Question

    <StackPanel Orientation="Horizontal" Margin="10 10 0 0" Name="deluxestack">
        <Button Background="LightGreen" Command="{Binding Status}" CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=Content}"  Width="30" Height="30"  Content="1"/>
        <Button Background="LightGreen" Command="{Binding Status}"  CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=Content}" Width="30" Height="30"  Content="2" Margin="10 0 0 0"/>
        <Button Background="LightGreen" Command="{Binding Status}" CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=Content}"  Width="30" Height="30"  Content="3" Margin="10 0 0 0"/>
    </StackPanel>

以上是我的代码..如何在我的viewmodel中访问这些按钮参数值（按钮的内容）？

编辑：ViewModel

public class ViewModel {
    public ViewModel() {
      Status = new MyCommand<int>(Receive);
    }
    public ICommand Status {
      get; set;
    }
    private void Receive(int obj) {
      //what should i write here?? 
    }
  }

Answer 1

您可以在命令中将传递的命令参数作为对象。

在这样的视图模型中处理命令。

Status = new RelayCommand(OnbuttonClick, param => true);

现在添加处理程序如下：

private void OnbuttonClick(object obj)
{
   var btnContent = obj.ToString();
}

btnContent 可能是传递的参数。

编辑： 添加了RelayCommand Class

的示例

using System;
using System.Windows.Input;

namespace WpfApplication1
{
    public class RelayCommand : ICommand
    {
        private Action<object> execute;
        private Func<object, bool> canExecute;
        private Action<int> receive;
        private Func<object, bool> p;

        public event EventHandler CanExecuteChanged
        {
            add { CommandManager.RequerySuggested += value; }
            remove { CommandManager.RequerySuggested -= value; }
        }

        public RelayCommand(Action<object> execute, Func<object, bool> canExecute = null)
        {
            this.execute = execute;
            this.canExecute = canExecute;
        }

        public bool CanExecute(object parameter)
        {
            return this.canExecute == null || this.canExecute(parameter);
        }

        public void Execute(object parameter)
        {
            this.execute(parameter);
        }
    }
}

访问按钮命令视图模型中的参数值

1 个答案: