c# - 打印位图文件

Question

我编写了代码来捕获屏幕截图并将其保存到 WPF 中的位图文件。

现在我想将位图发送到缩放到打印机页面大小的打印机。

我如何在 WPF 和 C# 中执行此操作？

Answer 1

不询问用户就不能打印(打开打印对话框)

This article用对话框描述如何做到这一点

PrintDialog dialog = new PrintDialog();
if (dialog.ShowDialog() == true)
{ dialog.PrintVisual(_PrintCanvas, "My Canvas"); }

或者你的情况

private void PrintSomethingNew()
{
  PrintDialog dialog = new PrintDialog();
  if (dialog.ShowDialog() != true)
  { return; }

  StackPanel myPanel = new StackPanel();
  myPanel.Margin = new Thickness(15);
  Image myImage = new Image();
  myImage.Width = 128;
  myImage.Stretch = Stretch.Uniform;
  myImage.Source = new BitmapImage(new Uri("C:\\Tree.jpg", UriKind.Absolute));
  myPanel.Children.Add(myImage);
  TextBlock myBlock = new TextBlock();
  myBlock.Text = "A Great Image.";
  myBlock.TextAlignment = TextAlignment.Center;
  myPanel.Children.Add(myBlock);

  myPanel.Measure(new Size(dialog.PrintableAreaWidth,
    dialog.PrintableAreaHeight));
  myPanel.Arrange(new Rect(new Point(0, 0), 
    myPanel.DesiredSize));

  dialog.PrintVisual(myPanel, "A Great Image.");
}