列表视图双向绑定拥有的ObservableCollection

问题描述

::::::::::的ObservableCollection ::::::::::

:::::::::: ObservableCollection ::::::::::

    ObservableCollection<Friend> Friends = new ObservableCollection<Friend> ( );

:::::::::: InitializeFriends ::::::::::

:::::::::: InitializeFriends ::::::::::

        private void InitializeFriends ( )
        {
            JsonObject _JsonObject = Process . FacebookClient . Get ( "/me/friends" ) as JsonObject;

            if ( _JsonObject != null )
            {
                JsonArray _JsonArray = _JsonObject [ "data" ] as JsonArray;
                foreach ( JsonObject Friend in _JsonArray )
                {
                    Friends . Add ( new Friend ( ) { Name = Friend [ "name" ] . ToString ( ) } );
                }
            }
        }

::::::::::朋友::::::::::

:::::::::: Friend ::::::::::

    public class Friend
    {
        public string Name { get; set; }
        public Conversation Chat { get; set; }
        public BitmapImage Image { get; set; }
    }

::::::::::的ListView ::::::::::

:::::::::: ListView ::::::::::

        <ListView Name="Panel"
              Width="Auto"
              Margin="0,200,0,0"
              HorizontalAlignment="Stretch"
              VerticalAlignment="Stretch"
              Background="{x:Null}"
              BorderThickness="0"
              ItemsSource="{Binding Path=Friends,
                                    Mode=TwoWay}"
              ScrollViewer.HorizontalScrollBarVisibility="Disabled"
              SelectionMode="Single">
        <ListView.ItemsPanel>
            <ItemsPanelTemplate>
                <WrapPanel Orientation="Horizontal" />
            </ItemsPanelTemplate>
        </ListView.ItemsPanel>
        <ListView.View>
            <GridView ColumnHeaderContainerStyle="{StaticResource hiddenStyle}">
                <GridViewColumn Width="200" DisplayMemberBinding="{Binding Path=Name}" />
                <GridViewColumn Width="100">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <StackPanel>
                                <Image Width="30"
                                       Height="30"
                                       Source="{Binding Path=Image}" />
                            </StackPanel>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
            </GridView>
        </ListView.View>
    </ListView>

列表视图不具约束力，可以结合，但不更新？！结果
有什么不对

List View Not Binding May Be Binding But Not Updating ?!!!
There is something WRONG

推荐答案

您朋友类需要实现的接口，这样WPF通知当一个变化已经给该属性的。

Your Friend class needs to implement the INotifyPropertyChanged interface, so that WPF notifies when a change has been made to that property.

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