Svg on opening loads nothing in .NET Core 2.2

[bloodwiing]

Hi, I am using the .NET Core 2.2 and am using the latest NuGet version of the SVG Package (2.4.2),

I am getting no errors when running the code like I saw on other issue reports, but for me the svg's are "empty". I'm trying to load / open an svg and drawing it, but it draws nothing.

I modified my code to save each loaded svg to a png image, this is the result: (The color is black, but that's a windows explorer thing, they're actually empty, but with defined size)

[mrbean-bremen]

.NET Core is not yet supported in 2.4.2 (as you probably know, as you have commented under the respective PR), but hopefully will be in soon.

[bloodwiing]

Ah, so you've seen my comment... Still it's been a really long time since the original author of the pr made any changes, I really hope the conflicts get resolved and bugs get fixed soon to merge! 😄

[mrbean-bremen]

Yeah, I hope so, too... maybe I will resolve the conflicts myself, but I really would like to get a response from the author first.
This issue is basically a duplicate of #400 and #248, hopefully to be resolved soon.

[bloodwiing]

I don't know if I should open a different issue or update this one, but the build which should support the .NET Core 2.2 is still in need of bug fixing...

I ran the published linux app on a Ubuntu emulator (VirtualBox to be specific) and got this error:

System.NullReferenceException: Object reference not set to an instance of an object.
at Svg.SvgDocument.Open[T](String path, Dictionary`2 entities)

I know that it loads the file, because one time I forgot to add it and it said that file wasn't found (or something like that can't remember exactly)

[mrbean-bremen]

Well, this is work in progress, and l haven't done anything apart from conflict resolving and getting the AppVeyor tests running again. I planned to have a closer look this weekend, but I caught a cold and am not really up to it at the moment.
Also, the CI tests are run under Windows only. It would certainly make sense to add Travis.CI tests for Linux and Mac OS. Any help is welcome...

[mrbean-bremen]

So I mostly got rid of the cold and may have another look at this somewhere in the next days, but I know nothing about using .NET Core under Linux. Can you give me some hints about your usage?
You mentioned that you used the published linux app - you mean your own app?

[bloodwiing]

Sorry was off my computer myself 😅, I am trying to load the svg files with specified dimensions. Then I turn that in to a Bitmap object. For the test above I drew them one by one right after they're loaded.

[mrbean-bremen]

Thanks! What I meant was - I have no idea how to setup .NET under Linux, never used that, as I'm working under Windows, though I could give it a try - thus I would like some pointers as how it is commonly used / setup. Also it would make sense to setup unit tests under Linux using Travis.CI later.

That being said, I will be away most of the next week (and I'm still fighting with the aftermath of the virus I caught last week), so I'm not likely to get anything done very soon.

[bloodwiing]

Hope you are feeling better and stronger after the virus ^^

Now I don't have that much experience in C# and the .NET Core, but hope this helps:
• I am loading svgs by using SvgDocument class and Open(string) function.
• The function appears to contain this in it's body > return Open<SvgDocument>(path, null); and that links to a different function Open(string path, Dictionary<string, string> entities) where T : SvgDocument, new()

And that's where the error occurs. Hopefully this is enough to recreate my use?

I know I'm not being that helpful, but I don't know what I could do to help. 😞

[mrbean-bremen]

I'm back and feeling stronger now, thanks ;)
My basic problem is just that I haven't used .NET under Linux, so I just wanted to know how to set up this, but I can find documentation on that myself. Maybe I will have another look at the weekend...

[bloodwiing]

I'm a Windows user myself. I to test if my app works on Linux use VirtualBox. (I don't know if you used VBox before, just in case you haven't here's how to get Linux + .NET Core on it \/)

I've set up a machine for Ubuntu 64bit, launched with a virtual optical disk file with Ubuntu setup.
Once that was done I ran these through the terminal to install the .NET Core

sudo add-apt-repository universe
sudo apt-get install apt-transport-https
sudo apt-get update
sudo apt-get install aspnetcore-runtime-2.2

Once that was done the machine was ready to be used for testing if a .NET Core application published for Linux works ^^

Hope this helps