这是怎么了? 绘图OnDraw()

[hucailai]

void CJigsawPuzzleView::OnDraw(CDC* pDC)
{
CJigsawPuzzleDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);

CDC *memDC = new CDC;
CBitmap *bitmap;
bitmap=pDoc->m_bitmap;
memDC->CreateCompatibleDC(pDC);
memDC->SelectObject(bitmap);
pDC->StretchBlt(0,0,400,400,memDC,0,0,400,400,SRCCOPY);

// TODO: add draw code for native data here
}

CJigsawPuzzleDoc::CJigsawPuzzleDoc()
{
// TODO: add one-time construction code here
bitmap = new CBitmap();
m_bitmap->m_hObject=(HBITMAP*)::LoadImage(NULL,"d:\\x.bmp",IMAGE_BITMAP,400,400,LR_LOADFROMFILE);//载入位图

}

为什么一重绘,图片就显示不出来了?
错在哪?如何修改?

[jiancaiwang]

没有对视图进行更新，所以不会显示图片。UpdateView

[hucailai1234]

把 loadimage放到OnDraw中去