private void Button_Click(object sender, RoutedEventArgs e)
{
PrintDialog dialog = new PrintDialog();
if (dialog.ShowDialog() == true)
{
dialog.PrintVisual(控件名, "Print Test");
}
}
上述方法确实能打印了,但是发现不能居中打印,不能打印多页。
以下是网上找到的方法:(https://www.cnblogs.com/naliang/p/wpfprint.html)
public void print(FrameworkElement ViewContainer)
{
FrameworkElement objectToPrint = ViewContainer as FrameworkElement;
PrintDialog printDialog = new PrintDialog();
printDialog.PrintTicket.PageOrientation = PageOrientation.Landscape;
if ((bool)printDialog.ShowDialog().GetValueOrDefault())
{
Mouse.OverrideCursor = Cursors.Wait;
PrintCapabilities capabilities =
printDialog.PrintQueue.GetPrintCapabilities(printDialog.PrintTicket);
double dpiScale = 300.0 / 96.0;
FixedDocument document = new FixedDocument();
try {
objectToPrint.Width = capabilities.PageImageableArea.ExtentWidth;
objectToPrint.UpdateLayout();
objectToPrint.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
Size size = new Size(capabilities.PageImageableArea.ExtentWidth,
objectToPrint.DesiredSize.Height);
objectToPrint.Measure(size);
size = new Size(capabilities.PageImageableArea.ExtentWidth,
objectToPrint.DesiredSize.Height);
objectToPrint.Measure(size);
objectToPrint.Arrange(new Rect(size));
// Convert the UI control into a bitmap at 300 dpi
double dpiX = 300;
double dpiY = 300;
RenderTargetBitmap bmp = new RenderTargetBitmap(Convert.ToInt32(
capabilities.PageImageableArea.ExtentWidth * dpiScale),
Convert.ToInt32(objectToPrint.ActualHeight * dpiScale),
dpiX, dpiY, PixelFormats.Pbgra32);
bmp.Render(objectToPrint);
// Convert the RenderTargetBitmap into a bitmap we can more readily use
PngBitmapEncoder png = new PngBitmapEncoder();
png.Frames.Add(BitmapFrame.Create(bmp));
System.Drawing.Bitmap bmp2;
using (MemoryStream memoryStream = new MemoryStream())
{
png.Save(memoryStream);
bmp2 = new System.Drawing.Bitmap(memoryStream);
}
document.DocumentPaginator.PageSize =
new Size(printDialog.PrintableAreaWidth, printDialog.PrintableAreaHeight);
// break the bitmap down into pages
int pageBreak = 0;
int previousPageBreak = 0;
int pageHeight =
Convert.ToInt32(capabilities.PageImageableArea.ExtentHeight * dpiScale);