怎么用SHELL 实现 jpg gif bmp...的显示

[fd]

[ZPoint]

以下文章摘自www.softWonder.com

DLLEXPORT BOOL JMed_DrawImg(CString strFile, CDC *pDC,
CRect rc, BOOL bStretch)
{
IPicture *pPic;
IStream *pStm;

CFileStatus fstatus;
CFile file;
LONG cb;
if (file.Open(strFile,CFile::modeRead) &&
file.GetStatus(strFile, fstatus) &&
((cb = fstatus.m_size) != -1))
{
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);
LPVOID pvData = NULL;
if (hGlobal != NULL)
{
if ((pvData = GlobalLock(hGlobal)) != NULL)
{
file.ReadHuge(pvData, cb);
GlobalUnlock(hGlobal);
CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);

if(SUCCEEDED(
OleLoadPicture(pStm,fstatus.m_size,TRUE,
IID_IPicture,(LPVOID*)&pPic)))
{
OLE_XSIZE_HIMETRIC hmWidth;
OLE_YSIZE_HIMETRIC hmHeight;

pPic->get_Width(&hmWidth);
pPic->get_Height(&hmHeight);

double fX,fY;
fX = (double)pDC->GetDeviceCaps(HORZRES)*
(double)hmWidth/
((double)pDC->GetDeviceCaps(HORZSIZE)*100.0);
fY = (double)pDC->GetDeviceCaps(VERTRES)*
(double)hmHeight/
((double)pDC->GetDeviceCaps(VERTSIZE)*100.0);
int left = rc.left;
int top = rc.top;
int width = rc.Width();
int height = rc.Height();
if (bStretch)
{
if (width == 0) width = (int)fX;
if (height == 0) height = (int)fY;
}
else
{
width = (int)fX;
height = (int)fY;
}
if(FAILED(pPic->Render(*pDC,
left,
top,
width,
height,
0,
hmHeight,
hmWidth,
-hmHeight,
NULL)))
{
AfxMessageBox("Failed To Render The picture!");
return FALSE;
}
pPic->Release();
}
else
{
AfxMessageBox("Error Loading Picture From Stream!");
return FALSE;
}
}
}
}
else
{
AfxMessageBox("Can't Open Image File!");
return FALSE;
}
return TRUE;
}

[Un1]

直接调 Explorer 不行吗？

[long408]

ShellExecute(hWnd,"open","filename", "", "", SW_SHOWMAXIMIZED)

[fd]

ZPoint 你好：
我把你的代码粘贴在我的程序中，结果程序出现了非法操作。
我在onbuttonup中
CDC*pdc=GetDC();
JMed_DrawImg("d:\\a.bmp",pDC,CRect(0,0,100,100),1);

[MMX]

关注！

[ZPoint]

我试过了，没有问题呀？
是不是你的CDC类有问题？
使用时要去掉DLLEXPORT

[fd]

我又试了一次，行了.不知道上次是怎么错的

[sirius]

最简单的办法:
WinExec(
"rundll32.exe shimgvw.dll,ImageView_Fullscreen xxx.jpg", SW_SHOW);