Disallow Scroll-Wheel Changing Selected Value

Question

Hello,Is it possible to ignore scrolling when the SfComboBox is not dropped down? I'd like to be able to scroll the list view once it's dropped down but ignore scroll events on top of a non-dropped down SfComboBox. A solution for the built-in ComboBox exists: https://stackoverflow.com/questions/1882993/c-sharp-how-do-i-prevent-mousewheel-scrolling-in-my-combobox Unfortunately this doesn't seem to work with SfComboBoxes. Thank you,Robert van der Leek

Madhumithan Jayapathi · Accepted Answer

Hi Robert,We have analyzed your requirement of "Disable MouseWheel Event when scrolled in SfComboBox". We have logged a feature request for the same. We will implement this feature in our next SP release. We appreciate your patience until then. At the planning stage for every release cycle, we review all open features and identify features for implementation based on specific parameters including product vision, technological feasibility, and customer interest. We will let you know when this feature is implemented.Thank you for requesting this feature and helping us define it. We are always trying to make our products better and feature requests like yours are a key part of our product growth efforts. Feedback link: https://www.syncfusion.com/feedback/46256/disable-mousewheel-event-when-scrolled-in-sfcomboboxIf you have any more specifications/suggestions to the feature request, you can add it as a comment in the portal and cast your vote to make it count.Regards,Madhumithan Jayapathi

Lorna · Answer

Hi,Has this been implemented yet please? I have the same issue as Robert.Kind regardsLorna

Madhumithan Jayapathi · Answer

Hi Lorna,Due to high-priority work, we don’t have an immediate plan to implement this feature right now, but we will implement this feature in any of our upcoming releases. We will let you know when this feature is implemented. We appreciate your patience until then.Regards,Madhumithan Jayapathi

Trieu Nguyen · Answer

Hi, Any update on this?

Priyanka Vijayasankar · Answer

Hi Trieu Nguyen, We are currently
working on this feature and it is in progress. Once the development is
completed, we will inform you as soon as the feature is released. Thank you for
your patience and understanding. Regards,Priyanka Vijayasankar

Anders Linden · Answer

What are the odds, I am searching for this today and finds out that the latest update on this was yesterday! I tried to intercept window messages and other shenanigans, but failed to turn off setting current item with the mouse wheel. I also hope that mouse wheel actions when hovering a sfComboBox will not stop scrolling of the parent control.

Priyanka Vijayasankar · Answer

Hi Anders,Would you kindly verify if the mentioned scenario we described matches the feature we created? If they are not the same, please provide further details about your query and, if possible, share a sample and video for reference.Feedback link: https://www.syncfusion.com/feedback/46256/disable-mousewheel-event-when-scrolled-in-sfcomboboxRegards,Priyanka Vijayasankar

Anders Linden · Answer

Please tell me what you created to prevent changing value when scrolling the parent of a sfComboBox.

I expect a property of the sfComboBox that would prevent that from happening and just let the parent scroll as expected.

Priyanka Vijayasankar · Answer

Hi Trieu Nguyen, We are glad to
inform you that we have provided the feature of "Disable MouseWheel Event
when scrolled in SfComboBox". Feedback link:  https://www.syncfusion.com/feedback/46256/disable-mousewheel-event-when-scrolled-in-sfcombobox We are glad to announce that our Essential Studio 2024
Volume 2 Main Release V26.1.35 is rolled out and is available for download
under the following link.  Essential Studio 2024 Volume 2 Main Release v26.1.35
is available for download | Announcements Forums | Syncfusion We thank you for your support and appreciate your
patience in waiting for this release. Please get in touch with us if you would
require any further assistance. Regards,Priyanka Vijayasankar

Priyanka Vijayasankar · Answer

Hi Anders Linden, Please utilize the
MouseWheel Event to prevent value changes when scrolling the parent of a
sfComboBox by using HandledMouseEventArgs. Please refer the attached sample for
your reference.  We are glad to
inform you that we have provided the feature of "Disable MouseWheel Event
when scrolled in SfComboBox". Feedback link:  https://www.syncfusion.com/feedback/46256/disable-mousewheel-event-when-scrolled-in-sfcombobox We are glad to announce that our Essential Studio 2024
Volume 2 Main Release V26.1.35 is rolled out and is available for download
under the following link.  Essential Studio 2024 Volume 2 Main Release v26.1.35
is available for download | Announcements Forums | Syncfusion We thank you for your support and appreciate your
patience in waiting for this release. Please get in touch with us if you would
require any further assistance. Regards,Priyanka VijayasankarAttachment: MousewheelSfComboBox_68e0ea1c.zip

Trieu Nguyen · Answer

Hi

Priyanka Vijayasankar,Thank you and your team for your hard work. This enhancement will greatly improve the UX of our product.Regards,Trieu Nguyen

Trieu Nguyen · Answer

Hi Priyanka Vijayasankar,

I have implemented your suggestion. When I set DropDownStyle to DropDown, it works as expected, and the SelectedIndex doesn't change when scrolling. However, when I change DropDownStyle to DropDownList and scroll on the ComboBox, an exception is thrown in your DLL:

An unhandled exception of type 'System.StackOverflowException' occurred in Syncfusion.SfListView.WinForms.dllAn unhandled exception of type 'System.StackOverflowException' occurred in Syncfusion.SfListView.WinForms.dll

I'm not sure what is causing this issue. Could you help me investigate it on your side?Thank you!Best regards,Trieu Nguyen

Priyanka Vijayasankar · Answer

Hi Trieu Nguyen,We are able to reproduce the mentioned issue from our side. We will check and update on or before June 14th, 2024. We appreciate your patience until then.Regards,Priyanka Vijayasankar

Trieu Nguyen · Answer

Hi Priyanka Vijayasankar,I hope this message finds you well.After upgrading to version 26.1.35, I've noticed an issue with the SfComboBox dropdown list on high DPI screens (with resolution 250%). Specifically, the item heights are too small, as shown in the attached image.   This issue was not present in the previous version (24.2.3), where the dropdown list worked as expected.Could you please look into this issue and provide a fix at your earliest convenience? Your assistance in resolving this matter promptly would be greatly appreciated.

Additionally, this problem also affects the SfComboBox when it is in MultiSelection mode.

In the meantime, could you assist me in downgrading to the previous version?

Thank you for your support.Best regards,Trieu Nguyen

Priyanka Vijayasankar · Answer

Hi Trieu
Nguyen, We will check and include the fix in the upcoming
weekly NuGet which is scheduled on June 19th, 2024 . We appreciate your
patience until then. Regards,Priyanka
Vijayasankar

Priyanka Vijayasankar · Answer

Hi Trieu Nguyen, We are unable to reproduce the reported issue based on
the given information. Please refer to the attached sample and screenshot provided for
your reference.Could you please share a modified sample that
replicates the issue so that we can better analyze the issue
and provide a solution?  Regards,Priyanka VijayasankarAttachment: MousewheelSfComboBox_9066c1ac.zip

Trieu Nguyen · Answer

Hi Priyanka Vijayasankar,I have tested your sample, and it is working well.

Here is my sample, written in a VSTO Addin. When you run it, please click the "Add-in" tab on the Ribbon bar and click the "Open" button to open the form.You should then change the screen resolution scale to 250% (or possibly smaller, I haven't tested those), the item height in the dropdown becomes too small.This issue was not present in the previous version (24.2.3), where the dropdown list worked as expected.Thank you for your assistance.Best regards,Trieu NguyenAttachment: MouseWheelSfCombobox_359adf17.zip

Priyanka Vijayasankar · Answer

Hi Trieu Nguyen,We are able to reproduce the mentioned issue from your sample. We will check and update on or before June 20th, 2024. We appreciate your patience until then.Regards,Priyanka Vijayasankar

Priyanka Vijayasankar · Answer

Hi Trieu
Nguyen, We have included the
fix for the reported issue in our Weekly NuGet release version 26.1.38 which is
available for download ( https://www.nuget.org/). We thank you for
your support and appreciate your patience in waiting for this update. Please
get in touch with us if you require any further assistance. Regards,Priyanka
Vijayasankar

Priyanka Vijayasankar · Answer

Hi Trieu
Nguyen, We
have confirmed the reported scenario is a defect and logged a report for the
reported scenario, “The height of the items in the dropdown list is too small
when using 250 dpi in the WinForms SfComboBox”. We will fix this issue and
include it in our NuGet release which is scheduled for 9th July, 2024. You can track the
status of this defect using the following feedback link: https://www.syncfusion.com/feedback/58838/the-height-of-the-items-in-the-dropdown-list-is-too-small-when-using-250-dpi-in Please let us know
if you need any further assistance.Note: The provided
feedback link is private, and you need to log in to view this feedback. Disclaimer:
“Inclusion of this solution in the weekly release may change due to other
factors including but not limited to QA checks and works reprioritization.” Regards,Priyanka
Vijayasankar

Trieu Nguyen · Answer

Hi  Priyanka,Thank you for the information!

Trieu Nguyen · Answer

Hi,I would greatly appreciate it if you could send me an update on this.Thank you very much.Best regards,

Priyanka Vijayasankar · Answer

Hi Trieu
Nguyen, We have fixed the
reported issue "The height of the items in the dropdown list is too small
when using 250 dpi in the WinForms SfComboBox" from our end. This patch
can be downloaded from the links below.

Recommended
  approach - exe will perform automatic configuration.
   
  Please find the
  patch setup from the below location:           
  Patch link:
  https://syncfusion.com/Installs/support/patch/26.1.35/1683061/F184097/SyncfusionPatch_26.1.35_1683061_7092024121401221_F184097.exe
   
  Please find the
  patch assemblies alone from the below location:       
     
  Assemblies Link:
  https://syncfusion.com/Installs/support/patch/26.1.35/1683061/F184097/SyncfusionPatch_26.1.35_1683061_7092024121401221_F184097.zip
   
  NuGet link:
  https://syncfusion.com/Installs/support/patch/26.1.35/1683061/F184097/SyncfusionNuget_26.1.35_1683061_7092024121401221_F184097.zip

Assembly Version: 26.1.35 Installation
Directions:         This patch should
replace the files "Syncfusion.SfListView.WinForms” under the following
folder.           $system drive:\
Files\Syncfusion\Essential Studio\$Version
#\precompiledassemblies\$Version#\[TargetFramework]       
   E.g. : $system
drive:\Program Files\Syncfusion\Essential
Studio\26.1.35\precompiledassemblies\26.1.35\4.6To automatically run
the Assembly Manager, please check the Run assembly manager checkbox option
while installing the patch. If this option is unchecked, the patch will replace
the assemblies in precompiled assemblies’ folder only. Then, you must manually
copy and paste them to the preferred location, or you must run the Syncfusion
Assembly Manager application (available from the Syncfusion Dashboard,
installed as a shortcut in the Application menu) to re-install
assemblies.   https://www.syncfusion.com/support/directtrac/patches Disclaimer:           Please note that we
have created this patch for version 26.1.35 specifically to resolve the issue
reported in this incident. If you have received other patches for the same
version for other products, please apply all patches in the order
received.  Please let us know, if you are using any other Syncfusion
version, we will provide patch in your version.  This fix will be
included in our upcoming NuGet release, which is scheduled for 16th July, 2024. Please let us know
if you need any further assistance on this. We will be glad to assist you. Regards,Priyanka
Vijayasankar

Trieu Nguyen · Answer

Hi

Priyanka Vijayasankar,Thank you for your response. I have already upgraded to version 26.1.38 to fix the first issue mentioned above. Could you please send me the patch for version 26.1.38?Thank you!Regards,
Trieu Nguyen

Priyanka Vijayasankar · Answer

Hi Trieu
Nguyen, Sorry, we can only
provide patches in the Main and SP releases. We cannot provide patches in the
weekly releases as you mentioned. This fix will be
included in our upcoming NuGet release, which is scheduled for 16th July, 2024. Regards,Priyanka
Vijayasankar

Priyanka Vijayasankar · Answer

Hi Trieu
Nguyen, We have included the fix for the
reported issue "The height of the items in the dropdown list is too
small when using 250 dpi in the WinForms SfComboBox" in our Weekly NuGet release version
26.1.42 which is available for download ( https://www.nuget.org/).We thank you for your support and
appreciate your patience in waiting for this update. Please get in touch with
us if you require any further assistance.Regards,Priyanka
Vijayasankar