te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>.net 8.0 - Create thumbnails from ppt slide cross platform in C# - Stack Overflow

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    programmeradmin3浏览0评论

    I want to create thumbnails from ppt slide my code is working on windows but not working on non-Windows OS.

    Please help me with pure cross platform code.

    System.Drawing is not supported for non-Windows OS.

    My code is:

    for (int j = 0; j < pr.Slides.Count; j++)
{
    ISlide sld pr.Slides[j];

    using (Bitmap bmp sld.GetThumbnail (1f, 1f))
    {
         using (MemoryStream ms = new MemoryStream())
         {
             bmp.Save(ms, System.Drawing.Imaging.ImageFormat.png);
             byte[] imageBytes = ms.ToArray();
             string base64String = Convert.ToBase64String(imageBytes);
             slides.Add(new slideModel { SlideNumber = j, SlideImage = base64String });
         }
    }
}

    Please help me with SkiaSharp or any recommended opensource cross platform library.

    I want to create thumbnails from ppt slide my code is working on windows but not working on non-Windows OS.

    Please help me with pure cross platform code.

    System.Drawing is not supported for non-Windows OS.

    My code is:

    for (int j = 0; j < pr.Slides.Count; j++)
{
    ISlide sld pr.Slides[j];

    using (Bitmap bmp sld.GetThumbnail (1f, 1f))
    {
         using (MemoryStream ms = new MemoryStream())
         {
             bmp.Save(ms, System.Drawing.Imaging.ImageFormat.png);
             byte[] imageBytes = ms.ToArray();
             string base64String = Convert.ToBase64String(imageBytes);
             slides.Add(new slideModel { SlideNumber = j, SlideImage = base64String });
         }
    }
}

    Please help me with SkiaSharp or any recommended opensource cross platform library.

    • c#
    • -8.0
    • aspose-slides
    • groupdocs
    Share Improve this question edited Feb 17 at 17:08 marc_s 755k184 gold badges1.4k silver badges1.5k bronze badges asked Feb 17 at 16:07 user24241471user24241471 134 bronze badges
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    1 Answer 1

    Reset to default 0

    You should use Aspose.Slides.NET6.CrossPlatform. Please note that Aspose.Slides.NET6.CrossPlatform requires GLIBC 2.23 and higher for Linux systems. For macOS, the fontconfig package has to be installed. I am working as a support developer at Aspose.

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