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Combobox not showing dropdown button

Hello, 


I am sfCombobox to display simple  list but at runtime the combo does not display the dropdown button even though it displays the list correctly 


I have the runtime behavior as well as design time the attached file. 

Thanks for your usual understanding and assistance 


Best Regards 

Paul Aziz 


Attachment: file_fe06efab.rar

12 Replies
TB Thirupathi Bala Krishnan Syncfusion Team August 31, 2021 12:48 PM UTC

Hi Paul,

Thanks for contacting Syncfusion support. 

We have analyzed your reported query “Dropdown button not displayed correctly in SfComboBox”. We prepared a simple sample and then tried to replicate the issue. However, we are unable to replicate the reported issue on our end. 

Please refer the attached videos from the following location: 

Could you please share the following information, 
  • Confirm your syncfusion product version
  • Whether or not high DPI scaling is used.
  • Share the system resolution.
  • faced the issue during initial loading or during runtime changes.

Sample link: https://www.syncfusion.com/downloads/support/forum/168477/ze/GettingStartedDemo1595687290

Could you please share the above details with working sample or modify the attached sample to reproduce the reported issue so that it could be helpful to provide the solution at the earliest.

Regards,
Thirupathi B. 


PA Paul August 31, 2021 01:19 PM UTC

Hello Thirupathi, 


Thanks for the response. 

1. Version: 19.2.0.55

2. Not Using DPI

3. System resolution: 1920x1080

4. Only runtime 


Best Regards 

Paul Aziz 


TB Thirupathi Bala Krishnan Syncfusion Team September 1, 2021 09:53 AM UTC

Hi Paul,

Thanks for sharing the information. 

Could you please provide a working sample or modify our attached sample to reproduce the reported issue. We can easily debug the application using our source code, which allows us to provide a solution as soon as possible. 

Based on your updates, we’ll proceed further. 

Regards,
Thirupathi B. 


PA Paul September 2, 2021 08:19 AM UTC

Hello Thirupathi


Thanks for the response. 


Please find attached 


Strangely, if I create the control on a new form, it displays correctly. 



Best Regards 


Paul Aziz 


Attachment: syncfusion_c855f9a9.rar

PA Paul September 2, 2021 09:04 AM UTC

Hello Thirupathi, 


This is by way information. 


I have just realised the problem with sfCombobox issues nesting. The problem only comes up when it is nested in panel and tablelayout controls 


Thanks

Paul Aziz 



EM Elakkiya Muthukumarasamy Syncfusion Team September 3, 2021 03:15 PM UTC

Hi Paul, 
 
Thanks for your update. 
 
We have checked your provided code. but we could not able to prepare the sample to check this issue. We have received the Error list, while build the code 
 
 
 
 
We have prepared the sample based on your code SfComboBox nested in the panel and TableLayoutPanel. And the Dropdown button displayed correctly in SfComboBox. Please refer the below sample for the same. 
 
 
Please check the above sample and confirm our replication procedure is same as yours.  If not please modify the above sample or share your sample project to reproduce the reported issue. It will be helpful for us to provide the prompt solution on this 
 
Regards, 
Elakkiya 


PA Paul September 4, 2021 09:37 AM UTC

Hello Elakkiya, 

Sorry for the error.


Please find attached 



Best Regards 

Paul Aziz 


Attachment: syncfusion1_2a2b0a41.rar

TB Thirupathi Bala Krishnan Syncfusion Team September 6, 2021 10:47 PM UTC

Hi Paul,

Thanks for providing reproducible sample files.

We were able to reproduce the reported issue in your sample. Meanwhile, we created a simple sample based on your nested structures such as TableLayoutPanel, Panel, GroupBox, and SfComboBox. In this case, we are unable to reproduce the reported issue in our working sample. We are currently validating the reported issue by comparing the code changes to your sample. We will provide additional information on September 8th, 2021.

Sample link: https://www.syncfusion.com/downloads/support/forum/168477/ze/SfComboBoxDemo659096782
 
We appreciate your patience until then.

Regards,
Thirupathi B.

PA Paul September 7, 2021 06:50 AM UTC

Hello Thirupathi, 


Thanks for update


Best Regards 

Paul Aziz 


TB Thirupathi Bala Krishnan Syncfusion Team September 8, 2021 08:39 PM UTC

Hi Paul,

Sorry for the inconvenience caused. 

We are still comparing our working sample to reproducible sample. We need some more time to analyze the problem at our end. So we will provide the further details on 9th September, 2021. We appreciate your patience until then. 

Regards,
Thirupathi B. 


PA Paul September 8, 2021 10:56 PM UTC

Hello Thirupathi, 


Thanks g for update. 


Best Regards 

Paul Aziz 


TB Thirupathi Bala Krishnan Syncfusion Team September 10, 2021 02:05 AM UTC

Hi Paul,

Thanks for your patience.  
 
We compared our working sample to a reproducible sample, and the difference was determined to be the AutoScaleDimensions value. To avoid the DPI issue, we suggested the following guidelines. 
 
·         Always edit/design your apps in default 96 DPI (100%). If you design in 120DPI (125% f.ex) it will get really bad when you go back to 96 DPI to work with it later. 
·         All containers must use the same AutoScaleMode. 
·         Make sure all containers have the below line set in the Designer.cs file: this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); // for design in 96 DP 
For more details, please refer the following link: 
 
Please let us know if you need any further assistance. 
 
Regards,
Thirupathi B. 


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