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 }