' ButtonData1 Example

' Show how columns in a dataset can bind to properties other than Text.

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

    Private c As OleDbConnection
    Private da As OleDbDataAdapter
    Private ds As DataSet
    Private nRows 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 Button1 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button1 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Font = New System.Drawing.Font("Microsoft Sans Serif", 14.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Button1.Location = New System.Drawing.Point(144, 120)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(120, 32)
        Me.Button1.TabIndex = 0
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.Add(Me.Button1)
        Me.Name = "Form1"
        Me.Text = "ButtonData1 Example"
        Me.ResumeLayout(False)

    End Sub

#End Region

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

        c = New OleDbConnection
        c.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
            "Data Source=c:\ButtonData.mdb"
        c.Open()

        Dim s As New OleDbCommand
        s.Connection = c
        s.CommandType = CommandType.Text
        s.CommandText = "SELECT * FROM ButtonTable"

        da = New OleDbDataAdapter
        da.SelectCommand = s

        ds = New DataSet
        nRows = da.Fill(ds, "ButtonTable")

        Button1.DataBindings.Add(New Binding("Left", ds, "ButtonTable.X"))
        Button1.DataBindings.Add(New Binding("Top", ds, "ButtonTable.Y"))
        Button1.DataBindings.Add(New Binding("Text", ds, "ButtonTable.Caption"))
    End Sub

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

        If Me.BindingContext(ds, "ButtonTable").Position >= nRows - 1 Then
            Me.BindingContext(ds, "ButtonTable").Position = 0
        Else
            Me.BindingContext(ds, "ButtonTable").Position += 1
        End If
    End Sub
End Class