各位前輩您們好: 小弟我在使用TPrint列印時,發生一件怪事, 在Printer->BeginDoc()跟Printer->EndDoc()之間,我把六張TChart(寬*長200*120),轉成bitmap(寬*長200*120),再以Printer->Canvas->Copyrect的函式畫在TPrinter上,存bitmap檔時,六張圖檔都會出現,但是在圖形列印時,卻常常會 發生有漏掉圖的情形,幸運的話六張圖都會列印出來,我覺得很迷惑,另外我在程式中,還有其他vector.size()等於25000個左右,是跟記憶體管理有關嗎?以下是我的部分程式碼,請各位前輩看看,謝謝 TPrinter *Prntr = Printer(); Graphics::TBitmap *(m_bmp1[6]); Prntr->BeginDoc(); m_PrntrPosX = 0; m_PrntrPosY = 0; for(int m_iCounter = 0;m_iCounter< 6;m_iCounter ) { m_PrntrPosX = (m_iCounter%3) * 1085//預防蓋住其他圖1000 85 m_PrntrPosY = (m_iCounter/3) * 685//600 85 m_bmp1[m_iCounter] = new Graphics::TBitmap(); m_bmp1[m_iCounter]->Monochrome = false; m_bmp1[m_iCounter]->PixelFormat = pf24bit; m_bmp1[m_iCounter]->Canvas->CopyMode = cmSrcCopy; m_bmp1[m_iCounter]->Canvas->CopyRect(TRect(0,0,m_bmp1[m_iCounter]->Width,m_bmp1[m_iCounter]->Height), Chart1->TeeCreateBitmap(clBlack,Chart1->GetRectangle())->Canvas, Chart1->GetRectangle()); //m_bmp1[m_iCounter]->SaveToFile("檔名"); Prntr->Canvas->CopyMode = cmSrcCopy; Prntr->Canvas->CopyRect(TRect(m_PrntrPosX,m_PrntrPosY,m_PrntrPosX 1000,m_PrntrPosY 600), m_bmp1[m_iCounter]->Canvas,TRect(0,0,200,120)); } Prntr->EndDoc();

各位先進大家好:   由於將TChart轉成bitmap再copy到Printer上發生的bug一直找不到方法解決, 所以小弟改轉成其他方式解決,小弟我是利用TChart函式PrintPartialCanvas 可以在列印工作處理中的時候,傳送所需列印的TChart到Printer上 Printer->BeginDoc(); TChart->PrintPartialCanvas(Printer的Canvas,Printer上的要列印的TRect); Printer->EndDoc(); 這樣就沒有發生漏圖的情形了...