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<font color="#800080">VC知识库（五）</font>
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<font color="#800080">www.vckbase.com</font>
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直接打印，不需要文档/视
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<small align="center">闻怡洋 译
<a href="mailto:wyy_cq@188.net">wyy_cq@188.net</a>
<a href="http://vchelp.163.net">http://vchelp.163.net</a> </small>
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<p><small><font face="宋体">This article was contributed by </font><a
href="mailto:chrismaunder@codeguru.com"><font face="宋体">Chris
Maunder</font></a><font face="宋体">. </font></small>
</p><p>
<small><font face="宋体">如果你需要在没有使用文档/视图的应用中使用打印功能（比如说在对话框中）你将无法利用MFC提供的功能，而且对于某些新手来讲有些困难。</font></small>
<small><font face="宋体">下面的的代码可以供你在对话框中如果在DOC/View中一样使用打印功能。你必须定义OnBeginPrinting,
OnEndPrinting 和 OnPrint三个函数，其原型和功能与在VIEW中一样。</font></small>
</p><p>
<font face="宋体" size="3"><tt><font color="#0000FF">void</font><font
color="#990000" face="宋体"> CMyDialog::Print() <br>
{<br>
CDC dc;<br>
CPrintDialog printDlg(FALSE);<br>
//利用CPrintDialog 生成打印机设备环境<br>
</font><font color="#0000FF" face="宋体">if</font><font
color="#990000" face="宋体"> (printDlg.DoModal() ==
IDCANCEL) </font><font color="#009900" face="宋体">//
Get printer settings from user</font><font color="#990000"
face="宋体"> 让用户选择打印纸张等<br>
</font><font color="#0000FF" face="宋体">return</font><font
color="#990000" face="宋体">;<br>
<br>
dc.Attach(printDlg.GetPrinterDC()); </font><font
color="#009900" face="宋体">// Attach a printer DC</font><font
color="#990000" face="宋体"> 让HANDLE连接到dc上<br>
</font><font color="#0000FF" face="宋体">dc.m_bPrinting
= TRUE;<br>
<br>
CString strTitle; // Get the application title ?<br>
strTitle.LoadString(AFX_IDS_APP_TITLE);<br>
<br>
DOCINFO di; // Initialise print document details DOCINFO中有相关的打印信息<br>
::ZeroMemory (&di, sizeof (DOCINFO));<br>
di.cbSize = sizeof (DOCINFO);<br>
di.lpszDocName = strTitle;//设置标题<br>
<br>
BOOL bPrintingOK = dc.StartDoc(&di); // Begin a new print job
开始打印<br>
<br>
// Get the printing extents and store in the m_rectDraw field of
a <br>
// CPrintInfo object<br>
CPrintInfo Info;//<br>
Info.m_rectDraw.SetRect(0,0, <br>
dc.GetDeviceCaps(HORZRES), <br>
dc.GetDeviceCaps(VERTRES));//设置范围<br>
<br>
</font><font color="#990000" face="宋体">OnBeginPrinting(&dc,
&Info); </font><font color="#009900" face="宋体">//
调用你自己定义的初始化功能</font><font
color="#990000" face="宋体"><br>
</font><font color="#0000FF" face="宋体">for</font><font
color="#990000" face="宋体"> (UINT page =
Info.GetMinPage(); page<Info.GetMaxPage()&&
bPrintOK;page++)</font><br>
{Info.m_nCurPage = page;<br>
OnPrint(&dc, &Info); <font color="#009900"
face="宋体">// Call your "Print page" function</font><br>
bPrintingOK = (dc.EndPage() > 0); <font
color="#009900" face="宋体">// end page</font><br>
}<br>
OnEndPrinting(&dc, &Info); <font
color="#009900" face="宋体">// 结束打印</font><br>
<br>
<font color="#0000FF" face="宋体">if</font> (bPrintingOK)<br>
dc.EndDoc(); <font color="#009900" face="宋体">//
end a print job</font><br>
<font color="#0000FF" face="宋体">else</font><br>
dc.AbortDoc(); <font color="#009900" face="宋体">//
abort job.</font><br>
<br>
dc.Detach(); <font color="#009900" face="宋体">//
detach the printer DC</font><br>
}</tt></font>
</p>
<p>
<small><font face="宋体">[译者：其实在WINDOWS环境中是设备无关的。只要有了DC，你可以使用各种GDI函数，而不需要理会是在屏幕或是在打印机上绘图。在Windows3.X一般使用CreateDC创建打印环境，在WIN32下好象并不是很兼容，使用CPrintDialog产生打印DC是个不错的方法。你只要看看MFC的源代码就能搞清楚PrintDialog是怎么产生DC的了。</font></small>
<small><font face="宋体">蓝色的代码是讲诉如何初始化打印的参数，而其他的参数你可以在OnBeginPrint中进行设置]</font></small>
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