subject_15592.htm

一些关于vc的问答

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序号：15592 发表者：wood 发表日期：2002-09-19 16:40:19
<br>主题：请大家帮我看看这段打印位图的程序为什么只走纸却打不出位图呢？
<br>内容：CDC&nbsp;&nbsp;dc;<BR>&nbsp;&nbsp;&nbsp;&nbsp;CPrintDialog printDlg(FALSE);<BR>&nbsp;&nbsp;&nbsp;&nbsp;if (printDlg.DoModal() ==IDOK)<BR>&nbsp;&nbsp;&nbsp;&nbsp;{<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dc.Attach (printDlg.GetPrinterDC());<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;DOCINFO di;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;memset(&di,0,sizeof(DOCINFO));<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;di.cbSize =sizeof(DOCINFO);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;di.lpszDocName ="图象打印";<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CString filename="MONEY.bmp";<BR>&nbsp;&nbsp;&nbsp;&nbsp; HBITMAP bmp=NULL;<BR>bmp=(HBITMAP)LoadImage(NULL,filename,IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CBitmap bitmap;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;bitmap.Attach (bmp);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;BOOL bPrintingOK = dc.StartDoc(&di);<BR>&nbsp;&nbsp;&nbsp;&nbsp;CPrintInfo Info;<BR>&nbsp;&nbsp;&nbsp;&nbsp;Info.m_rectDraw.SetRect(0,0, dc.GetDeviceCaps(HORZRES), dc.GetDeviceCaps(VERTRES));<BR>&nbsp;&nbsp;&nbsp;&nbsp;StartPage(dc);<BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CDC dcMemory;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dcMemory.CreateCompatibleDC(&dc);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dcMemory.SelectObject(bmp);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;BITMAP bm;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;bitmap.GetBitmap(&bm);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>dc.StretchBlt (0,0,bm.bmWidth,bm.bmHeight,&dcMemory,0,0,32,32,SRCCOPY);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;EndPage(dc);<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;EndDoc(dc);<BR>&nbsp;&nbsp;&nbsp;&nbsp;DeleteDC(dcMemory);<BR>&nbsp;&nbsp; dc.Detach ();<BR>&nbsp;&nbsp;&nbsp;&nbsp;}<BR>&nbsp;&nbsp;&nbsp;&nbsp;DeleteDC(dc);<BR>
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回复者：TopLevel 回复日期：2002-09-19 17:00:53
<br>内容：CPrintDialog初始化带参数false时，必须调用CPrintDialog::GetDefaults( );<BR>
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回复者：wood 回复日期：2002-09-19 17:06:00
<br>内容：我已经有printDlg.GetPrinterDC());了呀！
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<font color=red>答案被接受</font><br>回复者：TopLevel 回复日期：2002-09-19 17:23:51
<br>内容：首先保证你上面的每步是否成功。<BR>如果没有问题，还是出不来的话；<BR>可能是映射模式的问题，或dc.StretchBlt (0,0,bm.bmWidth,bm.bmHeight,&dcMemory,0,0,32,32,SRCCOPY);<BR>这句话不当。<BR>你可以换成一段文字，测试一下，看是否能出来。<BR>可以用这个试一下。<BR>dc.StretchBlt (0,0,dc.GetDeviceCaps(HORZRES), dc.GetDeviceCaps(VERTRES),&dcMemory,0,0,bm.Width,bm.bmHeight,SRCCOPY);<BR><BR>仅供参考。<BR>
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