ListView binding from static property not working

Question

Hi

I have a typical ListView-bound-to-an-observable-collection setup (code below). However the observable collection (UpcomingJobsList) is a static property coming from a static class (DataService). The OnAppearing on the page with ListView shows that observable collection is loaded with data (screenshot attached). However no data is shown in the ListView (screenshot attached).

What am I doing wrong?

Thanks

Regards

Accepted Answer

Hello,

Welcome to our Microsoft Q&A platform!

Firstly, please add HasUnevenRows="True" to your tag. If records will appear.

If records still do not show it.

Please I do not know what is your Viewmodel's code, I make following steps.

Remove x:DataType="models:UpcomingJobs" in the DataTemplate. keep the HasUnevenRows="True" to your tag, And add ItemsSource for listview, Here is listview's layout.
VerticalOptions="CenterAndExpand"
HorizontalOptions="CenterAndExpand" />

2.I do not know why you changed the BindingContext in the Background, I recomand you to not set two times(bindingContext), set onetime. then binding it.

Here is layout background code. If you dataSource comes from a static class, I will add these data to the LoadingDataViewModel, In the end I binding it

   public partial class Page1 : ContentPage  
       {  
           public Page1()  
           {  
               InitializeComponent();  

               LoadingDataViewModel loadingDataViewModel = new LoadingDataViewModel();  


               foreach (var item in DataService.UpcomingJobsList)  
               {  
                   loadingDataViewModel.JobsList.Add(item);  
               }  
               BindingContext = loadingDataViewModel;  



           }  
       }

Here is LoadingDataViewModel.cs Due to I binding the itemsource for listview, So I add an empty ObservableCollection, when we get the data, I will add data to this ObservableCollection. I add my testMyModel.cs and static DataService.cs.

   public class LoadingDataViewModel{  


           public  ObservableCollection JobsList { get; set; }  
           public LoadingDataViewModel()  
           {  
               JobsList = new ObservableCollection();  
           }  
       }  


       public class MyModel  
       {  
           public string Date1 { get; set; }  

           public string From { get; set; }  

           public string To1 { get; set; }  

           public string Client { get; set; }  
       }  


       public static class DataService  
       {  
           public static ObservableCollection UpcomingJobsList = new ObservableCollection() { new MyModel() { Client="client1", Date1=DateTime.Now.ToString(), From=  DateTime.Now.ToString(), To1= DateTime.Now.ToString() } };  

       }

Here is running screenshot.

Best Regards,

Leon Lu

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ListView binding from static property not working

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