.txtName.Text.Trim(); 88 89 //获取用户填写的密码,并用MD5进行加密. 90 string userpass = FormsAuthentication.HashPasswordForStoringInConfigFile(this.txtPass.Text, "MD5");//不报错,但是已过时,在.NET3.5和4.0中有更好的方法替代他们。 91 92 //获取昵称 93 string nickname = this.txtNickName.Text; 94 95 //获取性别 96 string sex = string.Empty; 97 if (this.radnan.Checked) 98 { 99 sex = "男"; 100 } 101 else if (this.radnv.Checked) 102 { 103 sex = "女"; 104 } 105 else { } 106 107 //获取电话号码 108 string phone = this.txtPhone.Text; 109 110 //获取电子邮件地址 111 string Email = this.txtEamil.Text; 112 113 //获取所在城市 114 string city = this.txtCity.Text; 115 116 string strcon = ConfigurationManager.ConnectionStrings["strcon"].ConnectionString;//连接数据库. 117 118 using (SqlConnection con = new SqlConnection(strcon)) 119 { 120 if (con.State == ConnectionState.Closed) 121 { 122 con.Open(); 123 } 124 125 SqlParameter[] paras = new SqlParameter[] 126 { 127 new SqlParameter("@username", username), 128 new SqlParameter("@userpass", userpass), 129 new SqlParameter("@nickname", nickname), 130 new SqlParameter("@sex", sex), 131 new SqlParameter("@phone", phone), 132 new SqlParameter("@Email", Email), 133 new SqlParameter("@city", city) 134 }; 135 136 string sql = "insert into tb_User (userName, userPass, nickName, sex, phone, E_mail, city) values (@username, @userpass, @nickname, @sex, @phone, @Email, @city);"; 137 138 SqlCommand cmd = new SqlCommand(sql, con); 139 140 cmd.Parameters.AddRange(paras); 141 142 if (Convert.ToInt32(cmd.ExecuteNonQuery()) > 0) 143 { 144 RegisterStartupScript("", "<script>alert(‘注册成功!‘)</script>"); 145 146 this.txtName.Text = this.txtPass.Text = this.txtQpass.Text = ""; 147 this.txtNickName.Text = this.txtPhone.Text = this.txtEamil.Text = this.txtCity.Text = ""; 148 this.labuser.Text = ""; 149 } 150 else 151 { 152 RegisterStartupScript("", "<script>alert(‘请输入正确格式!‘)</script>"); 153 } 154 } 155 } 156 } 157 else 158 { 159 RegisterStartupScript("", "<script>alert(‘请输入正确格式!‘)</script>"); 160 } 161 } 162 163 /// <summary> 164 /// 判断用户名是否符合格式要求. 165 /// </summary> 166 /// <returns></returns> 167 public bool isnameFormar() 168 { 169 bool flag = false; 170 171 //设置正则表达式.(使用此对象要导入 System.Text.RegularExpressions命名空间) 172 Regex re = new Regex("^\\w+$"); 173 174 if (re.IsMatch(this.txtName.Text.Trim())) 175 { 176 flag = true;//返回flag为真. 177 } 178 179 return flag; 180 } 181 182 /// <summary> 183 /// 判断用户名是否已经存在 184 /// </summary> 185 /// <returns></returns> 186 public bool isName() 187 { 188 bool flag = false; 189 190 string strcon = ConfigurationManager.ConnectionStrings["strcon"].ConnectionString;//连接数据库. 191 192 using (SqlConnection con = new SqlConnection(strcon)) 193 { 194 if (con.State == ConnectionState.Closed) 195 { 196 con.Open(); 197 } 198 199 SqlParameter[] paras = new SqlParameter[] 200 { 201 new SqlParameter("@userName", this.txtName.Text.Trim()) 202 }; 203 204 string sql = "select * from tb_User where userName = @userName "; 205 206 SqlCommand cmd = new SqlCommand(sql, con); 207 208 cmd.Parameters.AddRange(paras); 209 210 if ( Convert.ToInt32(cmd.ExecuteScalar()) > 0)//如果返回值大于0,则表示用户已经存在. 211 { 212 flag = true; 213 } 214 } 215 216 return flag; 217 } 218 }
以上是注册页面的编写,下面是登录页面的编写:
login.aspx代码:
1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="login.aspx.cs" Inherits="login" Debug ="true"%> 2 3 <!DOCTYPE html> 4 5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head runat="server"> 7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 8 <title></title> 9 <style type ="text/css"> 10 #imagecode { 11 text-align:left; 12 } 13 </style> 14 </head> 15 <body> 16 <form id="form1" runat="server"> 17 <div> 18 <table> 19 <tr> 20 <td>用户名:</td><td><asp:TextBox ID ="txtname" runat ="server"></asp:TextBox></td> 21 </tr> 22 <tr> 23 <td>密码:</td><td><asp:TextBox ID ="txtpass" runat ="server" TextMode ="Password"></asp:TextBox></td> 24 </tr> 25 <tr> 26 <td>验证码:</td><td><asp:TextBox ID ="yzm" runat ="server" Width ="60px"></asp:TextBox><img id ="imagecode" src ="yzm.aspx" alt ="看不清!请点击刷新!" onclick ="this.src=this.src+‘?‘" /> 27 </tr> 28 <tr> 29 <td style ="text-align:center"><asp:Button ID ="txtCode" runat ="server" Text ="登陆" OnClick ="txtCode_Click1"/></td><td style ="text-align:center"><asp:Button ID ="cz" runat ="server" Text ="重置" /></td> 30 </tr> 31 </table> 32 </div> 33 </form> 34 </body> 35 </html>
login.aspx.cs代码:
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Web.UI; 6 using System.Web.UI.WebControls; 7 8 using System.Data; 9 using System.Web.Security; 10 using System.Data.SqlClient; 11 using System.Configuration; 12 13 public partial class login : System.Web.UI.Page 14 { 15 protected void Page_Load(object sender, EventArgs e) 16 { 17 18 } 19 20 protected void txtCode_Click1(object sender, EventArgs e) 21 { 22 string code = this.yzm.Text; 23 24 if (Request.Cookies["checkcode"].Value == code) 25 { 26 string strcon = ConfigurationManager.ConnectionStrings["strcon"].ConnectionString; 27 28 using (SqlConnection con = new SqlConnection(strcon)) 29 { 30 if (con.State == ConnectionState.Closed) 31 { 32 con.Open(); 33 } 34 35 string pass = FormsAuthentication.HashPasswordForStoringInConfigFile(this.txtpass.Text, "MD5"); 36 37 SqlParameter[] paras = new SqlParameter[] 38 { 39 new SqlParameter("@pass", pass), 40 new SqlParameter("@name", this.txtname.Text) 41 }; 42 43 string sql = "select * from tb_User where userName = @name and userPass = @pass"; 44 45 SqlCommand cmd = new SqlCommand(sql, con); 46 47 cmd.Parameters.AddRange(paras); 48 49 if (Convert.ToInt32(cmd.ExecuteScalar()) > 0) 50 { 51 RegisterStartupScript("", "<script>alert(‘登录成功!‘)</script>"); 52 //清空文本框 53 txtpass.Text = yzm.Text = txtname.Text = ""; 54 } 55 else 56 { 57 RegisterStartupScript("", "<script>alert(‘用户名或密码错误!‘)</script>"); 58 } 59 } 60 } 61 else 62 { 63 RegisterStartupScript("", "<script>alert(‘验证码错误!‘)</script>"); 64 } 65 } 66 }
以上是登录页面的编写,下面是验证码的编写:
yzm.aspx代码(并没有使用一般处理程序):
-yzm.aspx前台代码不需要编写。
yzm.aspx.cs代码:
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Web.UI; 6 using System.Web.UI.WebControls; 7 8 using System.Drawing; 9 10 public partial class yzm : System.Web.UI.Page 11 { 12 protected void Page_Load(object sender, EventArgs e) 13 { 14 createyzm(random()); 15 } 16 17 /// <summary> 18 /// 这个方法是用于生成随机数 19 /// </summary> 20 /// <returns>生成的随机数</returns> 21 public string random() 22 { 23 int number;//创建一个整型变量,用于存储的单个随机数. 24 25 char a = new char();//创建一个字符变量,用于存储有整型转换成字符型的变量. 26 27 string b = string.Empty;//创建一个字符串变量,用于存储生成的随机数字符串. 28 29 Random rm = new Random();//创建一个随机数对象rm, 用于获取随机数. 30 31 //循环,用于生成单个随机数,以及把单个随机数,拼合成字符串. 32 for (int i = 0; i < 4; i++) 33 { 34 number = rm.Next();//生成随机数. 35 36 a = (char)(‘0‘ + (char)(number % 10));//把生成的随机数,无论是多大,只要除于10,得到的余数都是个位数,然后把他们转换成char类型的字符. 37 38 b += a.ToString();//把获得的单个字符,累加成一个字符创,其中一定要把,字符类型,转换成字符串类型. 39 } 40 41 Response.Cookies.Add(new HttpCookie("checkcode", b));//把生成的随机数字符串,放到创建的名为checkcode的cookies中,以便于,其他页面的调用时获取. 42 43 return b;//同时把生成的随机数返回(传出),以便于验证码制作. 44 } 45 46 /// <summary> 47 /// 这个方法是用于制作验证码 48 /// </summary> 49 /// <param name="sjs">接收random()方法生成的随机数</param> 50 public void createyzm(string sjs) 51 { 52 if (null == sjs && sjs.Trim() == string.Empty) 53 { 54 return; 55 } 56 57 System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling(sjs.Length * 12.5), 22);//方法的重载,用于制定的大小初始化System.Drawing.Bitmap类的新实例,第一个参数是宽,第二个参数是高,单位是像素. 58 59 Graphics g = Graphics.FromImage(image);//从指定的 System.Drawing.Image 创建新的 System.Drawing.Graphics。 60 61 try 62 { 63 Random random = new Random();//创建随机数生成器. 64 65 g.Clear(Color.White);//清空背景色. 66 67 //绘制噪音线 68 for (int i = 0; i <10; i++) 69 { 70 int x1 = random.Next(image.Width); 71 int x2 = random.Next(image.Width); 72 int y1 = random.Next(image.Height); 73 int y2 = random.Next(image.Height); 74 75 g.DrawLine(new Pen(Color.FromArgb( random.Next())), x1, x2, y1, y2);//绘制一条连接由坐标对指定的两个点的线条。颜色是随机的使用color.fromArgb(random.Next())。 76 } 77 78 Font font = new System.Drawing.Font("Arial", 12, (System.Drawing.FontStyle.Bold));//设置文本的字体、字号和字形。 79 80 System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Width), Color.Blue, Color.OliveDrab, 1.2f, true);//设置绘制线条的线性渐变. 81 82 g.DrawString(sjs, font, brush, 2, 2);//在指定位置并且用指定的 System.Drawing.Brush 和 System.Drawing.Font 对象绘制指定的文本字符串。 83 84 //绘制噪音点 85 for (int i = 0; i < 100; i++) 86 { 87 int x = random.Next(image.Width); 88 int y = random.Next(image.Height); 89 90 image.SetPixel(x, y, Color.FromArgb(random.Next()));//绘制随机点,其中颜色也是随机的. 91 } 92 93 //绘制验证码边框线 94 //参数一:确定矩形的颜色,宽度,和样式。 95 //参数二:要绘制的矩形的左上角的x坐标。 96 //参数三:要绘制矩形的左上角y的坐标。 97 //参数四:要绘制矩形的宽度。 98 //参数五:要绘制矩形的高度。 99 g.DrawRectangle(new Pen(Color.Black), 0, 0, image.Width - 1, image.Height - 1); 100 101 //输出到页面上 102 System.IO.MemoryStream ms = new System.IO.MemoryStream();//创建支持存储区为内存的流。 103 104 image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);//将图像以指定的格式保存到指定的流中。其中ImageFormat的作用是指定图像的文件格式。 105 106 Response.ClearContent();//清除缓冲区流中的所有内容输出。 107 108 Response.ContentType = "image/Gif";//获取或设置输出流的 http mime 类型。 109 110 Response.BinaryWrite(ms.ToArray());//将二进制字符串写入 http 输出流。 111 } 112 catch (Exception ex) 113 { 114 throw ex; 115 } 116 finally 117 { 118 g.Dispose();//释放其使用的资源 119 image.Dispose();//释放其使用的资源. 120 } 121 } 122 }
以上就是会员注册和登录模块编写过程,写下来便于以后学习。
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原文地址:http://www.cnblogs.com/KTblog/p/4214884.html