WPF在ViewModel中绑定按钮点击（CommandBase定义）

定义CommandBase

public class CommandBase:ICommand
    {
        private readonly Action<object> _commandpara;
        private readonly Action _command;
        private readonly Func<bool> _canExecute;

        public CommandBase(Action command, Func<bool> canExecute=null)
        {
            if(command==null)
            {
                throw new ArgumentNullException();
            }
            _canExecute = canExecute;
            _command = command;
        }

        public CommandBase(Action<object> commandpara,Func<bool> canExecute=null)
        {
            if(commandpara==null)
            {
                throw new ArgumentNullException();
            }
            _canExecute = canExecute;
            _commandpara = commandpara;
        }

        public bool CanExecute(object parameter)
        {
            return _canExecute == null || _canExecute();
        }
        public event EventHandler CanExecuteChanged
        {
            add { CommandManager.RequerySuggested += value; }
            remove { CommandManager.RequerySuggested -= value; }
        }

        public void Execute(object parameter)
        {
            if (parameter != null)
            {
                _commandpara(parameter);
            }
            else
            {
                if (_command != null)
                {
                    _command();
                }
                else if (_commandpara != null)
                {
                    _commandpara(null);
                }
            }
        }
    }

xaml绑定（带参/不带参）

<Button Command="{Binding CreateButtonCommand}"/>
<Button Command="{Binding CreateButtonCommand}" CommandParameter="参数"/>

ViewModel定义（带参/不带参）

public ICommand CreateButtonCommand { get { return new CommandBase(CreateButton); } }
        private void CreateButton()
        {
            // Command逻辑
        }
        private void CreateButton(object o)
        {
            // Command逻辑
        }