form1.vb

在上课时,老师可以用此软件随机点名,要同学回答问题,排除老师的偏见,显得公平

Imports System.data

Imports System.data.Oledb

Public Class Form1
    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 Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents MainMenu1 As System.Windows.Forms.MainMenu
    Friend WithEvents MenuItem1 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem2 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem3 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem4 As System.Windows.Forms.MenuItem
    Friend WithEvents Timer1 As System.Windows.Forms.Timer
    Friend WithEvents Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.MainMenu1 = New System.Windows.Forms.MainMenu
        Me.MenuItem1 = New System.Windows.Forms.MenuItem
        Me.MenuItem2 = New System.Windows.Forms.MenuItem
        Me.MenuItem3 = New System.Windows.Forms.MenuItem
        Me.MenuItem4 = New System.Windows.Forms.MenuItem
        Me.Timer1 = New System.Windows.Forms.Timer(Me.components)
        Me.Label1 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(208, 112)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(64, 32)
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "开始记时"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(208, 176)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(64, 32)
        Me.Button2.TabIndex = 1
        Me.Button2.Text = "停止记时"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(40, 136)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(64, 32)
        Me.Button3.TabIndex = 2
        Me.Button3.Text = "抽签"
        '
        'MainMenu1
        '
        Me.MainMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem1, Me.MenuItem4})
        '
        'MenuItem1
        '
        Me.MenuItem1.Index = 0
        Me.MenuItem1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem2, Me.MenuItem3})
        Me.MenuItem1.Text = "系统"
        '
        'MenuItem2
        '
        Me.MenuItem2.Index = 0
        Me.MenuItem2.Text = "设置"
        '
        'MenuItem3
        '
        Me.MenuItem3.Index = 1
        Me.MenuItem3.Text = "退出"
        '
        'MenuItem4
        '
        Me.MenuItem4.Index = 1
        Me.MenuItem4.Text = "其他"
        '
        'Timer1
        '
        Me.Timer1.Interval = 500
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("宋体", 50.0!)
        Me.Label1.ForeColor = System.Drawing.SystemColors.Highlight
        Me.Label1.Location = New System.Drawing.Point(72, 24)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(136, 88)
        Me.Label1.TabIndex = 3
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.SystemColors.Control
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Menu = Me.MainMenu1
        Me.Name = "Form1"
        Me.Text = "上课提问"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        wt1 = wt1 - 1
        Label1.Text = wt1 + 1
        If wt1 = -1 Then
            Timer1.Enabled = False
            If MsgBox("时间到了!请问是否随机点一位同学?", MsgBoxStyle.OKCancel = MsgBoxResult.OK) Then

                Dim NoNo As Int16
                NoNo = Int((43 * Rnd()) + 1)
                Dim NoStr As String
                If NoNo < 10 Then
                    NoStr = "0" & CStr(NoNo)
                Else
                    NoStr = CStr(NoNo)
                End If
                MsgBox("请学号为200416032" & NoStr & "的同学回答此问题!")
            End If

        End If
    End Sub

    Private Sub MenuItem2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem2.Click
        Dim set1 As New SettingDig
        set1.Show()
    End Sub

    Private Sub MenuItem3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem3.Click
        Me.Close()
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        'Randomize()
        Dim NoNo As Int16
        NoNo = CInt(Int((43 * Rnd()) + 1))
        Dim conn As New OleDbConnection("provider=microsoft.Jet.Oledb.4.0;Data Source=" & "ts.mdb")
        Dim mycommand As New OleDbCommand("select * from 学生", conn)
        conn.Open()
        Dim myReader As OleDbdataReader
        myReader = mycommand.ExecuteReader()
        While myReader.Read
            If myReader.GetValue(0) = NoNo Then
                MsgBox("恭喜" & myReader.GetValue(1).ToString & "同学，你被抽中了！")
            End If
        End While
        

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ' Randomize()

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        wt1 = WaitTime
        Timer1.Enabled = True
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Timer1.Enabled = False
    End Sub
End Class