RowSelected not being called in UITableView in iOS using Xamarin

Question

I am trying to do something when a user touches a row in a UITableView. I am coding for iOS and using Xamarin.

I am assuming that when the user touches a row in the UITableView, and that row is highlighted, that it would mean that the user has just selected a row. So, I figured it made sense to override the RowSelected method in my UITableViewSource. For some reason, though, I can't seem to get that method to ever be called.

Here is my complete UITableViewSource implementation:

public class DeviceSource : UITableViewSource
{
    public event EventHandler<FoundDevice> DeviceSelected;
    private List<FoundDeviceWithInfo> Devices { get; set; }

    public DeviceSource(List<FoundDeviceWithInfo> devices)
    {
        Devices = new List<FoundDeviceWithInfo>(devices);
    }

    public override int RowsInSection(UITableView tableview, int section)
    {
        return Devices.Count;
    }

    public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
    {
        base.RowSelected(tableView, indexPath);

        if (DeviceSelected != null)
        {
            DeviceSelected(tableView, Devices[indexPath.Row].FoundDevice);
        }
    }

    public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
    {
        UITableViewCell cell = tableView.DequeueReusableCell((NSString)indexPath.Row.ToString());

        if (cell == null)
        {
            cell = new DeviceCell(Devices[indexPath.Row].FoundDevice.IpAddress + ":" + Devices[indexPath.Row].FoundDevice.PortNumber,
                              Devices[indexPath.Row].FoundDevice.DeviceName,
                              Devices[indexPath.Row].DeviceCommonInfo != null ? Devices[indexPath.Row].DeviceCommonInfo.Position.AutoGEOTag.Lat : string.Empty,
                              Devices[indexPath.Row].DeviceCommonInfo != null ? Devices[indexPath.Row].DeviceCommonInfo.Position.AutoGEOTag.Long : string.Empty,
                              (NSString)indexPath.Row.ToString()) {UserInteractionEnabled = true};
        }

        return cell;
    }

    public void AddDevice(FoundDeviceWithInfo device)
    {
        if (!Devices.Contains(device))
        {
            Devices.Add(device);
        }
    }

    public void RemoveDevice(FoundDeviceWithInfo device)
    {
        if (Devices.Contains(device))
        {
            Devices.Remove(device);
        }
    }

    public void ClearAllDevices()
    {
        Devices.Clear();
    }
}

Here is where I create my table view and assign it to my DeviceSource:

    _tableView = new UITableView
    {
        ScrollEnabled = true,
        Frame = new RectangleF(10, 74, View.Bounds.Width - 20, View.Bounds.Height - 84),
        AutoresizingMask = UIViewAutoresizing.All,
        Source = new DeviceSource(new List<FoundDeviceWithInfo>()),
        RowHeight = 45
    };

    ((DeviceSource)_tableView.Source).DeviceSelected += DeviceViewController_DeviceSelected;

Here is the method that is supposed to handle when the user selects an item in the list:

void DeviceViewController_DeviceSelected(object sender, ClientCommunication.AutoDiscovery.FoundDevice dev)
{
    UpnpController.GetInfo(dev);
}

The above method is NOT being called when I touch an item in my UITableView. What am I missing here? Am I misunderstanding the concept of 'Selected' in iOS? I am totally new to iOS development and am using Xamarin so I can develop iOS apps using C#.

Thanks in advance for any pointers. I'm sure that I'm just missing some really simple detail, but I can't figure out what it is..

Answer 1

THANK YOU JASON !!!

You nailed it. I was calling the base class and I shouldn't:

public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
{
    base.RowSelected(tableView, indexPath);

    if (DeviceSelected != null)
    {
        DeviceSelected(tableView, Devices[indexPath.Row].FoundDevice);
    }
}

Just needed to remove call to base.RowSelected(..):

public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
{
    if (DeviceSelected != null)
    {
        DeviceSelected(tableView, Devices[indexPath.Row].FoundDevice);
    }
}

Now it works just fine.

Thanks JASON !!!