MFC打印预览正常，打印出来的却很大。求该如何解决呢？谢谢了

[cj392171215]

void CGeneratorView::OnDraw(CDC* pDC)
{
CGeneratorDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if(!dcMem->m_hDC)
{
dcMem->Detach();
dcMem->CreateCompatibleDC(pDC);
if(pBitmap)
pBitmap->Detach();
pBitmap->CreateCompatibleBitmap(pDC, picWidth, picHeight);
dcMem->SelectObject(pBitmap);
dcMem->SelectStockObject(WHITE_BRUSH);
dcMem->SelectStockObject(WHITE_PEN);
CRect rc;
this->GetClientRect(rc);
dcMem->Rectangle(rc.left, rc.top, rc.Width(), rc.Height());
}
CBitmap *m_bmp=dcMem->GetCurrentBitmap();
Graphics graphics( pDC->m_hDC);
Bitmap mbitmap(HBITMAP(*m_bmp),NULL);//从CBitmap对象中得到HBitmap
if(picPosX!=m_oldpicPosX||picPosY!=m_oldpicPosY)
{
graphics.TranslateTransform(picWidth/2+picPosX,picHeight/2+picPosY); // 将原点移动到(82,100)
}
graphics.RotateTransform(m_d); // 旋转m_d度
graphics.DrawImage(&mbitmap,-picWidth/2,-picHeight/2,picWidth,picHeight);
}

void CGeneratorView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{

CView::OnPrepareDC(pDC, pInfo);
pDC->SetMapMode(MM_ANISOTROPIC); //转换坐标映射方式
CSize size = CSize(800, 560);

pDC->SetWindowExt(size);//确定窗口大小 //得到实际设备每逻辑英寸的象素数量

int xLogPixPerInch = pDC-> GetDeviceCaps(LOGPIXELSX
int yLogPixPerInch = pDC->GetDeviceCaps(LOGPIXELSY);//得到设备坐标和逻辑坐标的比例 long xExt = (long)size.cx * xLogPixPerInch/96 ;//800
long yExt = (long)size.cy * yLogPixPerInch/96 ;//560
pDC->SetViewportExt((int)xExt, (int)yExt);//
}

[cj392171215]

希望各路大神们前来帮助小弟啊。不会的也来顶顶了，谢谢啦

[cj392171215]

就不信没人来

[cj392171215]

就不信没人来

[zhoujk]

你单步检查一下打印输出之前的参数，应该是单位不对造成的。