我正在尝试使用 MVVM 设计模式将 WPF 组合框 ItemsSource 与集合绑定。以下是我的代码
XAML:
<ComboBox Height="30" Width="200" ItemsSource="{Binding PeopleList,Mode=TwoWay}"></ComboBox>
<TextBlock Height="Auto" Width="Auto" Text="{Binding SelectedPerson.ContactNo}"></TextBlock>
代码背后:
public MainWindow()
{
InitializeComponent();
ViewModel vm = new ViewModel();
DataContext = vm;
}
模型类:
class People : INotifyPropertyChanged
{
private string name;
public string Name
{
get { return name; }
set
{
name = value;
NotifyPropertyChanged("Name");
}
}
private string contactNo;
public string ContactNo
{
get { return contactNo; }
set
{
contactNo = value;
NotifyPropertyChanged("ContactNo");
}
}
private ObservableCollection<People> peopleList;
public ObservableCollection<People> PeopleList
{
get { return peopleList; }
set
{
peopleList = value;
NotifyPropertyChanged("PeopleList");
}
}
private People selectedPerson;
public People SelectedPerson
{
get { return selectedPerson; }
set
{
selectedPerson = value;
NotifyPropertyChanged("SelectedPerson");
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected void NotifyPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
视图模型类:
class ViewModel
{
ObservableCollection<People> PeopleList = null;
public ViewModel()
{
PeopleList = new ObservableCollection<People>();
People p1 = new People { Name = "Naresh", ContactNo = "9574733355" };
People p2 = new People { Name = "Ritesh", ContactNo = "9099028779" };
People p3 = new People { Name = "Saumya", ContactNo = "9904848779" };
PeopleList.Add(p1);
PeopleList.Add(p2);
PeopleList.Add(p3);
People People = new People();
People.PeopleList = PeopleList;
}
所以,这就是我到目前为止所做的。在这里,我面临的问题是当我单击组合框时没有任何反应。
提前感谢您的帮助。