How to open new view from UITableViewRow button click event?

Question

I want to open the new View Controller from my first view that is Table View Controller.

First View Controller: TableView Controller with Rows. Second View Controller: TableView Controller, Detail View Controller for the selected row on the First Table View Controller.

    using System;
    using System.Collections.Generic;
    using System.Text;
    using Foundation;
    using UIKit;

    namespace TourStops.iOS {

        class TourStopsTableSource : UITableViewSource {
            private List<TourLib.TourStop> _stops;
            NSString _cellID = new NSString("TableCell");
FirstViewController _fvc;
            public TourStopsTableSource(FirstViewController fvc) {
                _stops = TourLib.TourSource.GetAllTourStops();
_fvc = fvc;
            }

            public override nint RowsInSection(UITableView tableview, nint section)
            {
                // tell the TableView how many rows to create
                return _stops.Count;
            }
            public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath) {
                TourLib.TourStop currentTourStop = _stops[indexPath.Row];

                var cell = tableView.DequeueReusableCell(_cellID) as TourStopTableCell;
                if (cell == null) { cell = new TourStopTableCell(_cellID); }


                cell.UpdateCellControlsWithTourData(currentTourStop.Name, currentTourStop.Phone);

                #region SetupMapButton
                string mapUrl = String.Format("http://maps.google.com/maps?q={0}+{1}",
                                                                                    currentTourStop.Latitude,
                                                                                    currentTourStop.Longitude);
                cell.MapButton.TouchUpInside += delegate (object sender, EventArgs e)
                {
                    UIApplication.SharedApplication.OpenUrl(new NSUrl(mapUrl));
                }; 
                #endregion
                cell.CallButton.TouchUpInside += OpenDetailView;

                return cell;
            }

            private void OpenDetailView(object sender, EventArgs e) {
                 var view = new SecondDetailController();
  _parent.NavigationController.PushViewController(view, true);
            }

        }
    }

My FirstViewController Class:

using Foundation;
using System;
using UIKit;

namespace TourStops.iOS
{
    public partial class FirstViewController : UIViewController
    {
        public FirstViewController (IntPtr handle) : base (handle)
        {
        }

        public FirstViewController ()
        {
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            TourStopsTable.Source = new TourStopsTableSource(new FirstViewController ());
        }
    }
}

Answer 1

You need a reference to the NavigationController. There are multiple ways to do this, but one common patter is when you create your Source, pass in a reference to it's parent VC

ViewController _parent;

public TourStopsTableSource(UIViewController parent) {
  _stops = TourLib.TourSource.GetAllTourStops();
  _parent = parent;
}

then, assuming your parent VC is contained within a NavigationController,

private void OpenDetailView(object sender, EventArgs e) {
  var view = new SomeDetailController();
  _parent.NavigationController.PushViewController(view, true);
}

Edit:

In your amended example above, you are doing

TourStopsTable.Source = new TourStopsTableSource(new FirstViewController ());

instead you need to pass a reference to the ALREADY EXISTING VC:

TourStopsTable.Source = new TourStopsTableSource(this);