Csharp 如何使用.NET6WPF打印车票

您可以通过将LocalProntServer与XpsDocumentWriter一起使用来打印没有PrintDialog的文档.

关于您的代码的一些注释:

• 您应该考虑使用XAML来填充文档.使用C#创建样式和模板非常笨拙.您可以在XAML中定义DataTemplate和ContentControl.将样式添加到ContentControl.Resources字典.所有这些都可以放入一个专用的.xaml文件.DataTemplate定义文档布局，例如TextBlock元素等.您可以使用XamlReader将XAML文本转换为对象，例如将ContentControl标记转换为您可以使用的C#对象.然后将表示文档内容的数据模型分配给ContentControl.Content属性，并直接打印或将其添加到FixedDocument属性.你绝对不应该在C#中创建任何可视化树，尤其是样式和模板.

• IAddChild is an obsolete interface. Don't use it. It could get dropped from the framework any time.
  It's also not necessary to use it as you can simply use the PageContent.Child property:

  //((IAddChild)pageContent).AddChild(fixedPage);
  pageContent.Child = fixedPage;
  

• The positioning using the attached Canvas.Top and Canvas.Left properties is only relevant when the attaching element is the child of a Canvas. Otherwise, it doesn't have any effect on the layout.
  You also should consider to use the attached property accessors:

  //textBlock.SetValue(Canvas.LeftProperty, (double)x);
  Canvas.SetLeft(textBlock, (double)x);
  

如何在没有PrintDialog的情况下打印的示例:

private void PrintDocument(FixedDocument document)
{
  var printServer = new LocalPrintServer();

  /* 
   * Select a destination printer using one of the following methods 
   */

  PrintQueue destinationPrinter;

  // Method 1: filter the list of available printers.
  // For example:
  PrintQueueCollection availablePrinters = printServer.GetPrintQueues();
  destinationPrinter = availablePrinters.First(printQueue => printQueue.Name.Contains("PDF", StringComparison.OrdinalIgnoreCase));

  // Method 2: use the default printer
  destinationPrinter = printServer.DefaultPrintQueue;

  // Method 3: pick a particular printer by name e.g., the native PDF printer
  string printerName = "Microsoft Print to PDF";
  destinationPrinter = printServer.GetPrintQueue(printerName);

  /* 
   * Start the printing 
   */

  // Create a XpsDocumentWriter that writes to the printer queue
  XpsDocumentWriter documentWriter = PrintQueue.CreateXpsDocumentWriter(destinationPrinter);

  // Handle the 'XpsDocumentWriter.WritingCompleted` event 
  // to continue code after writing has been completed.
  // This is an event based asynchronous API.
  documentWriter.WriteAsync(document);
}