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这与此处描述的问题相同，从另一个窗口刷新组合框列表，但我有一个 ListView 而不是 ComboBox。我使用了与上面链接中描述的相同的方法，但它不能正常工作。我的 ListView 有 6 列，它绑定到 MVVM 属性（“Bookings”）。现在，这些列从 3 个不同的数据库表中获取数据。添加新的预订后，只有从表“tblBookings”中获取数据的列填充了值，并且没有从该表中获取数据的列是空的，直到我重新启动我的窗口。这是代码：

预订视图模型：

private bool isBookingSaved;
    public bool IsBookingSaved
    {
        get
        {
            return isBookingSaved;
        }
        set
        {
            isBookingSaved = value;
            OnPropertyChanged("IsBookingSaved");
        }
    }

 private string type;
    public string Type
    {
        get
        {
            return type;
        }
        set
        {
            type = value;
            OnPropertyChanged("Type");
        }
    } 

    private ServiceReference1.tblBooking booking;
    public ServiceReference1.tblBooking Booking 
    {
        get 
        {
            return booking;
        }
        set 
        {
            booking = value;
            OnPropertyChanged("Booking");
        }
    }

    private ServiceReference1.tblGuest guest;
    public ServiceReference1.tblGuest Guest
    {
        get
        {
            return guest;
        }
        set
        {
            guest = value;
            OnPropertyChanged("Guest");
        }
    }

    private tblRoom room;
    public tblRoom Room
    {
        get
        {
            return room;
        }
        set
        {
            room = value;
            OnPropertyChanged("Room");
        }
    }

 public ICommand _btnAddBooking;
    public ICommand btnAddBooking
    {
        get
        {
            if (_btnAddBooking == null)
            {
                _btnAddBooking = new DelegateCommand(delegate()
                {
                    try
                    {
                        Service1Client wcf = new Service1Client();
                        wcf.AddBooking(Booking, Guest, Room, Type);
                        IsBookingSaved = true;
                        wcf.Close();


                    }
                    catch
                    {
                        Trace.WriteLine("working...", "MyApp");
                    }
                });
            }

            return _btnAddBooking;
        }
    }

主窗口.xaml

 <ListView SelectionMode="Single" Height="428" HorizontalAlignment="Left" Margin="6,6,0,0" Name="lvReservations" VerticalAlignment="Top" Width="654" BorderBrush="Black" SelectedItem= "{Binding Booking, UpdateSourceTrigger=PropertyChanged}" ItemsSource="{Binding Path=Bookings}" Foreground="Black" >
                    <ListView.View>

 <GridView.Columns>
                                <GridViewColumn DisplayMemberBinding="{Binding Path = tblGuest.Name}" Header="Ime i prezime" Width="240" />
                                <GridViewColumn DisplayMemberBinding="{Binding Path = tblRoom.RoomNo}" Header="Soba" Width="80"/>
                                <GridViewColumn DisplayMemberBinding="{Binding StartDate, StringFormat=\{0:dd.MM.yyyy.\}}" Header="Od" Width="100"/>
                                <GridViewColumn DisplayMemberBinding="{Binding EndDate, StringFormat=\{0:dd.MM.yyyy.\}}" Header="Do" Width="100"/>
                                <GridViewColumn Header="Aktivno">
                                    <GridViewColumn.CellTemplate>
                                        <DataTemplate>
                                            <CheckBox IsChecked="{Binding IsActive}" Name="IsActive" CommandParameter="{Binding}" Command="{Binding DataContext.Activated, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListView}}}" Click="CheckBox_Click" />
                                        </DataTemplate>
                                    </GridViewColumn.CellTemplate>
                                </GridViewColumn>
                                <GridViewColumn Header="Otkazano">
                                    <GridViewColumn.CellTemplate>
                                        <DataTemplate>
                                            <CheckBox IsChecked="{Binding IsCanceled}" Name="IsCanceled" CommandParameter="{Binding}" Command="{Binding DataContext.CanceledReservation, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}}" Click="CheckBox_Click" />
                                        </DataTemplate>
                                    </GridViewColumn.CellTemplate>
                                </GridViewColumn>
                            </GridView.Columns>
                        </GridView>
                    </ListView.View>
                </ListView>

主窗口视图模型

 private ObservableCollection<tblBooking> bookings;
    public ObservableCollection<tblBooking> Bookings
    {
        get
        {
            return bookings;
        }
        set
        {
            bookings = value;
            OnPropertyChanged("Bookings");
        }
    }

 private tblBooking booking;
    public tblBooking Booking
    {
        get
        {
            return booking;
        }
        set
        {
            booking = value;
            OnPropertyChanged("Booking");
        }
    }

public ICommand _btnAddReservation;
    public ICommand btnAddReservation
    {
        get
        {
            if (_btnAddReservation == null)
            {
                _btnAddReservation = new DelegateCommand(delegate()
                {
                    try
                    {
                        BookingsWindow bookings = new BookingsWindow();
                        bookings.ShowDialog();

                        var vm = bookings.DataContext as BookingsViewModel;
                        if (vm != null)
                        {
                            if (vm.IsBookingSaved)
                            {

                                var booking = vm.Booking as tblBooking;                                 

                                Booking = booking;
                                Bookings.Add(booking);

                            }
                        }
                    }
                    catch
                    {
                        Trace.WriteLine("working...", "MyApp");
                    }
                });
            }
            return _btnAddReservation;
        }
    }

有关问题的更多描述，请发表评论，我会更具体。问候。

编辑：

Wcf 服务：

bool IService1.AddBooking(tblBooking booking, tblGuest guest, tblRoom room, string type)
    {
        try
        {
            context = new HotelBaseEntities();
            tblBooking book = new tblBooking();
            tblStayGuest stayGuest = new tblStayGuest();

            tblRoom rm = (from r in context.tblRooms where r.RoomID == room.RoomID select r).FirstOrDefault();

            book.GuestID = guest.GuestID;
            book.RoomID = room.RoomID;
            rm.RoomStatus = true;

            book.StartDate = booking.StartDate;
            book.EndDate = booking.EndDate;
            book.PansionType = type;

            stayGuest.IsMainGuest = true;
            book.IsActive = false;
            book.IsCanceled = false;

            guest.IsCheckedOut = false;
            context.AddTotblBookings(book);
            context.SaveChanges();

            return true;
        }

tblStayGuests 是定义当前在酒店的客人的表。这对我的问题并不重要。正如您在我的绑定中看到的那样，我将 ListView 的项目源绑定到“Bookings”属性，并且从其他列获取数据的列绑定为：例如“Bookings.tblGuest.Name”。在我重新打开窗口之前，像这样绑定的列不会刷新。这就是我要解决的问题。

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0 回答 0