登录.vb

一个功能强大的学生公寓管理系统 界面非常友好 十分强大

Public Class 登录
    Inherits System.Windows.Forms.Form
    Public YName As String

#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 Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(登录))
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.ComboBox1 = New System.Windows.Forms.ComboBox
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.BackColor = System.Drawing.Color.FromArgb(CType(128, Byte), CType(128, Byte), CType(255, Byte))
        Me.Label1.Font = New System.Drawing.Font("宋体", 12.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label1.ForeColor = System.Drawing.Color.Blue
        Me.Label1.Location = New System.Drawing.Point(32, 40)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(63, 22)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "用户名:"
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.BackColor = System.Drawing.Color.FromArgb(CType(128, Byte), CType(128, Byte), CType(255, Byte))
        Me.Label2.Font = New System.Drawing.Font("宋体", 12.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label2.ForeColor = System.Drawing.Color.Blue
        Me.Label2.Location = New System.Drawing.Point(32, 80)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(64, 22)
        Me.Label2.TabIndex = 1
        Me.Label2.Text = "密  码:"
        '
        'Button1
        '
        Me.Button1.BackColor = System.Drawing.Color.FromArgb(CType(255, Byte), CType(192, Byte), CType(255, Byte))
        Me.Button1.Font = New System.Drawing.Font("宋体", 12.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Button1.Location = New System.Drawing.Point(64, 144)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(64, 32)
        Me.Button1.TabIndex = 2
        Me.Button1.Text = "登录"
        '
        'Button2
        '
        Me.Button2.BackColor = System.Drawing.Color.FromArgb(CType(255, Byte), CType(192, Byte), CType(255, Byte))
        Me.Button2.DialogResult = System.Windows.Forms.DialogResult.Cancel
        Me.Button2.Font = New System.Drawing.Font("宋体", 12.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Button2.Location = New System.Drawing.Point(128, 144)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(64, 32)
        Me.Button2.TabIndex = 3
        Me.Button2.Text = "取消"
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(96, 80)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox2.Size = New System.Drawing.Size(104, 21)
        Me.TextBox2.TabIndex = 1
        Me.TextBox2.Text = ""
        '
        'ComboBox1
        '
        Me.ComboBox1.Location = New System.Drawing.Point(96, 40)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(104, 20)
        Me.ComboBox1.TabIndex = 0
        '
        '登录
        '
        Me.AcceptButton = Me.Button1
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackgroundImage = CType(resources.GetObject("$this.BackgroundImage"), System.Drawing.Image)
        Me.CancelButton = Me.Button2
        Me.ClientSize = New System.Drawing.Size(256, 198)
        Me.Controls.Add(Me.ComboBox1)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.MaximizeBox = False
        Me.MinimizeBox = False
        Me.Name = "登录"
        Me.ShowInTaskbar = False
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "公寓管理系统  [登录]"
        Me.TopMost = True
        Me.ResumeLayout(False)

    End Sub

#End Region


    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Me.Text = "正在验正……"
        Dim Conn As New System.Data.OleDb.OleDbConnection
        Dim Cmd As New System.Data.OleDb.OleDbCommand
        Dim DataReader As System.Data.OleDb.OleDbDataReader
        Try
            Conn.ConnectionString = "Provider=Microsoft.Jet.Oledb.4.0;Data Source=学生公寓管理系统.mdb"
            Conn.Open()
            Dim ComStr, ps As String
            ComStr = "select * from 用户 where 用户名 ="
            ComStr &= "'" & Trim(ComboBox1.Text) & "'"
            Cmd.CommandText = ComStr
            Cmd.Connection = Conn
            DataReader = Cmd.ExecuteReader
            DataReader.Read()
            ps = DataReader.Item(1)
            If ps = Trim(TextBox2.Text) Then
                YName = Trim(TextBox2.Text)
                Dim F As New Form
                F.Show()
                Me.Hide()
            Else
                MsgBox("您的用户名或密码不正确!")
                TextBox2.Text = ""
                ComboBox1.SelectAll()
                ComboBox1.Focus()

            End If


            DataReader.Close()
            Conn.Close()
        Catch ex As Exception
            MsgBox("用户名不存在!")
            TextBox2.Text = ""
            ComboBox1.SelectAll()
            ComboBox1.Focus()
        End Try
        Me.Text = "我的通讯录[登录]"
    End Sub

    Private Sub 登录_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim Conn As New System.Data.OleDb.OleDbConnection
        Dim Cmd As New System.Data.OleDb.OleDbCommand
        Dim DataReader As System.Data.OleDb.OleDbDataReader
        Try
            Conn.ConnectionString = "Provider=Microsoft.Jet.Oledb.4.0;Data Source=学生公寓管理系统.mdb"
            Conn.Open()
            Cmd.CommandText = "Select * from 用户"
            Cmd.Connection = Conn
            DataReader = Cmd.ExecuteReader
            While DataReader.Read()
                ComboBox1.Items.Add(DataReader.Item(0))
            End While
            DataReader.Close()
            Conn.Close()
        Catch ex As Exception

        End Try

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Application.Exit()

    End Sub
End Class