How to insert row at desired index in UITableView Xamarin.ios? - uitableview

Question

i want to add a couple of rows on the index next to the selected row index.
For example if i have clicked row at index 4 i want some rows to added at index 5,6,7. and the actual rows of these indexes shift forward on 8,9,10 etc.

Answer 1

In your table view source MyTableViewSource you have to override RowSelected. In this method, you check your row number and add items to you table view source's Items after adding them, you have to call ReloadData().
class MyTableViewSource : UITableViewSource
{
private readonly UITableView _table;
public List<string> Items { get; }
public MyTableViewSource(UITableView table)
{
_table = table;
Items = new List<string> { "Hello", "World", "Bla", "Foo" };
}
public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
{
var item = Items[indexPath.Row];
var cell = // create cellfor item
return cell;
}
public override nint RowsInSection(UITableView tableview, nint section)
{
return Items.Count;
}
public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
{
if (indexPath.Row == 2)
{
Items.Insert(3, "Horst");
Items.Insert(4, "Klaus");
Items.Insert(5, "Peter");
_table.ReloadData();
}
}
}
Creating them:
var table = new UITableView();
table.Source = new MyTableViewSource(table);
If you want more control over the animation, you can use this version:
public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
{
if (indexPath.Row == 2)
{
_table.BeginUpdates();
Items.Insert(3, "Horst");
Items.Insert(4, "Klaus");
Items.Insert(5, "Peter");
_table.InsertRows(new[] { NSIndexPath.Create(0, 3), NSIndexPath.Create(0, 4), NSIndexPath.Create(0, 5) }, UITableViewRowAnimation.Left);
_table.EndUpdates();
}
}