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Red X

Hello, Within our application, users sometimes see a Red x at the location of the dropdown component. Then the application crashes.

This happens randomly, which means that we unfortunately cannot detect it ourselves from Visual Studio if we want to debug this.

We think it is because of the call from another thread:

  if (InvokeRequired)


                 this.Invoke (new MethodInvoker (() =>


                     var sRemoteParty = callHeldEvent.call.remoteParty.GetNameOrAddressValue ();

                     ScavageDropDownItems (callHeldEvent.call.callId);

                     if (! btnResume.Enabled)


                         btnResume.Enabled = true;


                     btnResume.DropDownItems.Add (sRemoteParty, null, RetrieveFromHold) .Tag = callHeldEvent.call;

1 Reply

MJ Mythily Jega Jothi Syncfusion Team November 8, 2019 02:16 PM UTC

Hi Gerard,  
Thank you for contacting Syncfusion Support.  
We have checked the reported issue with ComboDropDown using our simple sample with Windows version 1809 10 OS, but we are unable to reproduce it our end. 
Please provide us the below requested details, it would be helpful for us to proceed on this further.  
  • Windows OS version details.
  • Did you have used any custom fonts in the Combodropdown. If yes, Please convert the Font into TTF format and update us if the reported problem is resolved at your end.
  • Please update if you have used any style in ComboDropDown.
  • If possible,  can you please try our SfComboBox control and update us if the reported problem is resolved at your end.
Please let us know if you need further assistance. 
Mythily J 

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