ASP.NET登录注册页面实现

2020-01-17 23:06:56

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如何利用Visual studio 2010创建一个ASP网站？
【文件】-->【新建】-->【网站】-->【ASP.Net网站】--【完成】

默认页面Default.aspx
创建以上界面：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UserLogin.aspx.cs" Inherits="UserLogin" %>  <!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></title> </head> <body>  <div align="center">  <h1>用户登录页面</h1>  <form id="form1" runat="server">   <p> <asp:Label ID="lbusername" runat="server">用户名：</asp:Label>    <asp:TextBox ID="tbusername" runat="server"></asp:TextBox>    </p>    <p> <asp:Label ID="lbpsw" runat="server">密 码：</asp:Label>   <asp:TextBox ID="tbpsw" runat="server" TextMode="Password"></asp:TextBox>   </p>   <p><asp:Button ID="btnLogin" runat="server" Text="登录" onclick="btnLogin_Click" />    <asp:Button ID="btnCancel" runat="server" Text="取消" onclick="btnCancel_Click" />   </p>  </form>  </div> </body> </html>

登录验证功能

/// <summary>  /// 用户登录  /// </summary>  /// <param name="sender"></param>  /// <param name="e"></param>  protected void btnLogin_Click(object sender, EventArgs e)  {   if (tbusername.Text == "")   {    Response.Write(@"<script>alert('用户名不能为空！');</script>");   }   if (tbpsw.Text == "")   {    Response.Write(@"<script>alert('密码不能为空！');</script>");   }   string username = tbusername.Text;   string password = tbpsw.Text;   string sql = "select * from T_user where username=@username and password=@password";   SqlParameter[] parameters = { new SqlParameter("@username",username), new SqlParameter("@password", password) };   using (SqlConnection conn = new SqlConnection(connstr))   {    conn.Open();    using (SqlCommand cmd = conn.CreateCommand())    {     cmd.CommandText = sql;     cmd.Parameters.AddRange(parameters);     DataSet ds = new DataSet();     SqlDataAdapter adapter = new SqlDataAdapter(cmd);     adapter.Fill(ds);     DataTable table = ds.Tables[0];     if(table != null)      Response.Write(@"<script>alert('登录成功！');</script>");     else      Response.Write(@"<script>alert('登录失败！');</script>");     }   }      }

注册功能

/// <summary>  /// 用户注册  /// </summary>  /// <param name="sender"></param>  /// <param name="e"></param>  protected void brnRegister_Click(object sender, EventArgs e)  {   string username = tbusername.Text;   string password = tbpsw.Text;   string sql = "Insert into T_user(username, password) values(@username,@password)";   SqlParameter[] parameters = { new SqlParameter("@username", username), new SqlParameter("@password", password) };   using (SqlConnection conn = new SqlConnection(connstr))   {    conn.Open();    using (SqlCommand cmd = conn.CreateCommand())    {     cmd.CommandText = sql;     cmd.Parameters.AddRange(parameters);     cmd.ExecuteNonQuery();    }   }    Response.Write(@"<script>alert('注册成功！');</script>");  }

知识点归纳：
1.如何创建一个ASP.Net网站
2. 使用服务器控件实现界面设计
3. 对数据库的简单操作

一个简单的用户注册、登录就完成了，通过这个案例希望对大家的学习有所帮助。

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