如何在.NET中翻转/旋转PrintDocument?
问题描述:
我有一个文档,打印时我想翻转180度。 (这是由于打印机中标签纸的方向)。如何在.NET中翻转/旋转PrintDocument?
有一个属性PrintDocument.PrinterSettings.LandscapeAngle
但它是只读的。
我觉得这个属性受打印机驱动程序的影响,因此不是'settable'。
有没有一种很好的方式可以将打印件旋转180度,而不必做太恶劣的事情?
答
我想这取决于你定义为“任何过于肮脏” :-)
的PrintDocument类有一个Graphics对象,你可以使用这个,这反过来又一个TranslateTransform和RotateTransform方法,可以让你得到你需要的东西。
在处理图形对象之前,通常需要获取图形对象的副本,以便在完成后再次将其恢复。
答
是否在将其分配给打印机之前尝试过?GDI是否将图像自行旋转?这就是我所做的:
_currentPage = Image.FromStream((MemoryStream)_queue.Dequeue());
pageHeight = _currentPage.Height;
pageWidth = _currentPage.Width;
if (pageHeight < pageWidth)
{
_currentPage.RotateFlip(RotateFlipType.Rotate90FlipNone);
pageHeight = _currentPage.Height;
pageWidth = _currentPage.Width;
}
答
打印的格式,并翻转/旋转VB.NET化PrintDocument并设置DefaultPageSettings景观
Dim WithEvents mPrintDocument As New PrintDocument
Dim mPrintBitMap As Bitmap
Private Sub m_PrintDocument_PrintPage(ByVal sender As Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles mPrintDocument.PrintPage
mPrintBitMap.RotateFlip(RotateFlipType.Rotate90FlipNone)
mPrintDocument.PrinterSettings.DefaultPageSettings.Landscape = True
' Draw the image centered.
Dim lWidth As Integer = e.MarginBounds.X + (e.MarginBounds.Width - mPrintBitMap.Width) \ 2
Dim lHeight As Integer = e.MarginBounds.Y + (e.MarginBounds.Height - mPrintBitMap.Height) \ 2
e.Graphics.DrawImage(mPrintBitMap, lWidth, lHeight)
' There's only one page.
e.HasMorePages = False
End Sub
Private Sub B_print_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles B_print.Click
' Copy the form image into a bitmap.
mPrintBitMap = New Bitmap(Me.Width, Me.Height)
Dim lRect As System.Drawing.Rectangle
lRect.Width = Me.Width
lRect.Height = Me.Height
Me.DrawToBitmap(mPrintBitMap, lRect)
' Make a PrintDocument and print.
mPrintDocument = New PrintDocument
mPrintDocument.Print()
End Sub
但我想它180度的景观什么的。 – 2009-01-09 21:02:18
难道你不能只是把周围的标签库存? – 2009-01-09 21:55:24