I am trying to creating windows phone 8 project with database (sqlite) techniques
I have tried the following:
1) Download sqlite fie from server & saved it
I can't see any code where you are adding data to a ListBox. If you have data pulled from the database, add it to ItemsSource property that's all.
scheduleListbox.ItemsSource = retrievedTasks;
I do not understand why you use ItemsSource="{Binding}" on selectTeam ListPicker when you fill it in the constructor. And why do you use the same to scheduleListbox. See Binding overview
If you youse empty binding syntax: {Binding}. The ListBox inherits the DataContext from a parent element. When the path is not specified, the default is to bind to the entire object.