' PhoneBookDB Example

' Input a name, then lookup the phone number in a database.

Imports System.Data.OleDb
Public Class Form1
    Inherits System.Windows.Forms.Form

#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 btnSubmit As System.Windows.Forms.Button
    Friend WithEvents txtName As System.Windows.Forms.TextBox
    Friend WithEvents txtNumber As System.Windows.Forms.TextBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.btnSubmit = New System.Windows.Forms.Button
        Me.txtName = New System.Windows.Forms.TextBox
        Me.txtNumber = New System.Windows.Forms.TextBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'btnSubmit
        '
        Me.btnSubmit.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.btnSubmit.Location = New System.Drawing.Point(16, 152)
        Me.btnSubmit.Name = "btnSubmit"
        Me.btnSubmit.Size = New System.Drawing.Size(208, 32)
        Me.btnSubmit.TabIndex = 0
        Me.btnSubmit.Text = "Get Phone Number"
        '
        'txtName
        '
        Me.txtName.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.txtName.Location = New System.Drawing.Point(16, 16)
        Me.txtName.Name = "txtName"
        Me.txtName.Size = New System.Drawing.Size(208, 26)
        Me.txtName.TabIndex = 1
        Me.txtName.Text = ""
        '
        'txtNumber
        '
        Me.txtNumber.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.txtNumber.Location = New System.Drawing.Point(16, 80)
        Me.txtNumber.Name = "txtNumber"
        Me.txtNumber.Size = New System.Drawing.Size(208, 26)
        Me.txtNumber.TabIndex = 2
        Me.txtNumber.Text = ""
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label1.Location = New System.Drawing.Point(88, 48)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(64, 24)
        Me.Label1.TabIndex = 3
        Me.Label1.Text = "Name"
        '
        'Label2
        '
        Me.Label2.Font = New System.Drawing.Font("Microsoft Sans Serif", 12.0!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label2.Location = New System.Drawing.Point(56, 120)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(128, 24)
        Me.Label2.TabIndex = 4
        Me.Label2.Text = "Phone Number"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(248, 198)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.txtNumber)
        Me.Controls.Add(Me.txtName)
        Me.Controls.Add(Me.btnSubmit)
        Me.Name = "Form1"
        Me.Text = "PhoneNumberDB Example"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Dim c As New OleDbConnection
    Dim sc As OleDbCommand
    Dim da As New OleDbDataAdapter
    Dim ds As New DataSet

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

        c.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
            "Data Source=c:\Database\PhoneNumbers.mdb"
        c.Open()
        sc = c.CreateCommand()
        sc.CommandType = CommandType.Text
        da.SelectCommand = sc
    End Sub

    Private Sub btnSubmit_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles btnSubmit.Click

        Dim n As Integer
        Dim sql As String = "SELECT PhoneNumber FROM PhoneNumbers WHERE " & _
            "Name = '" & txtName.Text & "'"
        sc.CommandText = sql
        n = da.Fill(ds, "PhoneNumbers")
        txtNumber.Text = ds.Tables(0).Rows(0).Item(0)
    End Sub
End Class