Items not Updating Inside SFListview

[Spencer Bosley]

Hello,

I am having a problem with my items not updating in the listview when the itemssource updates. I am using INotifyPropertyChanged and it worked just fine before changing to SFListView. ItemSuggestions (IsAcceptedImagePath) is being updated correctly when an item is tapped, but nothing in the listview is changing.

Relevent Code -ViewModel:

Attached

Xaml:

Attached

       

           

               

                   

                       

                           

                               

                                   

                                   

                                   

                               

                               

                                   

                               

                               

                                   

                                   

                               

                               

                           

                           

                       

                   

               

                

           

       

   

       

       

           

               

                   

                       

                           

                               

                                   

                                   

                                   

                               

                               

                                   

                               

                               

                                   

                                   

                               

                               

                           

                           

                       

                   

               

           

           

       

   

       

[Spencer Bosley]

Pictures of code attached in this reply.

Attachment: Pictures_c0f773e5.zip

[Spencer Bosley]

Update - The SfListView does not update the items when .RefreshView() is called on it.

[Lakshmi Natarajan]

Hi Spencer, 

 

Thank you for using Syncfusion products. 

 

We have checked the reported query “Items not Updating Inside SFListview” from our side. We would like to inform you that if you are updating the properties bound to the ItemTemplate at run time, we suggest you to implement the INotifyPropertyChanged for the properties (IsAcceptedImagePath) to reflect the run time updates in the UI. Please refer to the following code snippets for more reference, 

 

    public class Contacts : INotifyPropertyChanged 

    { 

        private ImageSource image;            

        … 

 

        public ImageSource IsAcceptedImagePath 

        { 

            get { return this.image; } 

            set 

            { 

                this.image = value; 

                this.RaisedOnPropertyChanged("IsAcceptedImagePath"); 

            } 

        } 

 

        public event PropertyChangedEventHandler PropertyChanged; 

 

        public void RaisedOnPropertyChanged(string _PropertyName) 

        { 

            if (PropertyChanged != null) 

            { 

                PropertyChanged(this, new PropertyChangedEventArgs(_PropertyName)); 

            } 

        } 

    } 

 

Please refer to our user guidance document regarding the same from the following link,  

UG link: https://help.syncfusion.com/xamarin/listview/getting-started#creating-data-model-for-the-sflistview  

 

We have prepared a sample to update the image at run time and you can find the tested sample in the following link, 

Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/1615281720253564 

 

Additional information: 

Tested device: 

Android – Pixel 3XL Q 10 (Android 10 – API 29) emulator 

iOS – iPhone 12 Pro Max - iOS 14.1 

UWP 

SfListView version: 18.3.0.44 

Xamarin Forms: 4.8.0.1451 

Xamarin: 16.7.000.456 

Xamarin Designer: 16.7.0.495 

Xamarin Templates: 16.7.85 

Xamarin Android SDK: 11.0.2.0 

Xamarin.iOS: 14.1 

Xcode: 12.1 

  

Please check our sample and let us know if you still facing the same issue? if not, please modify our sample and revert us back with the following details which would be helpful for us to check on it and provide you the solution as soon as possible, 

• Share ViewModel and model code snippets
• Share the property update code snippets
• Share device configuration details
• Share Syncfusion and Xamarin.Forms version

 

Regards, 

Lakshmi Natarajan