Datagridview bound to Dataset

Hello,

I wonder if someone can help me please?

I have a datagridview bound to a dataset and additions are permitted in the DataGridView.

Assuming that I'm in 'Add Mode' (I'm in a cell of the bottom row) I wish to test the contents of a cell in the new row on exit (from that cell, NOT from the new row). If the test fails, I want the Add to be cancelled.
I want everything in the add row to vanish. I want the grid to go back to the current last existing row. How do I do this please?

My current code for the checking is:

Code:

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Private Sub dgvAccessLevels_CellValidating(sender As Object, e As System.Windows.Forms.DataGridViewCellValidatingEventArgs) Handles dgvAccessLevels.CellValidating
        If (e.ColumnIndex = 2) Then
            Try
                If e.FormattedValue = String.Empty Then
                    xxxxxxxxxxxxx
                    e.Cancel = True
                    Exit Sub
                ElseIf Not IsNumeric(e.FormattedValue) Then
                    MessageBox.Show("Please Enter numeric Value", "Invalid Value", MessageBoxButtons.OK, MessageBoxIcon.Error)
                    dgvAccessLevels.CurrentCell.Value = DBNull.Value
                    xxxxxxxxxxxxx
                    e.Cancel = True
                    Exit Sub
                ElseIf e.FormattedValue > 5 Then
                    MessageBox.Show("Please Enter a Value Between 0 and 5", "Invalid Value", MessageBoxButtons.OK, MessageBoxIcon.Error)
                    dgvAccessLevels.CurrentCell.Value = DBNull.Value
                    xxxxxxxxxxxxx
                    e.Cancel = True
                    Exit Sub
                End If
            Catch ex As Exception
                MessageBox.Show(ex.Message)
            End Try
        End If
    End Sub

---

Basically I want to add the command(s) where the xxxxxxxxxxxxx is to set the grid back to the current last existing row.

Any help would be appreciated.

Thank you.