如何找到打印的页数？ [英] How can I find how many pages printed ?

问题描述

嗨。

我需要一个代码来检查打印机纸张。

例如我打印一个文本文件它将会是3页（s），现在怎么样？我在Windows应用程序中输入了这个3页？

tnx all。

解决方案

你需要能够检查低水平的打印机/队列等



这里有一些可能帮助你入门的链接



http://support.microsoft.com/kb/202480 [ ^ ]



http://support.microsoft.com/kb/228769/EN-US [ ^ ]



他们可能不在vb.net抱歉，但向您展示了您可能需要做的事情

因为这是 System.Windows.Forms 应用程序，通常你需要使用类 System.Drawing.Printing.PrintDocument ：http://msdn.microsoft.com/en-us/library/system.drawing.printing。 printdocument.aspx [ ^ ]。



现在，看看最后的小代码示例。它应该如何打印，特别是如何通过向事件的调用列表添加处理程序来打印页面 System.Drawing.Printing.PrintDocument.PrintPage ，请参阅 http://msdn.microsoft.com/en-us/library /system.drawing.printing.printdocument.printpage.aspx [ ^ ]，

http://msdn.microsoft.com/en-us/library/system.drawing.printing.printpageeventargs.aspx [ ^ ]。



在处理程序的实现中添加一些计数器;并且你已经完成了：

  void  PrintADocument（SomeData someData  / *   ... * / ）{
  //   ...  
 PrintDocument pd =  new  PrintDocument（）; 
  uint  pageCount =  0 ; 
 pd.PrintPage + =（sender，eventArgs）{ //  以lambda形式，参数的确切类型可以 
  //  从事件类型推断 
系统.Drawing.Graphics graphics = eventArgs.Graphics;  //  参见上面的链接 
 RenderThePageUsingTheInstanceOfGraphics（graphics，someData）; 
  //  您要在此页面上呈现的内容 
 pageCount ++; 
};  //   pd.PrintPage handle  
 pd.Print（）; 
  //  此刻，您知道打印了多少页，请阅读pageCount  
  //   ...  
}  //   PrintADocument  

在这段代码中，我也是使用了一个有趣的功能，与匿名方法相关，以及使用堆栈变量 pageCount ，称为 closure 。这很有趣，可以学习。

http://en.wikipedia.org/wiki / Closure_％28computer_science％29 [ ^ ]，

http://en.wikipedia.org/wiki/Anonymous_method [< a href =http://en.wikipedia.org/wiki/Anonymous_methodtarget =_ blanktitle =New Window> ^ ]，

http://en.wikipedia.org/wiki/Anonymous_method#C.23_lambda_expressions [ ^ ]。



< DD> -SA

Hi .
I need a code to check the printer papers out.
for example i print a text document it will 3 page(s), now how can i fount this "3 page(s)" in a windows application?
tnx all.

解决方案

You need to be able to inspect printers/queues etc at a low level

Here''s some link''s that "may" help you get started

http://support.microsoft.com/kb/202480[^]

http://support.microsoft.com/kb/228769/EN-US[^]

They may not be in vb.net sorry, but show you the sorts of things you may have to do

As this is a System.Windows.Forms application, normally you need to use the class System.Drawing.Printing.PrintDocument: http://msdn.microsoft.com/en-us/library/system.drawing.printing.printdocument.aspx[^].

Now, look at the small code sample at the end. It should how to print, and, in particular, how to print a page by adding a handler to the invocation list of the event System.Drawing.Printing.PrintDocument.PrintPage, see http://msdn.microsoft.com/en-us/library/system.drawing.printing.printdocument.printpage.aspx[^],
http://msdn.microsoft.com/en-us/library/system.drawing.printing.printpageeventargs.aspx[^].

Add some counter in the implementation of the handler; and you are done:

void PrintADocument(SomeData someData /* ... */) {
   // ...
   PrintDocument pd = new PrintDocument();
   uint pageCount = 0;
   pd.PrintPage += (sender, eventArgs) { // in lambda form, exact types of the parameters can be
                                         // inferred from the event type
      System.Drawing.Graphics graphics  = eventArgs.Graphics; // see the link above
      RenderThePageUsingTheInstanceOfGraphics(graphics, someData);
            // whatever you want to render on this page
      pageCount++;
   }; // pd.PrintPage handle
   pd.Print();
   // at this moment, you know how many pages are printed, read pageCount 
   // ...
} //PrintADocument

In this code, I also used an interesting feature, related to anonymous methods and the use of the stack variable pageCount, called closure. This is interesting enough to learn.
http://en.wikipedia.org/wiki/Closure_%28computer_science%29[^],
http://en.wikipedia.org/wiki/Anonymous_method[^],
http://en.wikipedia.org/wiki/Anonymous_method#C.23_lambda_expressions[^].

—SA

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