No text displays in any Infragistics control

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Steve Teller posted over 5 years ago

We have an application that uses Infragistics controls throughout the UI. We use the UltraFormManager for all forms. We used AppStylist to create an isl that we always apply when the app starts. We have deployed the application to hundreds of issues without serious display issues. Recently we deployed to a user and are seeing something very strange. On this particular user's machine the application installed properly but displays no text in any Infragistics control. The only exception appears to be the UltraTextEditor. We see text when entering the username and password on our login screen. When a generic Windows message box is displayed we see text on that. But nowhere else.

This user has 3 monitors at various resolutions and they are using Windows 10 v1809. Their other applications are working fine. We have spent a number of hours logged on to their machine remotely with no success. Of course, I suspect this issue is related to screen resolution and scaling but any changes we have attempted have had no effect.

I know this is a long shot, but is there anything else we might try to fix this issue?

Thanks!

Steve

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Offline Divya Jain posted over 5 years ago

Hello Steve,

Thank you for posting.In order to understand the issue, I have some follow up questions/recommendations to try:

1) What is the screen resolution and scaling of all three screens? Does the issue occur on all three screens?

2) What version of Infragistics for Windows Forms controls are they using?

3) Try turn off the GUI+ and check if it changes the behavior. (You can change this either for individual controls (via the TextRenderingMode property) or the default for all of our controls (using the static DrawUtility.UseGDIPlusTextRendering property).

4) Try to set the focus of the control and see if something highlighted and can you type?

5) Also, try to exclude the isl, may be isl file is setting the forecolor same as the background color.

Looking forward to hear you back.

-Divya Jain
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Offline Steve Teller posted over 5 years ago in reply to Divya Jain
Thanks for your response!

The issue occurs on all three screens. I can't tell you at the moment what the scale and resolution is on each of the screens, but we have tried different scales and resolutions on all of them with no success. We have also tried disconnecting two of the screens, rebooting and just using the main screen alone. Still no success.

We are using version 18.2 if Infragistics for WinForms.

GUI+ has already been turned off by default on all Infragistics controls.

There is a login screen when the app starts, and you can see text in the Infragistics text editor. That is the only Infragistics control in which text appears. The UltraComboEditor appears as a very narrow horizontal rectangle, almost as if there is no font at all by which its size can be calculated.

It did occur to us to try without the isl file, but that file is compiled into the application resources and there is not a way to keep it from loading without recompiling the app.

Again, keep in mind that we have many users with many different configurations, almost all of them with multiple screens and we have never seen this problem before, so we know it's something different about that machine. Our support staff is working with this user, who is not on site, Our user's machine is provided by the IT department at his company. We are in the process of having that IT department provide an additional machine for testing to see if we also have the problem on that machine,

Thanks!

Steve
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