Random Non-Existent ArgumentNullException given.

[TLC]

Below are the screenshots. Visual Studio 2019 (version 16.16) gives the exception shown, but still proceeds and renders the data without issue. all functionality works. but it gives this error. I've looked through the initVars() code that the Chart() function calls but don't see anything obvious. I don't see anything that could be an obvious cause for ChartView() either.
Also using Steema.TeeChart.NET.Xamarin.Forms version 4.2019.7.3.

Capture1.PNG (30.44 KiB) Viewed 43420 times

Capture.PNG (20.57 KiB) Viewed 43420 times

[Pep]

Hello,
does this happens on specific platform ?

[TLC]

Only in Android. iOS doesn't occur.

[Pep]

Hello,
ok, we've been able to reproduce the problem here. We're investigating what is the cause. Until we found where the problem is and publish a new maintenance release, please get the previous package version from nuget.

Thanks

[Pep]

Hello,
we've just published a new nuget package for the TeeChart for Xamarin.Forms.
Could you please check if this maintenance version fixes the problem?

https://www.nuget.org/packages/Steema.T ... .2019.7.12

[TLC]

This issue still occurs, unfortunately, on version 4.2019.7.12.

However, the other issue https://www.steema.com/support/viewtopi ... =4&t=17188 has been fixed.

[Pep]

Hello,

ok. I need to investigate more about the problem, as it seems that it only happens on specific projects.
Does the following project that you can found at the Steema github it working fine for you ?
https://github.com/Steema/teechart-xama ... RotateTool

It's working fine here.

[TLC]

It works on android with no issues.

Also, I actually don't want any rotation (just pan and zoom) in the graph; how would I do that?

[Pep]

Hello,
we've just uploaded an example at the github, that does this. You can find it here :
https://github.com/Steema/teechart-xama ... anningDemo

[TLC]

Not what I'm looking for, unfortunately. What I'm referring to is when you zoom and rotate the touchpoints and the graph flips over the Y-axis. I want to prevent this from occurring.

[Pep]

Ok, could you please try by setting the ClipPoints property to true ?

Code: Select all

_chartView.Chart.Aspect.ClipPoints = true;

[TLC]

That does seem to help. what does that do?

Also, The ArgumentNullException has stopped occurring, but I'm not sure why. it still occurred after the update and now it is not, using 4.2019.7.12.

[Pep]

That does seem to help. what does that do?

What it does, is to clip the drawing series points to a region, in this case to the Chart rect region.

[TLC]

It started giving the exception again on 4.2019.9.10. It doesn't crash but is reported.

[Pep]

Hello,
ok, thanks for the advise. We're going to do some tests here again with the latest version in order to find what could be the cause.