Add item in ViewModel not update listview UI

Question

Hi, since version 18.1.0.48 when I update my nuget all my Views with sflistview not refresh and not show items after insert in collection from ViewModel. I think was a bug temporary so wait for correction. Today I spend a time creating a test project e comparing and find a problem.

Problem:

Don't instance Page in another thread, my old code

var page = await Task.Run(t => new MyPage());

Solution:

Create always Page in main thread

var page = new MyPage();

Hope this can help someone. English is not my first language :)

SaiGanesh Sakthivel · Answer

Hi Gabriel,  
  
Thank you for contacting syncfusion support.  
  
We have checked the reported query “Add item in ViewModel not update listview UI” from our end. We would like to inform that we could not able to replicate the reported scenario from our end. We have attached the tested sample in the following link for your reference.  
  
Link: https://www.syncfusion.com/downloads/support/directtrac/general/ze/ListViewXamarin-724490551  
  
Please let us know it you still facing the same issue. If not, could you please share the following details which would be helpful for us to check on it and provide you the solution at the earliest.   
  
·       Modify our sample / Share layouts used in Xaml page.  
·       Model and viewmodel used in the project.  
·       Procedure to replicate the issue.  
·       Share the Syncfusion version.  
Regards, SaiGanesh Sakthivel

gabriel de sousa · Answer

Hi, I send you my sample. To reproduce the problem create a new page with sflistview in another thread. I put TODO in my sampleAttachment: App1_26cf8c0.rar

SaiGanesh Sakthivel · Answer

Hi Gabriel,  
  
Thank you for the update.  
  
#Regarding Add item in ViewModel not update listview UI  
We would like to inform you that as per implementation, the ListView UI will be updated in the MainThread. Hence, running the page which has ListView in separate thread is not the recommended process.  
  
Regards,  
SaiGanesh Sakthivel