topic GraphicsOverlay Remove Item Randomly Leads To UI Freeze in .NET Maps SDK Questions

GraphicsOverlay Remove Item Randomly Leads To UI Freeze

ofir_bar_tal — Thu, 20 May 2021 10:03:06 GMT

In my project I uses the Esri.ArcGIS.Runtime toolkit for .NET application development. (WPF)

I am using this toolkit for about 2 years now, and recently encountered some kind of unexplained bug.
while using the MapView.GraphicsOverlay[key].Graphics.Remove(itemToRemove) the program freezes.

In my application the map interaction frequency is about 100Hz. (Add/Remove points to GraphicsOverlay)

This happens randomly , and when debugging I have found that the program gets stuck while executing these lines:

public void Remove(long position)
{
IntPtr errorHandle;
CoreVector.CoreRT_vector_remove(this, position, out errorHandle);
GC.KeepAlive(this); <--
InteropCheckError(errorHandle, true, default(GCHandle));
}

since map updates are executed from the main UI thread, it makes the whole program freeze.
and windows 10 labels the program as unresponsive.

can anyone point me to a solution? has anyone encountered this issue before?
Thanks

Re: GraphicsOverlay Remove Item Randomly Leads To UI Freeze

almogelmaliah — Fri, 21 May 2021 07:53:19 GMT

I'm having the same issue, would appreciate any help 🙂

Re: GraphicsOverlay Remove Item Randomly Leads To UI Freeze

MatveiStefarov — Mon, 16 Aug 2021 16:12:17 GMT

Hello! I've been trying to debug this problem, but so far I have not been able to reproduce the freeze. Could you help me narrow down this problem by answering a few questions?

Which version of ArcGIS Runtime are you using?
What GraphicsRenderingMode is used on the overlay -- static or dynamic?
What geometry type do the Graphics have (point, line, polygon, etc)?
Are there any other tasks happening in the background around the time of the freeze (e.g. identify operations, adding/removing layers, changing symbology, resizing the view, etc)?