Binding to List Data 绑定到列表数据

标签：绑定 people List People Binding ICollectionView 数据源 Data view

得到当前项

1  void birthdayButton_Click(object sender, RoutedEventArgs e) {
2  // Get the current person out of the collection view
3  People people = (People)this.FindResource("Family");
4  ICollectionView view =
5  CollectionViewSource.GetDefaultView(people);
6  Person person = (Person)view.CurrentItem;
7  ++person.Age;
8  MessageBox.Show(...);
9  }

Navigating between items  改变当前项

//得到数据的视图
 ICollectionView GetFamilyView( ) {
 People people = (People)this.FindResource("Family");
 return CollectionViewSource.GetDefaultView(people);
 }

1 //上一条记录
2  void backButton_Click(object sender, RoutedEventArgs e) {
3  ICollectionView view = GetFamilyView();
4  view.MoveCurrentToPrevious();
5  if( view.IsCurrentBeforeFirst ) {
6  view.MoveCurrentToFirst();
7  }
8  }

//下一条记录
 void forwardButton_Click(object sender, RoutedEventArgs e) {
 ICollectionView view = GetFamilyView();
 view.MoveCurrentToNext();
 if( view.IsCurrentAfterLast ) {
 view.MoveCurrentToLast();
 }
 }

List Data Targets

<ListBox x:Name="lb" ItemsSource="{Binding}" DisplayMemberPath="Name" SelectedValuePath="Age"    IsSynchronizedWithCurrentItem="True"/>

  ListBox的ItemsSource属性是一个没有路径的Binding ，相当于“绑定到整个当前对象”，即从父控件继承上下文数据 DataContent 将ListBox类的IsSynchronizedWithCurrentItem属性设置为True ，这样当列表框的选定项发生变化时，它会更新视图中的当前项（反之亦然）

<ComboBox ItemsSource="{StaticResource NamedAgeLookup}" DisplayMemberPath="NameForAge" SelectedValuePath="AgeId" SelectedValue="{Binding Path=Age}" />

注意：绑定的“Age"属性在当前数据源中是没有的，他会找上级数据源，当上级数据源的当前项变更时，ConboBox会显示 上级的当前项Age值=AgeId值对应的项。

 

 

标签：绑定,people,List,People,Binding,ICollectionView,数据源,Data,view
From： https://www.cnblogs.com/friend/p/17043143.html