Hi,We have a client using our software. They recently upgraded our software, which meant the version of Infragistics used changed from 13.1.20131.2116 to 15.1.20151.2132. Since upgrading, whenever they run the software on a virtual application server (Windows 2K8R2), any forms using an UltraExpandableGroupBox are frequently displaying with a large red cross, like so:
Do you have any idea what could be causing this? I have looked at the release notes for the latest 15.1 hotfix, but there don't appear to be any relevant fixes.
Thanks,Campbell
Hello Campbell,
Thank you for reaching out. Have you managed to replicate this behavior on a consistent basis? As you may already know the red "X" occurs any time a call is made to a control from another "Background" thread or an exception occurs inside the OnPaint method of a control. Since the controls have been around so long and are so well-used and therefore well-tested, we rarely find bugs in the painting code any more. But it can happen.
If you can reproduce this issue in a small sample project, please post it here and I'll begin to test it immediately. Thanks in advance.
Hi Michael,I feared you'd ask me for a sample. No, we haven't been able to reproduce either - it only occurs on our client's virtual setup, so I suspect it's something to do with the way they have this set up, perhaps not specifying enough resources somewhere. That said, I can't understand why it's an issue in 15.1, but it wasn't in 13.1.Further to this, it only affects the Office2007 theme. If they switch to a different theme (e.g. Visual Studio 2005) then they do not get the issue.Thanks,Campbell
Would you mind letting me know if the issue occurs with my sample attached? Let me know if you have any additional questions as well.
Hello,
While Mike D is creating a sample, would you be able to supply a call stack? It's possible that the call stack might have some information that we can use.
Hi Michael,Directly on the form is an UltraTabControl. The UltraExpandableGroupBox controls sit directly within an UltraTabPageControl, with nothing obstructing them. As each groupbox expands or collapses I rearrange the position of the group below so it always sits just beneath. We have a total of 17 expandable group boxes on this tab.And yes, the GroupBoxPanel renders fine, it's just the UltraExpandableGroupBox throwing the actual exception.Thanks,Campbell
Thank you for following up. I'm fairly close at completing a sample that I need, I just have a couple questions. Are you using a ribbon or tab control to house your expandable groupboxes? Do you have any other panels or controls that the groupboxes may be obstructed by that I may need to be aware of to properly reproduce this? It appears that the groupbox controls are throwing the exception, but not the panels that reside, which contain your controls.
Let me know if you have any additional questions.