在PrintPreviewControl上显示PrintDocument的所有页面

Question

I'm having trouble creating multiple pages in a PrintDocument and displaying them within a PrintPreviewControl. I can create a single page easily enough, but stringing together multiple pages is eluding me.

I'm going to eventually draw several pages of stuff using GDI, but I can't get something like this to work as expected.

private PrintDocument doc = new PrintDocument();
private string[] printMe = new string[]{ "page1", "page2", "page3" );
private int pageCount = 0;

private void FormLoad(object sender, EventArgs e)
{
 doc.PrintPage += new PrintPageEventHandler(PrintPage);
 PrintPreviewControl.Document = doc;
}

private void doc_BeginPrint(object sender, PrintEventArgs e){ pageCount = 0; }

private void PrintPage(object sender, PrintPageEventArgs e)
{
 Graphics g = e.Graphics;
 g.DrawString(drawMe[pageCount++], "Lucida Console", Brushes.Black, new Point(20,20));

 e.HasMorePages = (pageCount  printMe.Length );
}

The idea being that 3 separate pages are created, and displayed within the PrintPreview control. What am I missing?

Answer 1

Your code snippet got mangled exactly at the critical point, where you assign e.HasMorePages. There's one glaring problem in your code: you need to implement a BeginPrint event handler to reset the page counter back to 0.

Answer 2

我不确定默认情况下如何显示所有页面，但是可以通过设置“ 属性”窗口的“ 布局”部分中的“ Columns属性和/或“ 属性”窗口中的“ Rows属性来在PrintPreviewControl显示多个页面。 行为部分，其值大于1。