如何打印从WinForms的多个页面？ [英] How do I print multiple pages from WinForms?

问题描述

虽然有网络上的一些教程，我还是输了为什么这不能正确打印多个页面。我在做什么错了？

 公共静态无效printTest（）
 {
 PrintDialog类printDialog1 =新PrintDialog类（）; 
的PrintDocument printDocument1 =新的PrintDocument（）; 
 
 printDialog1.Document = printDocument1; 
 printDocument1.PrintPage + = 
新PrintPageEventHandler（printDocument1_PrintPage）; 
 
 DialogResult的结果= printDialog1.ShowDialog（）; 
如果（结果== DialogResult.OK）
 {
 printDocument1.Print（）; 
} 
} 
 
静态无效printDocument1_PrintPage（对象发件人，PrintPageEventArgs E）
 {
图形图形= e.Graphics; 
 SolidBrush刷=新SolidBrush（Color.Black）; 
 
字体的字体=新的字体（宋体，12）; 
 
 e.PageSettings.PaperSize =新PAPERSIZE（A4，850，1100）; 
 
浮页宽= e.PageSettings.PrintableArea.Width; 
浮动pageHeight = e.PageSettings.PrintableArea.Height; 
 
浮动fontHeight = font.GetHeight（）; 
 INT运行startx = 40; 
 INT startY = 30; 
 INT offsetY = 40; 
 
的for（int i = 0; I< 100;我++）
 {
 graphic.DrawString（行：+ I，字体，画笔，运行startx，startY + offsetY）; 
 offsetY + =（INT）fontHeight; 
 
如果（offsetY> = pageHeight）
 {
 e.HasMorePages = TRUE; 
 offsetY = 0; 
} 
，否则{
 e.HasMorePages = FALSE; 
} 
} 
} 
  

您可以找到的一个例子这段代码的位置打印结果：打印件

解决方案

您从来没有从环路返回。将其更改为：

<预类=郎-CS prettyprint-覆盖> 如果（offsetY> = pageHeight）
{
e.HasMorePages = TRUE;
offsetY = 0;
的回报; //你需要返回，那么它会进入这个功能再次
}
，否则{
e.HasMorePages = FALSE;
}


另外，你需要改变循环在对当前一些启动第2页，而不是再次重新启动我= 0。

Although there are some tutorials on web, I'm still lost on why this doesn't print multiple pages correctly. What am I doing wrong?

public static void printTest()
{
   PrintDialog printDialog1 = new PrintDialog();
   PrintDocument printDocument1 = new PrintDocument();

   printDialog1.Document = printDocument1;
   printDocument1.PrintPage += 
       new PrintPageEventHandler(printDocument1_PrintPage);

   DialogResult result = printDialog1.ShowDialog();
   if (result == DialogResult.OK)
   {
       printDocument1.Print();
   }       
}

static void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
{
   Graphics graphic = e.Graphics;
   SolidBrush brush = new SolidBrush(Color.Black);

   Font font = new Font("Courier New", 12);

   e.PageSettings.PaperSize = new PaperSize("A4", 850, 1100);

   float pageWidth = e.PageSettings.PrintableArea.Width;
   float pageHeight = e.PageSettings.PrintableArea.Height;

   float fontHeight = font.GetHeight();
   int startX = 40;
   int startY = 30;
   int offsetY = 40;

   for (int i = 0; i < 100; i++)
   {             
       graphic.DrawString("Line: " + i, font, brush, startX, startY + offsetY);
       offsetY += (int)fontHeight;

       if (offsetY >= pageHeight)
       {
           e.HasMorePages = true;
           offsetY = 0;
       }
       else {
           e.HasMorePages = false;
       }
   }
}

You can find an example of this code's printed result here: Printed Document

解决方案

You never return from the loop. Change it to:

if (offsetY >= pageHeight)
{
    e.HasMorePages = true;
    offsetY = 0;
    return; // you need to return, then it will go into this function again
}
else {
    e.HasMorePages = false;
}

In addition you need to change the loop to start at the current number on the 2nd page instead of restarting with i=0 again.

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