将参数传递给 ICommand [英] Passing a parameter to ICommand

问题描述

我有一个简单的按钮，在执行时使用命令，这一切正常，但我想在单击按钮时传递一个文本参数.

I have a simple button that uses a command when executed, this is all working fine but I would like to pass a text parameter when the button is clicked.

我认为我的 XAML 没问题，但我不确定如何编辑我的 RelayCommand 类以接收参数:

I think my XAML is ok, but I'm unsure how to edit my RelayCommand class to receive a parameter:

<Button x:Name="AddCommand" Content="Add" 
    Command="{Binding AddPhoneCommand}"
    CommandParameter="{Binding Text, ElementName=txtAddPhone}" />

public class RelayCommand : ICommand
{
    private readonly Action _handler;
    private bool _isEnabled;

    public RelayCommand(Action handler)
    {
        _handler = handler;
    }

    public bool IsEnabled
    {
        get { return _isEnabled; }
        set
        {
            if (value != _isEnabled)
            {
                _isEnabled = value;
                if (CanExecuteChanged != null)
                {
                    CanExecuteChanged(this, EventArgs.Empty);
                }
            }
        }
    }

    public bool CanExecute(object parameter)
    {
        return IsEnabled;
    }

    public event EventHandler CanExecuteChanged;

    public void Execute(object parameter)
    {
        _handler();
    }
}

推荐答案

将 Action 更改为 Action 以便它接受一个参数(可能只是 Action