dev312基于wpf的數(shù)據(jù)綁定

1、DEV312基于WPF的數(shù)據(jù)綁定,,最大多數(shù)的應(yīng)用程序都是基于數(shù)據(jù)的程序,三個要點(diǎn),對數(shù)據(jù)的強(qiáng)大支持對數(shù)據(jù)的普遍支持對數(shù)據(jù)的靈活支持,,對數(shù)據(jù)的強(qiáng)大支持,對數(shù)據(jù)的強(qiáng)大支持,單一綁定 (Singular Binding)數(shù)據(jù)模板 (DataTemplate)表綁定 (List Binding)集合視圖 (CollectionView),對數(shù)據(jù)的強(qiáng)大支持,單一綁定 (Singular Binding)數(shù)據(jù)模板 (DataTem

2、plate)表綁定 (List Binding)集合視圖 (CollectionView),單一綁定,數(shù)據(jù)對象,屬性,UI對象,屬性,,,綁定(Binding),,,單一綁定,對數(shù)據(jù)的強(qiáng)大支持,單一綁定 (Singular Binding)數(shù)據(jù)模板 (DataTemplate)表綁定 (List Binding)集合視圖 (CollectionView),數(shù)據(jù)模板定義數(shù)據(jù)的可視化,數(shù)據(jù)模板,public class Auc

3、tionItem{ string Image{get;set;} int RemaingSeconds{get;set;}},數(shù)據(jù)模板 (DataTemplate),Grid,,,Image,TextBlock,,Binding Path= Image,Binding Path=RemainingTime,定義任意的元素樹,Data Template,Data Object,DataType,,,,數(shù)據(jù)模板,數(shù)據(jù)模

4、板 (DataTemplate),通過XAML定義易于修改和提供工具支持Visual Designer for WPFMicrosoft Expression Interactive Designer使用標(biāo)準(zhǔn)的WPF元素Panels, controls, 等.Binding是聯(lián)系數(shù)據(jù)綁定的源(Source)和對象(Target)的橋梁。和控件的模板使用相同的模式,,,Visual Designer for WPF (Cid

5、er),,,Microsoft Expression Interactive Designer (Sparkle),對數(shù)據(jù)的強(qiáng)大支持,單一綁定 (Singular Binding)數(shù)據(jù)模板 (DataTemplate)表綁定 (List Binding)集合視圖 (CollectionView),表綁定 (List Binding),,AuctionItem,AuctionItem,AuctionItem,AuctionItem,

6、…,IEnumerable,,…,ListBox,UI Object 1,UI Object 2,UI Object 3,UI Object 4,,,ListBinding,,,表綁定,對數(shù)據(jù)的強(qiáng)大支持,單一綁定 (Singular Binding)數(shù)據(jù)模板 (DataTemplate)表綁定 (List Binding)集合視圖 (CollectionView),集合視圖 (Collection View),當(dāng)前項 (Curr

7、ent Item)分組 (Group)排序 (Sort)過濾 (Filter),,,集合視圖,,對數(shù)據(jù)的普遍支持,對數(shù)據(jù)的普遍支持,DependencyObject (DO)DependencyProperty (DP),DependencyObject,WPF中所有控件的基類還是很多有用的類的基類Transforms (rotate, skew, scale)Triggers (Event, Data)Brushes

8、等等提供一組核心的服務(wù),CLR的屬性(Property),public decimal Value{get { return _value; }set { _value = value; }}private decimal _value;,Dependency Property,public decimal Value{get { return (decimal)GetValue(ValueProperty);

9、}set { SetValue(ValueProperty, value); }}public static readonly DependencyProperty ValueProperty =DependencyProperty.Register("Value",typeof(decimal),typeof(NumericUpDown), new Propert

10、yMetadata((decimal)0));,DO/DP提供的服務(wù),基本服務(wù) (Base Services)存儲空間 (Storage)缺省值 (Default Value)附加屬性 (Attached Properties)Canvas.Left, Grid.Column, DockPanel.Dock驗證 (Validation)值改變通知 (Change Notifications)強(qiáng)制轉(zhuǎn)化 (Coercion

11、)數(shù)據(jù)綁定 (Binding)框架增加 (Framework Adds)動畫(Animation), 繼承(Inheritance), 樣式(Styling ),,,處處“數(shù)據(jù)綁定”,,對數(shù)據(jù)的靈活支持,WPF支持的數(shù)據(jù)模型,IBindingList (DataTable, BindingList)ICustomTypeDescriptor (DataRowView)INotifyPropertyChanged[Proper

12、ty]Changed event任意的to/from轉(zhuǎn)換One-to-Many Binding異質(zhì)的(Heterogeneous) 數(shù)據(jù)類型有層次的(Hierarchical)數(shù)據(jù)類型,,,有層次的(Hierarchical)數(shù)據(jù)綁定,XML綁定,WPF提供對XML綁定的本地支持XMLDataProvider允許對本地和遠(yuǎn)程數(shù)據(jù)的連接Path模式是XPath,,,XML綁定,回顧三個要點(diǎn),對數(shù)據(jù)的強(qiáng)大支持對數(shù)據(jù)的普遍支持