ICommand binding from a TapGestureRecognizer not working

Question

Hi,

I am not able to bind ICommand property to the label

Here is my code:

using Syncfusion.ListView.XForms;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Windows.Input;
using Xamarin.Forms;
using SelectionMode = Syncfusion.ListView.XForms.SelectionMode;

namespace GestureRecognizer
{
    public class TapView : ContentPage
    {
        #region Private constants

        private const int RowHeight = 49;

        #endregion

        #region Binding

        //public static readonly BindableProperty ProductProperty = BindableProperty.Create(
        //    nameof(ProductList), typeof(ObservableCollection<Product>), typeof(ObservableCollection<Product>), null,
        //    BindingMode.OneWay, null, (bindable, oldValue, newValue) =>
        //    {
        //        ((TapView)bindable).ProductList = (ObservableCollection<Product>)newValue;
        //    });

        #endregion
        SfListView listView;


        #region Public properties



        //public ObservableCollection<Product> ProductList
        //{
        //    get => (ObservableCollection<Product>)ItemsSource;
        //    private set
        //    {
        //        ItemsSource = value;
        //    }
        //}

        //private List<TapLookupColumnDefinition> _columnDefinitions = new List<TapLookupColumnDefinition>();
        //public new List<TapLookupColumnDefinition> ColumnDefinitions
        //{
        //    get => _columnDefinitions;
        //    set
        //    {
        //        _columnDefinitions = value;
        //        OnColumnDefinitionsChanged();
        //    }
        //}

        #endregion

        #region Constructors

        public TapView()
        {
            //InitializeComponent();
            TapModel viewModel = new TapModel();
            TapViewModel tapViewModel = new TapViewModel();
            listView = new SfListView();
            List<TapLookupColumnDefinition> ColumnDefinitions = new List<TapLookupColumnDefinition>();

        listView.ItemsSource = viewModel.Products;
            listView.ItemTemplate = new DataTemplate(() =>
            {
                Grid bodyLayout = new Grid
                {
                    ColumnSpacing = 0,
                    RowSpacing = 0,
                    HorizontalOptions = LayoutOptions.FillAndExpand,
                    VerticalOptions = LayoutOptions.FillAndExpand
                };
                bodyLayout.RowDefinitions.Add(new RowDefinition { Height = RowHeight });
                bodyLayout.RowDefinitions.Add(new RowDefinition { Height = 1 });

                Grid checkLayout = new Grid
                {
                    ColumnSpacing = 0,
                    RowSpacing = 0,
                    HorizontalOptions = LayoutOptions.FillAndExpand,
                    VerticalOptions = LayoutOptions.FillAndExpand
                };

                for (int i = 0; i < 4; i++)
                {
                    AddCell(checkLayout.Children, i, nameof(Product.Number));
                }

                Grid.SetRow(checkLayout, 0);
                bodyLayout.Children.Add(checkLayout);

                BoxView separatorBoxView = new BoxView
                {
                    BackgroundColor = Color.Gray,
                    Margin = 0
                };
                Grid.SetRow(separatorBoxView, 1);
                bodyLayout.Children.Add(separatorBoxView);


        // Single tap
        TapGestureRecognizer gestureRecognizer = new TapGestureRecognizer { NumberOfTapsRequired = 1 };
                gestureRecognizer.SetBinding(TapGestureRecognizer.CommandProperty, nameof(TapViewModel.TapCommand));
                gestureRecognizer.SetBinding(TapGestureRecognizer.CommandParameterProperty, ".");
                bodyLayout.GestureRecognizers.Add(gestureRecognizer);

                return bodyLayout;
            });

            Content = listView;
        }


        private static Label CreateLabel(string automationId = null)
        {


            Label label = new Label
            {
                HorizontalTextAlignment = TextAlignment.Center,
                FontSize = 15,
                LineBreakMode = LineBreakMode.WordWrap,
                Margin = new Thickness(10, 0, 10, 0),
                VerticalTextAlignment = TextAlignment.Center,
                AutomationId = automationId,
                HorizontalOptions = LayoutOptions.FillAndExpand,
                VerticalOptions = LayoutOptions.FillAndExpand

            };
            TapGestureRecognizer gestureRecognizer = new TapGestureRecognizer { NumberOfTapsRequired = 1 };
            gestureRecognizer.SetBinding(TapGestureRecognizer.CommandProperty, nameof(TapViewModel.TapCommand));
            gestureRecognizer.SetBinding(TapGestureRecognizer.CommandParameterProperty, ".");
            label.GestureRecognizers.Add(gestureRecognizer);
            return label;
        }

        private static BoxView CreateBoxView(int column, string automationId = null)
        {
            BoxView boxView = new BoxView
            {
                BackgroundColor = column % 2 == 0 ? Color.White : Color.Gray,
                AutomationId = automationId
            };

            return boxView;
        }

        private static Tuple<BoxView, Label> AddCell(ICollection<View> gridChildren, int column,
            string textBindingProperty)
        {
            BoxView cellBoxView = CreateBoxView(column);
            Grid.SetColumn(cellBoxView, column);
            gridChildren.Add(cellBoxView);

            Label cellLabel = CreateLabel(textBindingProperty);
            cellLabel.SetBinding(Label.TextProperty, textBindingProperty);
            //cellLabel.HorizontalOptions = LayoutOptions.FillAndExpand;
            //cellLabel.VerticalOptions = LayoutOptions.FillAndExpand;

            //// Single tap
            //TapGestureRecognizer gestureRecognizer = new TapGestureRecognizer { NumberOfTapsRequired = 1 };
            //gestureRecognizer.SetBinding(TapGestureRecognizer.CommandProperty, nameof(CheckWrapperModel.ClickCommand));
            //gestureRecognizer.SetBinding(TapGestureRecognizer.CommandParameterProperty, ".");
            //cellLabel.GestureRecognizers.Add(gestureRecognizer);

            //// Double tap
            //gestureRecognizer = new TapGestureRecognizer { NumberOfTapsRequired = 2 };
            //gestureRecognizer.SetBinding(TapGestureRecognizer.CommandProperty, nameof(CheckWrapperModel.DoubleTapCommand));
            //gestureRecognizer.SetBinding(TapGestureRecognizer.CommandParameterProperty, ".");
            //cellLabel.GestureRecognizers.Add(gestureRecognizer);




            Grid.SetColumn(cellLabel, column);
            gridChildren.Add(cellLabel);


            return new Tuple<BoxView, Label>(cellBoxView, cellLabel);
        }


        public void DoubleTapCommand(object sender, EventArgs args)
        {

            App.Current.MainPage.DisplayAlert("Login Success", "", "Ok");
            //System.Diagnostics.Debug.WriteLine("<||> NumberOfTapsRequired 1");
        }

    }
}

            #endregion

            #region Private methods

            //private void OnColumnDefinitionsChanged()
            //{


            #endregion



using Syncfusion.ListView.XForms;
    using System;
    using System.Collections.Generic;
    using System.Collections.ObjectModel;
    using System.Windows.Input;
    using Xamarin.Forms;
    using SelectionMode = Syncfusion.ListView.XForms.SelectionMode;

    namespace GestureRecognizer
    {
        public class TapView : ContentPage
        {
            #region Private constants

            private const int RowHeight = 49;

            #endregion

            SfListView listView;

            #endregion

            #region Constructors

            public TapView()
            {
                TapModel viewModel = new TapModel();
                TapViewModel tapViewModel = new TapViewModel();
                listView = new SfListView();

            listView.ItemsSource = viewModel.Products;
                listView.ItemTemplate = new DataTemplate(() =>
                {
                    Grid bodyLayout = new Grid
                    {
                        ColumnSpacing = 0,
                        RowSpacing = 0,
                        HorizontalOptions = LayoutOptions.FillAndExpand,
                        VerticalOptions = LayoutOptions.FillAndExpand
                    };
                    bodyLayout.RowDefinitions.Add(new RowDefinition { Height = RowHeight });
                    bodyLayout.RowDefinitions.Add(new RowDefinition { Height = 1 });

                    Grid checkLayout = new Grid
                    {
                        ColumnSpacing = 0,
                        RowSpacing = 0,
                        HorizontalOptions = LayoutOptions.FillAndExpand,
                        VerticalOptions = LayoutOptions.FillAndExpand
                    };

                    for (int i = 0; i < 4; i++)
                    {
                        AddCell(checkLayout.Children, i, nameof(Product.Number));
                    }

                    Grid.SetRow(checkLayout, 0);
                    bodyLayout.Children.Add(checkLayout);

                    BoxView separatorBoxView = new BoxView
                    {
                        BackgroundColor = Color.Gray,
                        Margin = 0
                    };
                    Grid.SetRow(separatorBoxView, 1);
                    bodyLayout.Children.Add(separatorBoxView);


            // Single tap
            TapGestureRecognizer gestureRecognizer = new TapGestureRecognizer { NumberOfTapsRequired = 1 };
                    gestureRecognizer.SetBinding(TapGestureRecognizer.CommandProperty, nameof(TapViewModel.TapCommand));
                    gestureRecognizer.SetBinding(TapGestureRecognizer.CommandParameterProperty, ".");
                    bodyLayout.GestureRecognizers.Add(gestureRecognizer);

                    return bodyLayout;
                });

                Content = listView;
            }


            private static Label CreateLabel(string automationId = null)
            {


                Label label = new Label
                {
                    HorizontalTextAlignment = TextAlignment.Center,
                    FontSize = 15,
                    LineBreakMode = LineBreakMode.WordWrap,
                    Margin = new Thickness(10, 0, 10, 0),
                    VerticalTextAlignment = TextAlignment.Center,
                    AutomationId = automationId,
                    HorizontalOptions = LayoutOptions.FillAndExpand,
                    VerticalOptions = LayoutOptions.FillAndExpand

                };

                return label;
            }

            private static BoxView CreateBoxView(int column, string automationId = null)
            {
                BoxView boxView = new BoxView
                {
                    BackgroundColor = column % 2 == 0 ? Color.White : Color.Gray,
                    AutomationId = automationId
                };

                return boxView;
            }

            private static Tuple<BoxView, Label> AddCell(ICollection<View> gridChildren, int column,
                string textBindingProperty)
            {
                BoxView cellBoxView = CreateBoxView(column);
                Grid.SetColumn(cellBoxView, column);
                gridChildren.Add(cellBoxView);

                Label cellLabel = CreateLabel(textBindingProperty);
                cellLabel.SetBinding(Label.TextProperty, textBindingProperty);

                Grid.SetColumn(cellLabel, column);
                gridChildren.Add(cellLabel);


                return new Tuple<BoxView, Label>(cellBoxView, cellLabel);
            }

        }
    }

        public class TapViewModel : INotifyPropertyChanged
        {
            public event PropertyChangedEventHandler PropertyChanged = delegate { };

            public ICommand TapCommand { protected set; get; }

    public TapViewModel()
            {
                // configure the TapCommand with a method
                TapCommand = new Command(OnTapped);
            }

            public void OnTapped()
            {
                App.Current.MainPage.DisplayAlert("Login Success", "", "Ok");
            }
        }

I am not able to bind TapViewModel.TapCommand to the bodyLayout.

Please help me with a solution.