WPF 中双向绑定通知机制之ObservableCollection

ObservableCollection，继承了Collection, INotifyCollectionChanged, INotifyPropertyChanged，UI更新的数据反映到后台会更新对应的UI

　　例：UC1ViewModel类

 1 Imports System.Collections.ObjectModel
 2 
 3 Public Class UC1ViewModel
 4     Inherits ViewModelBase
 5 
 6     Private _datas As ObservableCollection(Of PersonInfo)
 7     Public ReadOnly Property Datas As ObservableCollection(Of PersonInfo)
 8         Get
 9             Return _datas
10         End Get
11     End Property
12 
13     Private _selectedData As PersonInfo
14     Public Property SelectedData As PersonInfo
15         Get
16             Return _selectedData
17         End Get
18         Set(value As PersonInfo)
19             _selectedData = value
20             OnPropertyChanged("SelectedData")
21         End Set
22     End Property
23 
24     Public Sub New()
25         _datas = New ObservableCollection(Of PersonInfo)
26     End Sub
27 
28     Public Sub BuildViewModel()
29         '_datas.Add("zhangsan 男　23歳")
30         '_datas.Add("zhangsan1")
31         '_datas.Add("zhangsan")
32         '_datas.Add("zhangsan3")
33         '_datas.Add("zhangsan")
34         '_datas.Add("zhangsan")
35         '_datas.Add("zhangsan")
36         _datas.Add(New PersonInfo() With {.Name = "zhangsan", .Age = 23})
37         _datas.Add(New PersonInfo() With {.Name = "zhangsan2", .Age = 5})
38         _datas.Add(New PersonInfo() With {.Name = "zhangsan3", .Age = 67})
39         _datas.Add(New PersonInfo() With {.Name = "zhangsan4", .Age = 23})
40 
41         Me.SelectedData = _datas.Last
42     End Sub
43 
44 End Class

PersonInfo类

 1 Public Class PersonInfo
 2 
 3     Private _name As String
 4     Public Property Name As String
 5         Get
 6             Return _name
 7         End Get
 8         Set(value As String)
 9             _name = value
10         End Set
11     End Property
12 
13     Private _age As Integer
14     Public Property Age As Integer
15         Get
16             Return _age
17         End Get
18         Set(value As Integer)
19             _age = value
20         End Set
21     End Property
22 
23     Public Overrides Function ToString() As String  'Overrides重写
24         Return String.Format("{0}:{1}", Name, Age.ToString())
25     End Function
26 
27 End Class

上述例子是工程里的部分代码，其他详细工程案例见：

WPF 中双向绑定通知机制之ObservableCollection使用

ObservableCollection和List的区别总结（推荐）

补充:List<T>和ObservableCollection<T>的相互转换

ObservableCollection转换List

ObservableCollection<T> o; // 假设已经赋值

List<T> list = new List<T>(o.ToList());

ObservableCollection<T> o; // 假设已经赋值

List<T> list = new List<T>(o.ToList());

List转换ObservableCollection

List<T> list; // 假设已经赋值

// 方法1
ObservableCollection<T> o = new ObservableCollection<T>(list);

//方法2
ObservableCollection<T> o = new ObservableCollection<T>();
list.Foreach(l => o.Add(l));

365个夜晚，我希望做到两天更一篇博客。加油，小白！