dimitrispaxinos

private IDisableableCommand _addCommand;
public IDisableableCommand AddCommand
{
    get
    {
        if (_addCommand == null)
            _addCommand = new DisableableCommandAsync(
            AddCommandHandler,
            obj => true,
            new List<IDisableableCommand>() { RemoveCommand, UpdateCommand });

dimitrispaxinos

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Input;

namespace AsyncDisablingScopeSample
{
    public class DisableableCommandAsync : IDisableableCommand
    {

dimitrispaxinos

/// <summary>
/// DisableableCommandAsync Constructor
/// </summary>
/// <param name="asyncExecute">Executing Delegate</param>
/// <param name="canExecute">Predicate for enabling/disabling</param>
/// <param name="disablables">List of IDisaeable Items to be disabled while executing</param>
/// <param name="disableWhileInProgress">Disable the Command itself while executing</param>
 public DisableableCommandAsync(Func<object,Task> asyncExecute,
               Predicate<object> canExecute,
               IEnumerable<IDisableableCommand> disablables = null,

dimitrispaxinos

using System;
using System.Threading.Tasks;
using System.Windows.Input;

namespace AsyncDisablingScopeSample
{
    public class RelayCommandAsync : ICommand
    {
        #region Fields