can not display

Using ![xxx](xxx.jpg)

can`t work well and pictures not display.

[p11h]

This issue has been raised before (see #23 and #30).

If exporting to HTML your example works as expected, so this is only an issue in the viewer or if exporting to PDF.

While it is currently possible to workaround the issue by including the file:/// prefix, I would say that it is non-standard and non-intuitive, and would like the issue to be revisited if possible.

![xxx](file:///xxx.jpg)

Edit: Adding file:/// will work to display in the viewer, but export to HTML or PDF fails to render the image unless the full path is given:

![xxx](file:///xxx.jpg)
![xxx](file:///./xxx.jpg)
![xxx](file:///C:/test/xxx.jpg)

All three of these examples will render in the viewer, but only the final example (with full path) will render in the browser (at least while testing locally).

[patricktokeeffe]

There is already code that attempts to prefix local image paths with “file:///” … https://github.com/nea/MarkdownViewerPlusPlus/blob/1a3dddc525913995bd65b6c7d6a6c11a1c2ca7f3/MarkdownViewerPlusPlus/Forms/MarkdownViewerRenderer.cs#L134

…but it has some issues:

• naively searches for a colon (:) to identify presence of protocol
  • can fail if using local path (e.g. C:\Users\...) because C:\ contains a colon
• uses Path.IsPathRooted [ref?] to determine if file:/// prefix is necessary
  • which will never return true for relative paths (almost certainly the type you are using)

This could be fixed up by using a regular expression to identify protocol prefixes and dumping the IsPathRooted check.

---

FWIW, the current situation has very strange behavior. With an image located in images/ subfolder:

• These formats don’t work:
  • red X
    ![Data acquisition panel](C:\Users\pokeeffe\1D\Projects\PUYALLUPNET%20-%20Vik's%20logger\wsu-puyallup-net-logger\images\daq_panels.jpg)
  • red X
    ![Data acquisition panel](file:///C:\Users\pokeeffe\1D\Projects\PUYALLUPNET%20-%20Vik's%20logger\wsu-puyallup-net-logger\images\daq_panels.jpg)
  • gray stopwatch
    ![Data acquisition panel](C:/Users/pokeeffe/1D/Projects/PUYALLUPNET%20-%20Vik's%20logger/wsu-puyallup-net-logger/images/daq_panels.jpg)
  • gray stopwatch
    ![Data acquisition panel](C:/fake/path/images/daq_panels.jpg)
• But these formats do:
  • ![Data acquisition panel](file:///C:/Users/pokeeffe/1D/Projects/PUYALLUPNET%20-%20Vik's%20logger/wsu-puyallup-net-logger/images/daq_panels.jpg)
  • ![Data acquisition panel](file://images/daq_panels.jpg)
  • ![Data acquisition panel](file:///images/daq_panels.jpg)
  • ![Data acquisition panel](file://///////////////images/daq_panels.jpg)
  • ![Data acquisition panel](C://///////////////images/daq_panels.jpg)
  • ![Data acquisition panel](C:/images/daq_panels.jpg) (not a valid absolute path!)