WPF 集合通知更改

集合通知更改，ObservableCollection。属性通知更改，适合单个属性，如果是多个属性的集合数据，使用ObservableCollection。

 

 public partial class ButtonWindow : Window
    {
        ObservableCollection<Students> infos;
        public ButtonWindow()
        {
            InitializeComponent();
            //this.DataContext = new ButtonViewModel();
            //cbEditingModel.ItemsSource = Enum.GetValues(typeof(InkCanvasEditingMode));
            infos = new ObservableCollection<Students>() {
            new Students(){ Id=1, Age=11, Name="Tom",B=false},
            new Students(){ Id=2, Age=12, Name="Darren",B=false},
            new Students(){ Id=3, Age=13, Name="Jacky",B=false},
            new Students(){ Id=4, Age=14, Name="Andy",B=false}
            };
            this.lbStudent.ItemsSource = infos;
            this.txtStudentId.SetBinding(TextBox.TextProperty, new Binding("SelectedItem.Name")
            {
                Source = lbStudent
            }) ;
        }

         private void button1_Click(object sender, RoutedEventArgs e)
         {
            infos[1] = new Students() { Id = 4, Age = 14, Name = "这是一个集合改变",B=true };
            infos[2].Name = "这是一个属性改变";
            infos[3] = new Students() { Id = 666, Age = 66, Name = "666", B = true };
         }

    }
    public class Students
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public int Age { get; set; }
        public bool B { get; set; }
    }

    <Grid>
        <StackPanel Height="295" HorizontalAlignment="Left" Margin="10,10,0,0" Name="stackPanel1" VerticalAlignment="Top" Width="427">
            <TextBlock Height="23" Name="textBlock1" Text="学员编号:" />
            <TextBox Height="23" Name="txtStudentId"  Width="301" HorizontalAlignment="Left"/>
            <TextBlock Height="23" Name="textBlock2" Text="学员列表:" />
            <ListBox Height="156" Name="lbStudent" Width="305" HorizontalAlignment="Left">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Name="stackPanel2" Orientation="Horizontal">
                            <TextBlock  Text="{Binding Id,Mode=TwoWay}" Margin="5" Background="Red"/>
                            <TextBlock Text="{Binding Name,Mode=TwoWay}" Margin="5"/>
                            <TextBlock  Text="{Binding Age,Mode=TwoWay}" Margin="5"/>
                            <TextBlock  Text="{Binding B,Mode=TwoWay}" Margin="5"/>
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
            <Button Content="Button" Height="23" Name="button1" Width="75" HorizontalAlignment="Left" Click="button1_Click" />
        </StackPanel>
    </Grid>

 

第三行得Name值需要Students类实现INotifyPropertyChanged通知，界面就会变化了。 

public class Students : MyBindingBase
    {
        private string _name;
        public int Id { get; set; }
        public string Name
        {
            get { return _name; }
            set { _name = value;OnPropertyChanged(); }
        }
        public int Age { get; set; }
        public bool B { get; set; }
    }

public class MyBindingBase : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        //protected virtual void OnPropertyChanged(string propertyName)
        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = "")//此处使用特性
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }

结果如下:

 

来源：https://blog.csdn.net/u012563853/article/details/123429808