你好， 我需要能够从我的WPF应用程序打印。我只是想打印交易收据。

Howdy, I need to be able to print from my wpf application. I am just trying to print a transaction receipt.

我发现，使用

PrintDialog pDialog = new PrintDialog();

pDialog.PrintVisu​​al（新收据（事务名称，我的店），documentTitle）;

pDialog.PrintVisual(new Receipt("transaction name","my store"), "documentTitle");

的伎俩非常漂亮。 收据（）是一个用户控件呈现出交易详情。

Does the trick very nicely. "Receipt() is a usercontrol that renders out the transaction details.

你是如何打算这样做吗？这是正确的方法是什么？我该怎么办，如果我不知道将要使用的打印机？我应该做的用户控件只宽热敏收据打印机？

How are you meant to do this? is this the correct way? what do I do if I dont know the printer that is going to be used? should I make the usercontrol only as wide as a thermal receipt printer?

任何建议将是巨大的！

推荐答案

这是我做的打印WPF控件：

This is what I do to print a WPF control:

System.Windows.Controls.PrintDialog printDlg = new System.Windows.Controls.PrintDialog();
if (printDlg.ShowDialog() == true)
{
    System.Printing.PrintCapabilities capabilities = 
       printDlg.PrintQueue.GetPrintCapabilities(printDlg.PrintTicket);

    double scale = Math.Min(
                     capabilities.PageImageableArea.ExtentWidth / control.ActualWidth, 
                     capabilities.PageImageableArea.ExtentHeight / control.ActualHeight);

    control.LayoutTransform = new System.Windows.Media.ScaleTransform(scale, scale);

    Size sz = new Size(capabilities.PageImageableArea.ExtentWidth, 
                       capabilities.PageImageableArea.ExtentHeight);

    control.Measure(sz);
    control.Arrange(new Rect(new Point(capabilities.PageImageableArea.OriginWidth, 
       capabilities.PageImageableArea.OriginHeight), sz));

    printDlg.PrintVisual(control, "My App");
}

这似乎很好地工作。