画像の拡張子の取得 [GDI+]

    static CString GetFileExtension(IStreamPtr spSrcStream)

    {

        Status stat = Ok;

        Image* image = new Image(spSrcStream);

        if (image == NULL)

        {

            return CString();

        }

        stat = image->GetLastStatus();

        if (stat != Ok)

        {

            delete image;

            return CString();

        }

        GUID guid;

        stat = image->GetRawformat(&guid);

        if (stat != Ok)

        {

            delete image;

            return CString();

        }

        CString strExt;

        if      (guid == ImageformatBMP)

            strExt = _T(".bmp");

        else if (guid == ImageformatEMF)

            strExt= _T(".emf");

        else if (guid == ImageformatEXIF)

            strExt = _T(".jpg");

        else if (guid == ImageformatGIF)

            strExt = _T(".gif");

        else if (guid == ImageformatIcon)

            strExt = _T(".ico");

        else if (guid == ImageformatJPEG)

            strExt = _T(".jpg");

        else if (guid == ImageformatPNG)

            strExt = _T(".png");

        else if (guid == ImageformatTIFF)

            strExt = _T(".tif");

        else if (guid == ImageformatUndefined)

            strExt = _T(".*");

        else if (guid == ImageformatWMF)

            strExt = _T(".wmf");

        else

            strExt = _T(".*");

        delete image;

        return strExt;

    }