login.vb

图书管理系统,用来管理图书的借还,以及借阅超过时间进行处罚,和管理员用户权限

Imports System.Data
Imports System.Data.SqlClient
Public Class frmLogin
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写 dispose 以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents bnadminCancel As System.Windows.Forms.Button
    Friend WithEvents bnadminLogin As System.Windows.Forms.Button
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents tbPwd As System.Windows.Forms.TextBox
    Friend WithEvents tbLoginname As System.Windows.Forms.TextBox
    Friend WithEvents GroupBox2 As System.Windows.Forms.GroupBox
    Friend WithEvents bnusercancel As System.Windows.Forms.Button
    Friend WithEvents bnuserlogin As System.Windows.Forms.Button
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents Label5 As System.Windows.Forms.Label
    Friend WithEvents tbuserpwd As System.Windows.Forms.TextBox
    Friend WithEvents tbcardid As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(frmLogin))
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.bnadminCancel = New System.Windows.Forms.Button
        Me.bnadminLogin = New System.Windows.Forms.Button
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label1 = New System.Windows.Forms.Label
        Me.tbPwd = New System.Windows.Forms.TextBox
        Me.tbLoginname = New System.Windows.Forms.TextBox
        Me.GroupBox2 = New System.Windows.Forms.GroupBox
        Me.bnusercancel = New System.Windows.Forms.Button
        Me.bnuserlogin = New System.Windows.Forms.Button
        Me.Label3 = New System.Windows.Forms.Label
        Me.Label4 = New System.Windows.Forms.Label
        Me.tbuserpwd = New System.Windows.Forms.TextBox
        Me.tbcardid = New System.Windows.Forms.TextBox
        Me.Label5 = New System.Windows.Forms.Label
        Me.GroupBox1.SuspendLayout()
        Me.GroupBox2.SuspendLayout()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.bnadminCancel)
        Me.GroupBox1.Controls.Add(Me.bnadminLogin)
        Me.GroupBox1.Controls.Add(Me.Label2)
        Me.GroupBox1.Controls.Add(Me.Label1)
        Me.GroupBox1.Controls.Add(Me.tbPwd)
        Me.GroupBox1.Controls.Add(Me.tbLoginname)
        Me.GroupBox1.Location = New System.Drawing.Point(47, 88)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(240, 152)
        Me.GroupBox1.TabIndex = 0
        Me.GroupBox1.TabStop = False
        Me.GroupBox1.Text = "管理员登录"
        '
        'bnadminCancel
        '
        Me.bnadminCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.bnadminCancel.Location = New System.Drawing.Point(144, 96)
        Me.bnadminCancel.Name = "bnadminCancel"
        Me.bnadminCancel.TabIndex = 11
        Me.bnadminCancel.Text = "取消"
        '
        'bnadminLogin
        '
        Me.bnadminLogin.DialogResult = System.Windows.Forms.DialogResult.OK
        Me.bnadminLogin.Location = New System.Drawing.Point(16, 96)
        Me.bnadminLogin.Name = "bnadminLogin"
        Me.bnadminLogin.TabIndex = 10
        Me.bnadminLogin.Text = "登录"
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(19, 72)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(48, 16)
        Me.Label2.TabIndex = 9
        Me.Label2.Text = "密码："
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(11, 40)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(56, 16)
        Me.Label1.TabIndex = 8
        Me.Label1.Text = "登陆名："
        '
        'tbPwd
        '
        Me.tbPwd.Location = New System.Drawing.Point(83, 64)
        Me.tbPwd.Name = "tbPwd"
        Me.tbPwd.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.tbPwd.Size = New System.Drawing.Size(144, 21)
        Me.tbPwd.TabIndex = 7
        Me.tbPwd.Text = ""
        '
        'tbLoginname
        '
        Me.tbLoginname.Location = New System.Drawing.Point(83, 40)
        Me.tbLoginname.Name = "tbLoginname"
        Me.tbLoginname.Size = New System.Drawing.Size(144, 21)
        Me.tbLoginname.TabIndex = 6
        Me.tbLoginname.Text = ""
        '
        'GroupBox2
        '
        Me.GroupBox2.Controls.Add(Me.bnusercancel)
        Me.GroupBox2.Controls.Add(Me.bnuserlogin)
        Me.GroupBox2.Controls.Add(Me.Label3)
        Me.GroupBox2.Controls.Add(Me.Label4)
        Me.GroupBox2.Controls.Add(Me.tbuserpwd)
        Me.GroupBox2.Controls.Add(Me.tbcardid)
        Me.GroupBox2.Location = New System.Drawing.Point(295, 88)
        Me.GroupBox2.Name = "GroupBox2"
        Me.GroupBox2.Size = New System.Drawing.Size(264, 152)
        Me.GroupBox2.TabIndex = 1
        Me.GroupBox2.TabStop = False
        Me.GroupBox2.Text = "借阅用户登录"
        '
        'bnusercancel
        '
        Me.bnusercancel.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.bnusercancel.Location = New System.Drawing.Point(171, 93)
        Me.bnusercancel.Name = "bnusercancel"
        Me.bnusercancel.TabIndex = 11
        Me.bnusercancel.Text = "取消"
        '
        'bnuserlogin
        '
        Me.bnuserlogin.DialogResult = System.Windows.Forms.DialogResult.OK
        Me.bnuserlogin.Location = New System.Drawing.Point(67, 93)
        Me.bnuserlogin.Name = "bnuserlogin"
        Me.bnuserlogin.TabIndex = 10
        Me.bnuserlogin.Text = "登录"
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(35, 69)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(48, 16)
        Me.Label3.TabIndex = 9
        Me.Label3.Text = "密码："
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(27, 37)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(69, 16)
        Me.Label4.TabIndex = 8
        Me.Label4.Text = "借阅证号："
        '
        'tbuserpwd
        '
        Me.tbuserpwd.Location = New System.Drawing.Point(99, 61)
        Me.tbuserpwd.Name = "tbuserpwd"
        Me.tbuserpwd.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.tbuserpwd.Size = New System.Drawing.Size(144, 21)
        Me.tbuserpwd.TabIndex = 7
        Me.tbuserpwd.Text = ""
        '
        'tbcardid
        '
        Me.tbcardid.Location = New System.Drawing.Point(99, 37)
        Me.tbcardid.Name = "tbcardid"
        Me.tbcardid.Size = New System.Drawing.Size(144, 21)
        Me.tbcardid.TabIndex = 6
        Me.tbcardid.Text = ""
        '
        'Label5
        '
        Me.Label5.ForeColor = System.Drawing.Color.Red
        Me.Label5.Location = New System.Drawing.Point(112, 48)
        Me.Label5.Name = "Label5"
        Me.Label5.Size = New System.Drawing.Size(352, 16)
        Me.Label5.TabIndex = 2
        Me.Label5.Text = "按你的方式正确登录系统----本系统欢迎管理员或借阅用户登录"
        Me.Label5.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'frmLogin
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(618, 256)
        Me.Controls.Add(Me.Label5)
        Me.Controls.Add(Me.GroupBox2)
        Me.Controls.Add(Me.GroupBox1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.Name = "frmLogin"
        Me.Text = "登录"
        Me.GroupBox1.ResumeLayout(False)
        Me.GroupBox2.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region
    Public iControl As Integer
    Public loginname As String
    Private Sub bnadminLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnadminLogin.Click
        Dim strLoginname As String = tbLoginname.Text.Trim()
        Dim strPwd As String = tbPwd.Text.Trim()
        Dim strSource As String = "workstation id=郭洪博;packet size=4096;integrated security=SSPI;initial catalog=books;persist security info=False"
        Dim strSelect As String = "select password,control from admin where username = '" + strLoginname + "'"
        'server=CHANGHAIFENG;uid=sa;pwd=;database=books
        Dim conn As SqlConnection = New SqlConnection(strSource)
        Try
            conn.Open()
            Dim cmd As SqlCommand = New SqlCommand(strSelect, conn)
            Dim reader As SqlDataReader = cmd.ExecuteReader()

            If Not reader.HasRows Then
                MessageBox.Show("登陆名错误！")
                conn.Close()
                Exit Sub
            End If

            reader.Read()

            Dim strDBPwd As String = reader.Item("password").ToString().Trim()
            iControl = Convert.ToInt32(reader.Item("control").ToString().Trim())
            loginname = strLoginname


            If strPwd = strDBPwd Then
                conn.Close()
                Dim frmMain As New frmadmin
                Me.Hide()
                frmMain.loginname = loginname
                frmMain.ictrl = iControl
                frmMain.Show()
            Else
                MessageBox.Show("口令错误！")
                conn.Close()
                Exit Sub
            End If
        Catch ex As Exception
            MessageBox.Show(ex.ToString)
            Exit Sub

        End Try
       
    End Sub

    Private Sub bnuserlogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnuserlogin.Click
        Dim strcardid As String = tbcardid.Text.Trim()
        Dim strPwd As String = tbuserpwd.Text.Trim()

        Dim strSource As String = "workstation id=郭洪博;packet size=4096;integrated security=SSPI;initial catalog=books;persist security info=False"
        Dim strSelect As String = "select password from bookcard where cardid = '" + strcardid + "'"

        Dim conn As SqlConnection = New SqlConnection(strSource)
        Try
            conn.Open()
            Dim cmd As SqlCommand = New SqlCommand(strSelect, conn)
            Dim reader As SqlDataReader = cmd.ExecuteReader()

            If Not reader.HasRows Then
                MessageBox.Show("登陆名错误！")
                conn.Close()
                Exit Sub
            End If

            reader.Read()

            Dim strDBPwd As String = reader.Item("password").ToString().Trim()

            loginname = strcardid


            If strPwd = strDBPwd Then
                conn.Close()
                Dim frmMain As New frmuser
                Me.Hide()
                frmMain.loginname = loginname

                frmMain.Show()
            Else
                MessageBox.Show("口令错误！")
                conn.Close()
                Exit Sub
            End If
        Catch ex As Exception
            MessageBox.Show(ex.ToString)
            Exit Sub

        End Try
    End Sub

    Private Sub bnadminCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnadminCancel.Click
        Me.Close()
    End Sub

    Private Sub bnusercancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bnusercancel.Click
        Me.Close()
    End Sub

    Private Sub PictureBox1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

    End Sub
End Class