Xamarin iOS getting duplicate data for each UITableView section - ios

Question

I am using MvvmCross for my Xamarin iOS project. For my tableview source I have say, a,b,c,d,e,f,g,h records and section(header): 0 of suitable view has 3 records and section: 1 had 4 then
Expected result
Section-0
a
b
c
Section-1
d
e
f
g
I'm getting:
Section-0
a
b
c
Section-1
a
b
c
d
The records are being duplicated. I checked the source but source has correct data.
ISSUE:
At the end of each section the source is restarting from the top again to fill the records
My source:
View:
base.DoBind();
var source = new TableSource<string> (Table, ViewModel);
Table.Source = source;
Table.ReloadData();
Table.AlwaysBounceVertical = false;
var set = this.CreateBindingSet<View, ViewModel>();
set.Bind(source).To(vm => vm.CardsList);
set.Apply();
Cell:
protected override void DoBind()
{
var set = this.CreateBindingSet<Cell, ListViewModel>();
set.Bind(LblNum).To(vm => vm.CardNumber);
set.Bind(Balance).To(vm => vm.Balance);
set.Apply();
}
CellViewModel
public class ListViewModel : MvxViewModel
{
private string _CardNumber;
public string Number
{
get { return _Number); }
set { _CardNumber = value; }
}
private string _Balance;
public string Balance
{
get { _Balance; }
set { _Balance = value; }
}
Can anyone please advice how to resolve this
Update
UITableView _tableView;
public TableSource(UITableView tableView, object item) : base(tableView)
{
this.viewModel = item as ViewModel;
this._tableView = tableView;
tableView.RegisterNibForCellReuse(HeaderCell.Nib, HeaderCell.Key); tableView.RegisterNibForCellReuse(UINib.FromName(Cell.Key, NSBundle.MainBundle), Cell.Key);
tableView.RegisterNibForHeaderFooterViewReuse(UINib.FromName(HeaderCell.Key, NSBundle.MainBundle), HeaderCell.Key);
tableView.ReloadData();
var DataDic = new Dictionary<string, List<string>>
{
{ "section1", new List<string> {}},
{ "section2", new List<string> {}},
{ "section3", new List<string> {}}
};
//create the data
var list = new List<TableModel<string>>();
foreach (var section in DataDic)
{
var sectionData = new TableModel<string>()
{
Title = section.Key
};
foreach (var row in section.Value)
{
sectionData.Add(row);
}
list.Add(sectionData);
}
TableItems = list;
}
public override nint NumberOfSections(UITableView tableView)
{
return TableItems.Count;
}
public override nint RowsInSection(UITableView tableview, nint section)
{
int result = 0;
if (section == 0)
{
result = viewModel.NumOfGiftCards;
}
else if (section == 1)
{
result = viewModel.NumOfRewardsCerts;
}
return result;
}
public override nfloat GetHeightForHeader(UITableView tableView, nint section)
{
return section == 2 ? 0f : 74f;
}
public override nfloat GetHeightForRow(UITableView tableView, NSIndexPath indexPath)
{
return indexPath.Section == 2 ? 95f : 62f;
}
public override IEnumerable ItemsSource
{
get
{
return base.ItemsSource;
}
set
{
base.ItemsSource = value;
_tableView.ReloadData();
}
}
public override UIView GetViewForHeader(UITableView tableView, nint section)
{
var header = tableView.DequeueReusableHeaderFooterView(HeaderCell.Key) as HeaderCell;
return header;
}
protected override UITableViewCell GetOrCreateCellFor(UITableView tableView, NSIndexPath indexPath, object item)
{
var cell = tableView.DequeueReusableCell(Cell.Key, indexPath) as Cell;
return cell;
}
public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
{
viewModel.CardDetailsCommand.Execute(null);
}

Answer 1

I don't think the ItemSource you are binding the CardsList to is not matching up to the TableItems, viewModel.NumOfRewardsCerts or viewModel.NumOfGiftCards that you are using the table source.
Have you had a looked at the MvxExpandableItemSource (the sample is here) It can handle 2 dimensional ItemSources:
private IEnumerable<TItemSource> _itemsSource;
public new IEnumerable<TItemSource> ItemsSource
{
get
{
return _itemsSource;
}
set
{
_itemsSource = value;
_sectionExpandableController.ResetState();
ReloadTableData();
}
}
It deals with expanding and collapsing the from the headers, see below, but you could disable that functionality and force them to be expanded all the time: