如何在vb.net中的datagridview中打印選定的列？

Question

如何在vb.net中的datagridview中打印選定的列？ 因為我想在vb.net中打印選定的行，所以這些行具有真正的可見性。 這是我在“ PrintDocument1_PrintPage”中的代碼，

With DataGridView1
    Dim fmt As StringFormat = New StringFormat(StringFormatFlags.LineLimit)

    fmt.LineAlignment = StringAlignment.Center
    fmt.Trimming = StringTrimming.EllipsisCharacter

    Dim y As Single = 190
    Do While mRow < .RowCount
        Dim row As DataGridViewRow = .Rows(mRow)
        Dim x As Single = 50
        Dim h As Single = 0
        For Each cell As DataGridViewCell In row.Cells


            Dim rc As RectangleF = New RectangleF(x, y, cell.Size.Width, cell.Size.Height)

            e.Graphics.DrawRectangle(Pens.Black, rc.Left, rc.Top, rc.Width, rc.Height)

            e.Graphics.DrawString(DataGridView1.Rows(cell.RowIndex).Cells(cell.ColumnIndex).FormattedValue.ToString(), .Font, Brushes.Black, rc, fmt)

            x += rc.Width
            h = Math.Max(h, rc.Height)

        Next
        newpage = False
        y += h
        mRow += 1
        If y + h > e.MarginBounds.Bottom Then
            e.HasMorePages = True
            mRow -= 1
            newpage = True
            Exit Sub
        End If
    Loop
    mRow = 0

End With

-我的問題是，即使可見性錯誤，它也會打印datagridview中的所有行。

Answer 1

您沒有檢查該行是否可見。 您可能知道，編程語言可以與不可見的對象進行交互，因此僅因為不可見的對象並不意味着您的代碼將看不到它。

您可能只需要在Do While循環中放置一個條件...

Do WHile mRow < .RowCount
Dim row as DataGridViewRow = .Rows(mRow)
    If row.Visible then
        'blah blah blah
    EndIf
Loop