frmlogin.vb

VB写的进销存管理系统

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 LblServer As System.Windows.Forms.Label
    Friend WithEvents LblDB As System.Windows.Forms.Label
    Friend WithEvents LblUserName As System.Windows.Forms.Label
    Friend WithEvents LblPassword As System.Windows.Forms.Label
    Friend WithEvents txtDB As System.Windows.Forms.TextBox
    Friend WithEvents txtUserName As System.Windows.Forms.TextBox
    Friend WithEvents txtPassword As System.Windows.Forms.TextBox
    Friend WithEvents buttonLogin As System.Windows.Forms.Button
    Friend WithEvents buttonCancel As System.Windows.Forms.Button
    Friend WithEvents cobServer As System.Windows.Forms.ComboBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.LblServer = New System.Windows.Forms.Label
        Me.LblDB = New System.Windows.Forms.Label
        Me.LblUserName = New System.Windows.Forms.Label
        Me.LblPassword = New System.Windows.Forms.Label
        Me.cobServer = New System.Windows.Forms.ComboBox
        Me.txtDB = New System.Windows.Forms.TextBox
        Me.txtUserName = New System.Windows.Forms.TextBox
        Me.txtPassword = New System.Windows.Forms.TextBox
        Me.buttonLogin = New System.Windows.Forms.Button
        Me.buttonCancel = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'LblServer
        '
        Me.LblServer.Location = New System.Drawing.Point(16, 32)
        Me.LblServer.Name = "LblServer"
        Me.LblServer.Size = New System.Drawing.Size(72, 24)
        Me.LblServer.TabIndex = 0
        Me.LblServer.Text = "服务器："
        '
        'LblDB
        '
        Me.LblDB.Location = New System.Drawing.Point(16, 72)
        Me.LblDB.Name = "LblDB"
        Me.LblDB.Size = New System.Drawing.Size(72, 24)
        Me.LblDB.TabIndex = 1
        Me.LblDB.Text = "数据库："
        '
        'LblUserName
        '
        Me.LblUserName.Location = New System.Drawing.Point(16, 112)
        Me.LblUserName.Name = "LblUserName"
        Me.LblUserName.Size = New System.Drawing.Size(72, 24)
        Me.LblUserName.TabIndex = 2
        Me.LblUserName.Text = "用户名："
        '
        'LblPassword
        '
        Me.LblPassword.Location = New System.Drawing.Point(16, 152)
        Me.LblPassword.Name = "LblPassword"
        Me.LblPassword.Size = New System.Drawing.Size(72, 24)
        Me.LblPassword.TabIndex = 3
        Me.LblPassword.Text = "密码："
        '
        'cobServer
        '
        Me.cobServer.Location = New System.Drawing.Point(88, 32)
        Me.cobServer.Name = "cobServer"
        Me.cobServer.Size = New System.Drawing.Size(216, 20)
        Me.cobServer.TabIndex = 4
        Me.cobServer.Text = "(local)"
        '
        'txtDB
        '
        Me.txtDB.Location = New System.Drawing.Point(88, 72)
        Me.txtDB.Name = "txtDB"
        Me.txtDB.Size = New System.Drawing.Size(216, 21)
        Me.txtDB.TabIndex = 5
        Me.txtDB.Text = "jxcdatabase"
        '
        'txtUserName
        '
        Me.txtUserName.Location = New System.Drawing.Point(88, 112)
        Me.txtUserName.Name = "txtUserName"
        Me.txtUserName.Size = New System.Drawing.Size(216, 21)
        Me.txtUserName.TabIndex = 6
        Me.txtUserName.Text = ""
        '
        'txtPassword
        '
        Me.txtPassword.Location = New System.Drawing.Point(88, 152)
        Me.txtPassword.Name = "txtPassword"
        Me.txtPassword.Size = New System.Drawing.Size(216, 21)
        Me.txtPassword.TabIndex = 7
        Me.txtPassword.Text = ""
        '
        'buttonLogin
        '
        Me.buttonLogin.Location = New System.Drawing.Point(360, 104)
        Me.buttonLogin.Name = "buttonLogin"
        Me.buttonLogin.Size = New System.Drawing.Size(72, 24)
        Me.buttonLogin.TabIndex = 8
        Me.buttonLogin.Text = "登陆"
        '
        'buttonCancel
        '
        Me.buttonCancel.Location = New System.Drawing.Point(360, 144)
        Me.buttonCancel.Name = "buttonCancel"
        Me.buttonCancel.Size = New System.Drawing.Size(72, 24)
        Me.buttonCancel.TabIndex = 9
        Me.buttonCancel.Text = "取消"
        '
        'frmLogin
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(464, 206)
        Me.Controls.Add(Me.buttonCancel)
        Me.Controls.Add(Me.buttonLogin)
        Me.Controls.Add(Me.txtPassword)
        Me.Controls.Add(Me.txtUserName)
        Me.Controls.Add(Me.txtDB)
        Me.Controls.Add(Me.cobServer)
        Me.Controls.Add(Me.LblPassword)
        Me.Controls.Add(Me.LblUserName)
        Me.Controls.Add(Me.LblDB)
        Me.Controls.Add(Me.LblServer)
        Me.Location = New System.Drawing.Point(300, 300)
        Me.MaximizeBox = False
        Me.MinimizeBox = False
        Me.Name = "frmLogin"
        Me.Text = "登陆"
        Me.ResumeLayout(False)

    End Sub

#End Region

 
    Private Sub buttonLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles buttonLogin.Click
        UID = txtUserName.Text
        PWD = txtPassword.Text
        myDataBase = txtDB.Text
        myServer = cobServer.Text
        If db.ConnectionString <> "" Then
            MsgBox("已有用户登陆，请先注销当前用户再登陆", , "登陆")
            Me.Close()
            Exit Sub
        End If
        db.ConnectionString = "workstation id=" & myServer & ";packet size=4096;" & "user id=" & UID & ";password=" & PWD & ";data source=" & myServer & ";persist security info=False;" & "initial catalog=" & myDataBase
        If UID = "" Then
            MsgBox("请先输入用户名", , "登陆")
            Me.Close()
            Exit Sub
        End If
        On Error GoTo ErrorHandle
        db.Open()
        db.Close()
        With frmMain1
            .mnuDatabase.Enabled = True
            .mnuTrade.Enabled = True
            .mnuStatistics.Enabled = True
            .mnuReport.Enabled = True
            .mnuDatabase.MenuItems(0).Enabled = True
            .mnuDatabase.MenuItems(1).Enabled = True
            .mnuDatabase.MenuItems(2).Enabled = True
            .mnuDatabase.MenuItems(3).Enabled = True
            .mnuDatabase.MenuItems(4).Enabled = True
            .mnuDatabase.MenuItems(5).Enabled = True
            .mnuDatabase.MenuItems(6).Enabled = True
            .mnuDatabase.MenuItems(7).Enabled = True
        End With
        Me.Close()
        Exit Sub
ErrorHandle:
        ShowErr()
        db.ConnectionString = ""
        UID = ""
        PWD = ""
        myServer = ""
        myDataBase = ""
        Me.Close()
    End Sub

    Private Sub buttonCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles buttonCancel.Click
        Me.Close()
        With frmMain1
            .mnuDatabase.Enabled = False
            .mnuTrade.Enabled = False
            .mnuStatistics.Enabled = False
            .mnuReport.Enabled = False
            .mnuDatabase.MenuItems(0).Enabled = False
            .mnuDatabase.MenuItems(1).Enabled = False
            .mnuDatabase.MenuItems(2).Enabled = False
            .mnuDatabase.MenuItems(3).Enabled = False
            .mnuDatabase.MenuItems(4).Enabled = False
            .mnuDatabase.MenuItems(5).Enabled = False
            .mnuDatabase.MenuItems(6).Enabled = False
            .mnuDatabase.MenuItems(7).Enabled = False
        End With
    End Sub

    Private Sub frmLogin_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        If db.ConnectionString <> "" Then
            MsgBox("已有用户登陆，请先注销当前用户再登陆", , "登陆")
            Me.Close()
            Exit Sub
        End If
    End Sub
End Class