loginform.vb

这是电脑销售管理系统

Public Class LoginForm
    Inherits System.Windows.Forms.Form

    Dim My_Login_Var As New Login__Class
    Dim My__System__MainForm As New MainForm
    Public Member As Integer

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    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

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(LoginForm))
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(97, 247)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(127, 21)
        Me.TextBox1.TabIndex = 0
        Me.TextBox1.Text = ""
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(97, 272)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox2.Size = New System.Drawing.Size(127, 21)
        Me.TextBox2.TabIndex = 1
        Me.TextBox2.Text = ""
        '
        'Button1
        '
        Me.Button1.BackColor = System.Drawing.SystemColors.Desktop
        Me.Button1.ForeColor = System.Drawing.SystemColors.ActiveCaptionText
        Me.Button1.Location = New System.Drawing.Point(32, 314)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(63, 23)
        Me.Button1.TabIndex = 4
        Me.Button1.Text = "登陆"
        '
        'Button2
        '
        Me.Button2.BackColor = System.Drawing.SystemColors.Desktop
        Me.Button2.ForeColor = System.Drawing.SystemColors.ActiveCaptionText
        Me.Button2.Location = New System.Drawing.Point(104, 314)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(52, 23)
        Me.Button2.TabIndex = 5
        Me.Button2.Text = "注册"
        '
        'Button3
        '
        Me.Button3.BackColor = System.Drawing.SystemColors.Desktop
        Me.Button3.ForeColor = System.Drawing.SystemColors.ActiveCaptionText
        Me.Button3.Location = New System.Drawing.Point(170, 314)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(55, 23)
        Me.Button3.TabIndex = 6
        Me.Button3.Text = "取消"
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.BackColor = System.Drawing.Color.Transparent
        Me.Label1.ForeColor = System.Drawing.SystemColors.ActiveCaptionText
        Me.Label1.Location = New System.Drawing.Point(32, 251)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(54, 17)
        Me.Label1.TabIndex = 7
        Me.Label1.Text = "用户名称"
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.BackColor = System.Drawing.Color.Transparent
        Me.Label2.ForeColor = System.Drawing.SystemColors.ActiveCaptionText
        Me.Label2.Location = New System.Drawing.Point(32, 276)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(54, 17)
        Me.Label2.TabIndex = 8
        Me.Label2.Text = "用户密码"
        '
        'LoginForm
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.SystemColors.ActiveCaptionText
        Me.BackgroundImage = CType(resources.GetObject("$this.BackgroundImage"), System.Drawing.Image)
        Me.ClientSize = New System.Drawing.Size(274, 373)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.MinimizeBox = False
        Me.Name = "LoginForm"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "电脑销售系统登陆窗口"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Member = My_Login_Var.Select_MyConnection(TextBox1.Text, TextBox2.Text)
        If Member = 0 Then
            MsgBox("对不起！非授权用户使用无效", MsgBoxStyle.Information, "提示窗口")
        Else
            Me.Hide()
            My__System__MainForm.Show()
        End If
    End Sub
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        My_Login_Var.Addnews(TextBox1.Text, TextBox2.Text)
        If My_Login_Var.GetState_Add Then
            MsgBox("你已经成功的加入一条记录！", MsgBoxStyle.Information, "提示窗口")
        End If
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        My_Login_Var.EndSub()
    End Sub

    Private Sub Form1_closeing(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
        Dim CurrentFormstr As String
        If Not e.Cancel Then
            CurrentFormstr = "你确实关闭" & Me.Text & "窗口吗？"
        End If
        If MsgBox(CurrentFormstr, 36, Me.Text) = 7 Then
            e.Cancel = True
            My__System__MainForm.Close()
            My_Login_Var = Nothing
            My__System__MainForm = Nothing
            MyBase.Close()
        End If

    End Sub
End Class