wpf自定义控件本地属性绑定

Question

我有一个名为 RoomAndPersonsAccommodationItem 的自定义控件，里面有属性个房间：

 public static readonly DependencyProperty roomProperty =
DependencyProperty.Register("Room", typeof(RoomData),
typeof(RoomAndPersonsAccommodationItem), new FrameworkPropertyMetadata(null));

        public RoomData RoomProperty
        {
            get { return GetValue(roomProperty) as RoomData; }
            set { SetValue(roomProperty, value); }
        }


        private RoomData room = null;
public RoomData Room
        {
            get { return room; }
            set { room = value; }
        }

RoomAndPersonsAccommodationItem 的设置类似于 ListView 上的 DataTemplate：

<ListView Name="RoomsListView" HorizontalAlignment="Stretch"   VerticalAlignment="Stretch" >
                    <ListView.ItemsPanel>
                        <ItemsPanelTemplate>
                            <StackPanel Orientation="Horizontal"></StackPanel>
                        </ItemsPanelTemplate>
                    </ListView.ItemsPanel>
                    <ListView.ItemTemplate>
                        <DataTemplate>
                            <Controls:RoomAndPersonsAccommodationItem Room="{Binding Path=., Mode=TwoWay}" HorizontalAlignment="Stretch" 
                                                                      VerticalAlignment="Stretch" />
                        </DataTemplate>
                    </ListView.ItemTemplate>

                </ListView>

在 class 上面的 ListView- RoomsListView 在哪里我有这个代码：

RoomsListView.ItemsSource = reservation.Rooms; 
//reservation.Rooms is List<RoomData>

问题在这里：

<Controls:RoomAndPersonsAccommodationItem Room="{Binding Path=., Mode=TwoWay}" HorizontalAlignment="Stretch" 
                                                                          VerticalAlignment="Stretch" />

我想将 Room 属性绑定到 ListView 上 ItemSource 的房间对象，但我收到 null。有谁知道我哪里错了？也许在这里：Room="{Binding Path=., Mode=TwoWay}" 或 Dependency属性声明？

谢谢马丁

更新：

仍然无效...结果始终为空。我尝试了很多类似的选项来绑定 Tag 或 DataContext 但没有任何反应。我想问题不在 Dependency属性中。它在某处绑定我的东西...... 这又是代码：

private ReservationData reservation = null;
//Methods
private void fillForms()
        {
            //Logic
                    RoomsListView.ItemsSource = reservation.Rooms;
            //Logic
        }

这是带有 DataTemplate 的 ListView：

<ListView Name="RoomsListView" HorizontalAlignment="Stretch"   VerticalAlignment="Stretch" >
                    <ListView.ItemsPanel>
                        <ItemsPanelTemplate>
                            <StackPanel Orientation="Horizontal"></StackPanel>
                        </ItemsPanelTemplate>
                    </ListView.ItemsPanel>
                    <ListView.ItemTemplate>
                        <DataTemplate>
                            <Controls:RoomAndPersonsAccommodationItem
                                Room="{Binding}"
                                HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
                        </DataTemplate>
                    </ListView.ItemTemplate>

                </ListView>

RoomAndPersonsAccommodationItem 中的依赖项属性：

public static readonly DependencyProperty RoomProperty =
    DependencyProperty.Register(
        "Room", typeof(RoomData), typeof(RoomAndPersonsAccommodationItem),
        new FrameworkPropertyMetadata(null));

        public RoomData Room
        {
            get { return (RoomData)GetValue(RoomProperty); }
            set { 
                SetValue(RoomProperty, value); }
        }

更新 2

已解决 上面的来源是正确的。错误的结果来自于我在构造函数完成之前检查了房间属性。当我检查构造函数后的结果时，一切正常！谢谢！

Answer 1

试试这个，一个属性和一个依赖项属性属性:

public static readonly DependencyProperty RoomProperty =
    DependencyProperty.Register(
        "Room", typeof(RoomData), typeof(RoomAndPersonsAccommodationItem),
        new FrameworkPropertyMetadata(null)); 

public RoomData Room
{
     get { return (RoomData)GetValue(RoomProperty); }
     set { SetValue(RoomProperty, value); }
}

您也可以从绑定中删除 "Path"，这不是必需的。

wpf自定义控件本地属性绑定

wpf custom control local property binding

c#

wpf

binding

controls

properties