login.vb

一个很不错的学生管理系统

Public Class Login
    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 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
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Login))
        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.SuspendLayout()
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(72, 192)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(112, 21)
        Me.TextBox1.TabIndex = 1
        Me.TextBox1.Text = ""
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(240, 192)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.PasswordChar = Microsoft.VisualBasic.ChrW(42)
        Me.TextBox2.Size = New System.Drawing.Size(120, 21)
        Me.TextBox2.TabIndex = 3
        Me.TextBox2.Text = ""
        '
        'Button1
        '
        Me.Button1.BackColor = System.Drawing.SystemColors.ActiveCaptionText
        Me.Button1.Location = New System.Drawing.Point(408, 189)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 7
        Me.Button1.Text = "登陆"
        '
        'Button2
        '
        Me.Button2.BackColor = System.Drawing.SystemColors.ActiveCaptionText
        Me.Button2.Location = New System.Drawing.Point(488, 188)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 8
        Me.Button2.Text = "注册"
        '
        'Login
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackgroundImage = CType(resources.GetObject("$this.BackgroundImage"), System.Drawing.Image)
        Me.ClientSize = New System.Drawing.Size(600, 253)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
        Me.MaximizeBox = False
        Me.MaximumSize = New System.Drawing.Size(608, 280)
        Me.MinimumSize = New System.Drawing.Size(608, 280)
        Me.Name = "Login"
        Me.Text = "用户登陆"
        Me.ResumeLayout(False)

    End Sub

#End Region

    



    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        search.init()
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim ds As DataSet
        ds = search.query("select * from T_User where C_UserId = '" & TextBox1.Text & "' ")
        If ds.Tables(0).Rows.Count = 0 Then
            MsgBox("没有该用户", vbOKOnly + vbExclamation, "警告")
            TextBox1.Text = ""
            TextBox2.Text = ""
        Else
            ds.Clear()
            ds = search.query("select * from T_User where C_UserId = '" & TextBox1.Text & "' and C_Password= '" & TextBox2.Text & "'  ")
            If ds.Tables(0).Rows.Count = 0 Then
                MsgBox("    密码错误-_-!!! " & (Chr(13)) & " 请确认后再输入！")
                TextBox2.Text = ""
            Else : Dim Man As New Manager
                UserInfo.UserName = TextBox1.Text
                UserInfo.UserStyle = ds.Tables(0).Rows(0).Item(2)
                UserInfo.Log = Me
                TextBox1.Text = ""
                TextBox2.Text = ""
                Me.Hide()
                Man.Show()

            End If

        End If
    End Sub

    Private Sub Login_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
        If MsgBox("您真的不登录GoodEdu学生信息管理管理系统吗？", _
        MsgBoxStyle.YesNo + MsgBoxStyle.Question, "退出登录系统") _
        = MsgBoxResult.Yes Then
            e.Cancel = False
        Else
            e.Cancel = True
        End If
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim Reg As New Register
        Reg.Show()

    End Sub
End Class