C# 向ICommand（C WPF）添加新方法

这是我的助手类，用于我项目中的不同ViewModelClass

public class MOpenFileDialog : ViewModelBase
    {
        #region Properties

        private OpenFileDialog _openDialog;
        public OpenFileDialog Dialog
        {
            get { return _openDialog; }
            set 
            { 
                _openDialog = value;
                RaisePropertyChanged(nameof(Dialog));
            }
        }

        // some other properties

        #endregion

        #region Constructors

        public MOpenFileDialog()
        {            
            OpenFileCommand = new RelayCommand<object>(OpenFile);

            Dialog = new OpenFileDialog()
            {
                FileName = "Documen",
                Filter = "All Files|*.*",
            };
        }


        #endregion

        #region Methods

        public void OpenFile(object param)
        {
           // somecode
        }

        // some other methods

        #endregion

        #region Commands
        public ICommand OpenFileCommand { get; set; }

        #endregion


    }

我想添加另一个方法，在启动openFileCommand时实现， 我做了一次错误的尝试，只是为了解释我想做什么

如有任何帮助，我们将不胜感激。

在以下5个步骤中使用代表：

第一步。创建一个委托。要传递字符串[]字符串数组、文件名数据类型和代码的示例：Opendial.Dialog.Multiselect=true

第二步。使用步骤1中的委托创建事件

第三步。在MOpenFileDialog中随时引发在步骤2中创建的事件

第四步。我不知道你想要什么，但和这个一样

第五步。CollectFilesFolder方法的参数与委托的参数相同

    // 1. Create a delegate. Example you want to pass an string array
    public delegate void OpenFileCommand(string[] fileNames);
    public class MOpenFileDialog : ViewModelBase
    {
        // 2. Create a event using the delegate in step 1
        public event OpenFileCommand OnOpenFileCommand;

        // 3. Raise the event created in step 2 everywhen you want
        public void SomeMethod(string[] fileNames)
        {
            this.OnOpenFileCommand.Invoke(fileNames);
        }

        #region Properties

        private OpenFileDialog _openDialog;
        public OpenFileDialog Dialog
        {
            get { return _openDialog; }
            set 
            { 
                _openDialog = value;
                RaisePropertyChanged(nameof(Dialog));
            }
        }

        // some other properties

        #endregion

        #region Constructors

        public MOpenFileDialog()
        {            
            OpenFileCommand = new RelayCommand<object>(OpenFile);

            Dialog = new OpenFileDialog()
            {
                FileName = "Documen",
                Filter = "All Files|*.*",
            };
        }


        #endregion

        #region Methods

        public void OpenFile(object param)
        {
           // somecode
        }

        // some other methods

        #endregion

        #region Commands
        public ICommand OpenFileCommand { get; set; }

        #endregion
    }

    public class myClassVM : ViewModelBase
    {
        #region Properties

        public MOpenFileDialog Opendial { get; set; }

        #endregion

        #region Constructor

        public CollectNamesVM()
        {
            Opendial = new MOpenFileDialog() { };
            Opendial.Dialog.Multiselect = true;
            // 4. I cant know what do you want here, but Its same as this
            Opendial.OnOpenFileCommand += CollectFilesFolder(Opendial.Dialog.FileNames); // Wrong Way

        }

        #endregion

        #region Methods
        // 5. CollectFilesFolder has params same as the delegate
        public void CollectFilesFolder(string[] fileNames)
        {
            // toDo
        }
    }

---

Execute不是一个事件，它是一个方法，您不能订阅it@PavelAnikhouski我知道，我在寻求一种正确的方法来实现这个想法。请反馈答案和您的结果，继续寻找这个问题的好解决方案，@ExecuteAli@Nguyen，非常感谢你的回答，我要试试，告诉你发生了什么，

    // 1. Create a delegate. Example you want to pass an string array
    public delegate void OpenFileCommand(string[] fileNames);
    public class MOpenFileDialog : ViewModelBase
    {
        // 2. Create a event using the delegate in step 1
        public event OpenFileCommand OnOpenFileCommand;

        // 3. Raise the event created in step 2 everywhen you want
        public void SomeMethod(string[] fileNames)
        {
            this.OnOpenFileCommand.Invoke(fileNames);
        }

        #region Properties

        private OpenFileDialog _openDialog;
        public OpenFileDialog Dialog
        {
            get { return _openDialog; }
            set 
            { 
                _openDialog = value;
                RaisePropertyChanged(nameof(Dialog));
            }
        }

        // some other properties

        #endregion

        #region Constructors

        public MOpenFileDialog()
        {            
            OpenFileCommand = new RelayCommand<object>(OpenFile);

            Dialog = new OpenFileDialog()
            {
                FileName = "Documen",
                Filter = "All Files|*.*",
            };
        }


        #endregion

        #region Methods

        public void OpenFile(object param)
        {
           // somecode
        }

        // some other methods

        #endregion

        #region Commands
        public ICommand OpenFileCommand { get; set; }

        #endregion
    }

    public class myClassVM : ViewModelBase
    {
        #region Properties

        public MOpenFileDialog Opendial { get; set; }

        #endregion

        #region Constructor

        public CollectNamesVM()
        {
            Opendial = new MOpenFileDialog() { };
            Opendial.Dialog.Multiselect = true;
            // 4. I cant know what do you want here, but Its same as this
            Opendial.OnOpenFileCommand += CollectFilesFolder(Opendial.Dialog.FileNames); // Wrong Way

        }

        #endregion

        #region Methods
        // 5. CollectFilesFolder has params same as the delegate
        public void CollectFilesFolder(string[] fileNames)
        {
            // toDo
        }
    }