ViewCell execue command from ViewModel - xamarin.forms

Question

I want to bind my MenuItem from my ViewCell which has a ViewModel.
This is my View cell, Do any one know the proper way do this type of binding?
I have an ObservableCollection<object> that populate my ListView, this the cell I need to bind.
<?xml version="1.0" encoding="UTF-8" ?>
<ViewCell
x:Class="DataTemp.Controls.DeviceViewCell"
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Name="this">
<ViewCell.ContextActions>
// I've been trying these two ways
<MenuItem Command="{Binding Source={x:Reference this}, Path=BindingContext.DeviceCommand}" Text="Call" />
<MenuItem Command="{Binding DeviceCommand}" Text="Call" />
</ViewCell.ContextActions>
<ViewCell.View>
<StackLayout Padding="10">
<Label Text="{Binding Name}" />
<Label Text="{Binding Number}" />
</StackLayout>
</ViewCell.View>
</ViewCell>
Here is my view model
I'm trying to catch the event with a a breakpoint, but i never get into the method OnDeviceCommnad.
public class DeviceViewCellViewModel : BaseViewModel, IDevice
{
public string Number
{
get
{
return _numberDevice;
}
set
{
_numberDevice = value;
OnPropertyChanged("Number");
}
}
public string Name
{
get
{
return _nameDevice;
}
set
{
_nameDevice = value;
OnPropertyChanged("Number");
}
}
public ICommand DeviceCommand { get; set; }
private string _nameDevice;
private string _numberDevice;
public DeviceViewCellViewModel()
{
DeviceCommand = new Command(OnDeviceCommnad);
}
private void OnDeviceCommnad()
{
}
}

Answer 1

If you not need to pass a parameter, the second way should work.
<MenuItem Command="{Binding DeviceCommand}" Text="Call" />
And in Model sample code could as follows:
public Command DeviceCommand { get; private set; }
public DeviceViewCellViewModel()
{
DeviceCommand = new Command(() =>
{
// Execute logic here
});
}
=============================Update==================================
From shared sample, I found that the binded MainViewModel not using DeviceViewCellViewModel, therefore the command will not be invoked.
Modify the folloing code inside MainViewModel:
PaymentsAndDevices.Add(new Devices()
{
Number = rdn.Next().ToString(),
Name = "I'm a device"
});
as follows:
PaymentsAndDevices.Add(new DeviceViewCellViewModel()
{
Number = rdn.Next().ToString(),
Name = "I'm a device"
});
Then OnDeviceCommnad method will be invoked.