form1.vb

Visual.Basic.NET实用编程百例-47.6M.zip

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 OleDbConnection1 As System.Data.OleDb.OleDbConnection
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Button1 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.OleDbConnection1 = New System.Data.OleDb.OleDbConnection
        Me.Label1 = New System.Windows.Forms.Label
        Me.Button1 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'OleDbConnection1
        '
        Me.OleDbConnection1.ConnectionString = "Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Registry Path=;Jet OLEDB:Database L" & _
        "ocking Mode=1;Data Source=""F:\luzhb_bak\personal\VB\工作中\第5章程序\实例71如何从数据库中获取单个值\e" & _
        "xample.mdb"";Mode=Share Deny None;Jet OLEDB:Engine Type=5;Provider=""Microsoft.Jet" & _
        ".OLEDB.4.0"";Jet OLEDB:System database=;Jet OLEDB:SFP=False;persist security info" & _
        "=False;Extended Properties=;Jet OLEDB:Compact Without Replica Repair=False;Jet O" & _
        "LEDB:Encrypt Database=False;Jet OLEDB:Create System Database=False;Jet OLEDB:Don" & _
        "'t Copy Locale on Compact=False;User ID=Admin;Jet OLEDB:Global Bulk Transactions" & _
        "=1"
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(16, 40)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(240, 23)
        Me.Label1.TabIndex = 0
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(88, 96)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(100, 30)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "退出"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(272, 133)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.Label1)
        Me.Name = "Form1"
        Me.Text = "从数据库取得值"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Form1_Load(ByVal sender As System.Object, _
                          ByVal e As System.EventArgs) _
                          Handles MyBase.Load
        Dim str As String
        Me.OleDbConnection1.Open()
        Dim ordersCMD As OleDb.OleDbCommand
        ordersCMD = New OleDb.OleDbCommand("SELECT Count(*) FROM 学生信息", Me.OleDbConnection1)
        str = ordersCMD.ExecuteScalar()
        Label1.Text = "表格中共有记录：" & str & "个"
    End Sub

    Private Sub OleDbConnection1_InfoMessage(ByVal sender As System.Object, ByVal e As System.Data.OleDb.OleDbInfoMessageEventArgs) Handles OleDbConnection1.InfoMessage

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        End
    End Sub
End Class