Previous & Next Record

I need to add 'next' and 'previous' buttons toa VB.NET project. I plan to grab the dataset get the current record and possible increment/decrement my way thru them. The table shows a list of customers. After clicking a record a customer details screen appears. This is where I want to add the 'next' and 'previous' buttons.

Any theoretical ideas on how to proceed?

hope this code can help you

read this if this not, ask again ;)

Code:

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Dim intOldRow As Integer
Private Sub Form3_Load(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles MyBase.Load

    ’Populate DataGrid1.
    OleDbDataAdapter1.Fill(DsOrderDetails1, _
        "Order Details")
    DataGrid1.DataSource = _
        DsOrderDetails1.Tables("Order Details")

    ’Position current cell in OrderID column
    ’of the first row and save row position.
    DataGrid1.CurrentCell = New DataGridCell(0, 1)
    intOldRow = DataGrid1.CurrentRowIndex

    ’Reset grid size to show data without horizontal
    ’scrolling and update form size for grid.
    DataGrid1.Size = _
        New System.Drawing.Size(448, DataGrid1.Height)
    Me.Size = New System.Drawing.Size(470, 300)

    ’Set properties for navigation buttons.
    Button1.Height = TextBox1.Height
    Button2.Height = TextBox1.Height
    Button3.Height = TextBox1.Height
    Button4.Height = TextBox1.Height
    Button1.Text = "<<"
    Button2.Text = "<"
    Button3.Text = ">"
    Button4.Text = ">>"

    ’Set properties for Go To record button.
    Button5.Text = "Go to"
    Button5.Size = _
        New System.Drawing.Size(42, TextBox1.Height)

    ’Text and TextAlign property settings for labels
    Label1.Text = "OrderID"
    Label2.Text = "Price"
    Label1.TextAlign = ContentAlignment.MiddleRight
    Label2.TextAlign = ContentAlignment.MiddleRight

    ’Position labels relative to corresponding
    ’text boxes.
    Label1.Height = TextBox2.Height
    Label1.Top = TextBox2.Top - Label1.Height
    Label2.Height = TextBox3.Height
    Label2.Top = TextBox3.Top - Label1.Height

End Sub

Private Sub DataGrid1_CurrentCellChanged( _
    ByVal sender As Object, _
    ByVal e As System.EventArgs) _
    Handles DataGrid1.CurrentCellChanged

    ’Create a pointer for the DataGrid control.
    Dim dg As DataGrid
    dg = DataGrid1

    ’Compute text box display showing current row
    ’relative to total number of rows.
    UpdatePositionIndicator(dg)

    ’Display the OrderID for the current row.
    TextBox2.Text = _
        dg(dg.CurrentCell.RowNumber, 1).ToString
    TextBox2.TextAlign = HorizontalAlignment.Right

    ’Computation throws error if selection is
    ’out of bounds.
    Try
        ’Compute and display extended price for
        ’the current row.
        TextBox3.Text = _
            Format( _
            dg(dg.CurrentCell.RowNumber, 3) * _
            dg(dg.CurrentCell.RowNumber, 4) * _
            (1 - dg(dg.CurrentCell.RowNumber, 0)) _
            , "C").ToString
        TextBox3.TextAlign = HorizontalAlignment.Right
        ’If error is InvalidCastException, reset position
        ’to last valid row; otherwise, display error.
    Catch er As System.InvalidCastException
        dg.CurrentCell = _
            New DataGridCell(intOldRow, _
            dg.CurrentCell.ColumnNumber)
    Catch er As System.Exception
        MsgBox(er.Message & vbCr & er.ToString & _
            vbCr & "Reset row application manually.")
        Exit Try
    Finally
        ’In any event, save row position.
        intOldRow = dg.CurrentRowIndex
    End Try

End Sub

Sub UpdatePositionIndicator(ByVal dg As DataGrid)

    ’Update position display in TextBox1.
    TextBox1.Text = _
        (dg.CurrentCell.RowNumber + 1).ToString & _
        " of " & DsOrderDetails1. _
        Tables("Order Details").Rows.Count
    TextBox1.TextAlign = HorizontalAlignment.Right

End Sub

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

    ’Move to first row and save row position.
    DataGrid1.CurrentRowIndex = 0
    intOldRow = DataGrid1.CurrentRowIndex

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button2.Click

    ’Move backward one row if not already at
    ’first row, and save row position.
    If DataGrid1.CurrentRowIndex > 0 Then
        DataGrid1.CurrentRowIndex -= 1
        intOldRow = DataGrid1.CurrentRowIndex
    End If

End Sub

Private Sub Button3_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button3.Click

    ’Move forward one row if not already at
    ’last row, and save row position.
    If DataGrid1.CurrentRowIndex < DsOrderDetails1. _
        Tables("Order Details").Rows.Count - 1 Then
        DataGrid1.CurrentRowIndex += 1
        intOldRow = DataGrid1.CurrentRowIndex
    End If

End Sub

Private Sub Button4_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button4.Click

    ’Move to last row and save row position.
    DataGrid1.CurrentRowIndex = DsOrderDetails1. _
        Tables("Order Details").Rows.Count - 1
    intOldRow = DataGrid1.CurrentRowIndex

End Sub

Private Sub Button5_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button5.Click

    ’Set pointer for new row value.
    Dim int1 = CInt(TextBox1.Text) - 1

    ’Go to designated row, and save row position or
    ’restore old row position.
    If int1 >= 0 And int1 <= DsOrderDetails1. _
        Tables("Order Details").Rows.Count - 1 Then
        DataGrid1.CurrentRowIndex = int1
        intOldRow = DataGrid1.CurrentRowIndex
    Else
        DataGrid1.CurrentRowIndex = intOldRow
    End If

    ’Compute text box display showing current row
    ’relative to total number of rows.
    UpdatePositionIndicator(DataGrid1)

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The original developer used a 3rd party tool called Infragistics. With it he used an UltraGrid and it seems a little unconventional. Guess I need to dig a little deeper and research this UltraGrid.