login.aspx:::
<body style="BACKGROUND-IMAGE: url(images/index.gif); BACKGROUND-REPEAT: no-repeat" leftMargin="0"
topMargin="0">
<table height="450" width="450" border="0">
<tr>
<td borderColor="#ffffff">
<form id="Form1" runat="server">

        <table align="left">
          <tr>

            <td height="13" style="HEIGHT: 13px">用户类型</td>
<td style="HEIGHT: 13px"><SELECT id="UserType" style="WIDTH: 80px" name="" runat="server">
<OPTION value="Patient" selected>病人</OPTION>
<OPTION value="Doctor">医生</OPTION>
<OPTION value="Admin">管理员</OPTION>
</SELECT></td>
<td style="HEIGHT: 13px"></td>
<td style="HEIGHT: 13px"><asp:checkbox id="chkPersistLogin" runat="server"></asp:checkbox>记住我的登陆</td>
<td style="HEIGHT: 13px"><FONT face="宋体">&nbsp;</FONT></td>
<td style="HEIGHT: 13px"><FONT face="宋体">&nbsp;</FONT></td>
</tr>
<tr>

            <td height="18" >用户名</td>

            <td height="18" >
<input id="UserID" style="WIDTH: 80px; HEIGHT: 17px" type="text" size="8" name="UserID"
runat="server"></td>
          <TD height=18 ?></TD>

            <td height="18" colSpan="1" ><FONT face="宋体">
<asp:CheckBox id="CheckBox2" runat="server" AutoPostBack="True"></asp:CheckBox>用户注册</FONT>
</td>

            <td height="18" ></td>
          <TD height=18>
<asp:button id=ButSubmit onclick=ButSubmit_Click runat="server" text="登陆"></asp:button></TD>
          </tr>
        <TR>
          <TD style="HEIGHT: 15px" align=center colSpan=1>
            <P align=left>密码&nbsp;</P></TD>
          <TD style="HEIGHT: 15px"><INPUT id=UserPassword 
            style="WIDTH: 80px; HEIGHT: 17px" type=password size=6 
            name=UserPassword runat="server"></TD>
          <TD style="HEIGHT: 15px"><ASP:REQUIREDFIELDVALIDATOR id="Requiredfieldvalidator2" runat="server" ErrorMessage="*" Display="Static" ControlToValidate="UserPassword"></ASP:REQUIREDFIELDVALIDATOR></TD>
<td style="HEIGHT: 15px"><FONT face="宋体">
<asp:CheckBox id="CheckBox1" runat="server" AutoPostBack="True"></asp:CheckBox>游客参观</FONT></td>
<td style="HEIGHT: 15px" align="center"><FONT face="宋体">&nbsp;</FONT></td></TR>
<tr>
<td colSpan="5"><asp:label id="LabMessage" runat="server" Font-Size="10" Font-Name="Verdana" ForeColor="red"></asp:label></td>
</tr>
<tr>
<td colSpan="5"><span align="center">试用帐号、密码如下</span><br>
<li>
医生帐号:2 密码:222
<li>
病人帐号:004 密码:004
<li>
管理员帐号:1 密码:zzj</li></td>
</tr>
</table>
</form>
</td>
</tr>
</table>
</body>

解决方案 »

  1.   

    login.aspx.cs:::
    using System;
    using System.Collections;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Web;
    using System.Web.SessionState;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Web.UI.HtmlControls;
    using System.Data.SqlClient;
    using System.Web.Security;namespace WebApplication
    {
    /// <summary>
    /// Summary description for login.
    /// </summary>
    public class login : System.Web.UI.Page
    {
    protected System.Web.UI.HtmlControls.HtmlForm Form1;
    protected SqlConnection MyConnection;
    protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator1;
    protected System.Web.UI.WebControls.RequiredFieldValidator Requiredfieldvalidator2;
    protected System.Web.UI.WebControls.Button Button1;
    protected System.Web.UI.WebControls.Button ButSubmit;
    protected System.Web.UI.HtmlControls.HtmlInputText UserID;
    protected System.Web.UI.HtmlControls.HtmlSelect UserType;
    protected string MyConnectionString;
    protected string sUserPassword;
    protected System.Web.UI.WebControls.Label LabMessage;
    protected System.Web.UI.WebControls.CheckBox chkPersistLogin;
    protected System.Web.UI.HtmlControls.HtmlInputText UserPassword;
    protected System.Web.UI.WebControls.CheckBox CheckBox1;
    protected System.Web.UI.WebControls.CheckBox CheckBox2;
    protected SqlDataReader reader;

    private void Page_Load(object sender, System.EventArgs e)
    {
    // Put user code to initialize the page here
    } #region Web Form Designer generated code
    override protected void OnInit(EventArgs e)
    {
    //
    // CODEGEN: This call is required by the ASP.NET Web Form Designer.
    //
    InitializeComponent();
    base.OnInit(e);
    }

    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {    
    this.ButSubmit.Click += new System.EventHandler(this.ButSubmit_Click);
    this.CheckBox1.CheckedChanged += new System.EventHandler(this.CheckBox1_CheckedChanged);
    this.CheckBox2.CheckedChanged += new System.EventHandler(this.CheckBox2_CheckedChanged);
    this.Load += new System.EventHandler(this.Page_Load); }
    #endregion protected void ButSubmit_Click(object sender, System.EventArgs e)
    {
    MyConnection = new SqlConnection();
    MyConnection.ConnectionString=System.Configuration.ConfigurationSettings.AppSettings["SqlConnectionString"];
    try
    {
    if(UserType.Value=="Doctor")
    {
    string MySelectString = @"Select DoctorPassword from Doctors Where DoctorID= '"+Convert.ToInt16(UserID.Value)+"'";
    SqlCommand MyCommand = new SqlCommand(MySelectString,MyConnection);
    MyCommand.Connection.Open();
    reader = MyCommand.ExecuteReader();
    while(reader.Read())
    {
    sUserPassword = reader.GetString(0);
    }
    MyCommand.Connection.Close();
    if(UserPassword.Value==sUserPassword) 
    {
    Getin();
    }
    else Getout(); } if(UserType.Value=="Patient")
    {
    string MySelectString = @"Select PatientPassword from Patients Where PatientUserID= '"+UserID.Value+"'";
    SqlCommand MyCommand = new SqlCommand(MySelectString,MyConnection);
    MyCommand.Connection.Open();
    reader = MyCommand.ExecuteReader();
    while(reader.Read())
    {
    sUserPassword = reader.GetString(0);
    }
    MyCommand.Connection.Close();
    if(UserPassword.Value==sUserPassword) 
    Getin();
    else Getout();
    } if(UserType.Value=="Admin")
    {
    string MySelectString = @"Select AdminPassword from Admin Where AdminID= '"+Convert.ToInt16(UserID.Value)+"'";
    SqlCommand MyCommand = new SqlCommand(MySelectString,MyConnection);
    MyCommand.Connection.Open();
    reader = MyCommand.ExecuteReader();
    while(reader.Read())
    {
    sUserPassword = reader.GetString(0);
    }
    MyCommand.Connection.Close();
    if(UserPassword.Value==sUserPassword) Getin();
    else Getout();
    }
    if(UserType.Value=="Guest")
    {
    if(UserID.Value=="Guest"&&UserPassword.Value=="Guest")
     Getin();
    else Getout();
    }
    }
    catch(Exception etc)
    {
    Getout();
    } } protected void Getin()
    {
    HttpCookie cookie=new HttpCookie("aspx");
    cookie["UserID"]=UserID.Value;
    Session["UserID"]=UserID.Value;
    Session["UserType"]=UserType.Value;
    cookie["UserType"]=UserType.Value;
    cookie["Userpassword"]=UserPassword.Value;;
    Response.Cookies.Add(cookie);
    FormsAuthentication.RedirectFromLoginPage(UserID.Value,chkPersistLogin.Checked);
    }
    protected void Getout()
    {
    LabMessage.Text = "凭据无效:请再试一次";
    } private void CheckBox1_CheckedChanged(object sender, System.EventArgs e)
    {
    if(CheckBox1.Checked)
    {
    HttpCookie cookie=new HttpCookie("aspx");
    cookie["UserType"]="Guest";
    Response.Cookies.Add(cookie);
    FormsAuthentication.RedirectFromLoginPage(UserID.Value,chkPersistLogin.Checked);
    Response.Redirect("Guest_Default.aspx");
    }
    } private void CheckBox2_CheckedChanged(object sender, System.EventArgs e)
    {
    if(CheckBox2.Checked)
    {
    HttpCookie cookie=new HttpCookie("aspx");
    cookie["UserType"]="Patient";
    cookie["UserType1"]="Patient1";
    Session["UserType"]="Patient";
    FormsAuthentication.RedirectFromLoginPage(UserID.Value,chkPersistLogin.Checked);
    Response.Redirect("Register1.aspx");
    }
    } }
    }
      

  2.   

    我不要WEB的,我要winform的.
    谢谢~~
      

  3.   

    /*登陆*/
    //主窗体Global
    static void Main() 
    {
    if((new Login()).ShowDialog() == DialogResult.OK) Application.Run(new Global());
    }
    //登陆窗体Login
    if(true)this.DialogResult = DialogResult.OK;/*注销*/
    private void mnuLogout_Click(object sender, System.EventArgs e)
    {
      this.Hide();
      if((new Login()).ShowDialog() == DialogResult.OK)this.Show();
      else Application.Exit();
    }下面的是以前的贴子,搂主可以参考一下(包括登录成功后的用户信息如何传给主窗体?)
    http://expert.csdn.net/Expert/topic/2024/2024955.xml?temp=3.544253E-02
      

  4.   

    楼上的,我的E是:[email protected]
      

  5.   

    帮你一把吧主窗体的load事件中:
    int errornum=0;
    Login frmLogin=new Login();//登录窗体,上面右textbox2个button2个
                               //设好button的dialogresult属性ok和cancel
    again:
    if(errornum>2) {//错误三次退出
    this.Close();//关闭主窗体,程序自动退出
    return;
    }
    frmLogin.Update();
    if(frmLogin.ShowDialog()!=DialogResult.OK) {
    this.Close();
    return;
    }
    string username=frmLogin.textBox2.Text;
    String pswd=frmLogin.textBox1.Text;
    if(username!="admin"){
    MessageBox.Show("用户不存在!");
    errornum++;
    goto again;
    }
    if("12345"!=pswd) {
    MessageBox.Show("密码错误!");
    errornum++;
    goto again;
    }
    //成功的话会到达这里
      

  6.   

    tianxingjian1273(叫你说你就说,一点人格都没有!) 发出去了,收到了么?