Вопрос по wpf, mvvm – Как отменить редактирование объекта с помощью MVVM?

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<TextBox Name="yourTextBox" Text="{BindingPath=YourBinding, UpdateSourceTrigger=Explicit}" />

yourTextBox.GetBindingExpression(TextBox.TextProperty).UpdateSource();

IEditableObjectCustomerBeginEdit / CancelEdit / EndEdit

    internal void Cancel(CustomerWorkspaceViewModel cvm)
    {
        Mainardi.Model.ObjectMapping.Individual dc = cvm.DataContext 
                                 as Mainardi.Model.ObjectMapping.Individual;

        int index = 0;

        if (dc.ContactID > 0 && dc.CustomerID > 0)
        {
            index = _customerCollectionViewModel.List.IndexOf(dc);
            _customerCollectionViewModel.List[index] = 
                                  _customerBAL.GetCustomerById(dc.CustomerID);
        }

        Collection.Remove(cvm);
    }

selectedIndexChange

 public class Usuario : INotifyPropertyChanged
{
    #region "Implementación InotifyPropertyChanged"

    in,ternal void RaisePropertyChanged(string prop)
    {
        if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(prop)); }
    }
    public event PropertyChangedEventHandler PropertyChanged;

    #endregion

    private String _UserName = "Capture su UserName";

    public String UserName
    {
        get { return _UserName; }
        set { _UserName = value; RaisePropertyChanged("UserName"); }
    }

    private String _Password = "Capture su contraseña";

    public String Password
    {
        get { return _Password; }
        set { _Password = value; RaisePropertyChanged("Password"); }
    }

    private String _NombrePersona = "Capture su nombre";

    public String NombrePersona
    {
        get { return _NombrePersona; }
        set { _NombrePersona = value; RaisePropertyChanged("NombrePersona"); }
    }

    // Creates memento 
    public Memento CreateMemento()
    {
        return (new Memento(this));
    }

    // Restores original state
    public void SetMemento(Memento memento)
    {
        this.UserName memento.State.UserName ;
        this.Password = memento.State.Password ;
        this.NombrePersona = memento.State.NombrePersona;
    }

 /// <summary>
/// The 'Memento' class
/// </summary>
public class Memento
{
    //private Usuario _UsuarioMemento;
    private Usuario UsuarioMemento { get; set; }

    // Constructor
    public Memento(Usuario state)
    {
        this.UsuarioMemento = new Usuario();

        this.State.UserName = state.UserName ;
        this.State.Password = state.Password ;
        this.State.NombrePersona = state.NombrePersona ;
    }

    // Gets or sets state
    public Usuario State
    {
        get { return UsuarioMemento; }
    }
}

/// <summary>
/// The 'Caretaker' class
/// </summary>
class Caretaker
{
    private Memento _memento;

    // Gets or sets memento
    public Memento Memento
    {
        set { _memento = value; }
        get { return _memento; }
    }

}

patternCaretaker

Caretaker creadorMemento = new Caretaker();

selectedIndexChangeRaisPropertyChanged

internal void RaisePropertyChanged(string prop)
    {
        if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(prop)); }
        if (prop == "RowIndexSelected") // This is my property assigned to SelectedIndex property of my DataGrid
        {
            if ((this.UserSelected != null) && (creadorMemento .Memento != null))
            {
                this.UserSelected.SetMemento(creadorMemento .Memento);
            }
        }
        if (prop == "UserSelected") // Property UserSelected changed and if not is null we create the Memento Object
        {
            if (this.UserSelected != null)
                creadorMemento .Memento = new Memento(this.UserSelected);
        }
    }

selectedIndexChangedUserSelectedour memento objectSetMemento. And if our UserSelected

SetMementothis.creadorMemento = null.

Order backup = Mapper.Map<Order, Order>(order);