listView를 새 항목으로 업데이트하려면 어떻게해야합니까?

Question

나는이 개 분야

string Name

및

int Age

가 어떻게 사용자가 Button를 누를 때 listView에 바인딩 된 컬렉션에이 정보를 추가 할 있나요?

Answer 1

다음은 간단한 예입니다. this 문서에 설명 된 RelayCommand 및 ObservableObject 클래스를 사용한다고 가정합니다.

<Grid> 
    <Grid.RowDefinitions> 
     <RowDefinition Height="60*" /> 
     <RowDefinition Height="20*" /> 
     <RowDefinition Height="20*" /> 
    </Grid.RowDefinitions> 

    <ListBox ItemsSource="{Binding People}" 
      Margin="5"> 
     <ListBox.ItemTemplate> 
      <DataTemplate> 
       <StackPanel Orientation="Horizontal"> 
        <TextBlock Text="{Binding Name}" /> 
        <TextBlock Text=", " /> 
        <TextBlock Text="{Binding Age}" /> 
       </StackPanel> 
      </DataTemplate> 
     </ListBox.ItemTemplate> 
    </ListBox> 

    <Grid Grid.Row="1"> 
     <Grid.RowDefinitions> 
      <RowDefinition Height="50*" /> 
      <RowDefinition Height="50*" /> 
     </Grid.RowDefinitions> 
     <Grid.ColumnDefinitions> 
      <ColumnDefinition Width="Auto" /> 
      <ColumnDefinition Width="*" /> 
     </Grid.ColumnDefinitions> 

     <Label>Name:</Label> 
     <Label Grid.Row="1">Age:</Label> 

     <TextBox Grid.Column="1" 
       Margin="5" 
       Text="{Binding Name}"/> 
     <TextBox Grid.Column="1" 
       Grid.Row="1" 
       Margin="5" 
       Text="{Binding Age}"/> 

    </Grid> 

    <Button Grid.Row="2" 
      Margin="5" 
      Command="{Binding AddPersonCommand}">Add Person</Button> 

</Grid> 

다음

MainWindow.xaml

는 귀하의 정보를 유지하는 간단한 클래스를 만듭니다.

public class Person 
{ 
    public string Name { get; set; } 
    public int Age { get; set; } 
} 

마지막으로 정보를 조작하기위한 간단한 viewModel을 만듭니다.

public class AppViewModel : ObservableObject 
{ 
    private int _age; 
    private string _name; 

    private RelayCommand _AddPersonCommand; 

    private ObservableCollection<Person> _people = new ObservableCollection<Person>() 
    { 
     new Person { Name="Ben", Age=26 }, 
     new Person { Name="George", Age=40 }, 
     new Person { Name="Amy", Age=38 }, 
     new Person { Name="April", Age=22 }, 
     new Person { Name="Mick", Age=45 }, 
     new Person { Name="Steph", Age=32 }, 
     new Person { Name="Mel", Age=35 }, 
     new Person { Name="Emma", Age=28 }, 
    }; 

    public IEnumerable People 
    { 
     get { return _people; } 
    } 

    public ICommand AddPersonCommand 
    { 
     get 
     { 
      if (_AddPersonCommand == null) 
      { 
       _AddPersonCommand = new RelayCommand(p=> this.AddPerson()); 
      } 
      return _AddPersonCommand; 
     } 
    } 

    public string Name 
    { 
     get { return _name; } 
     set 
     { 
      _name = value; 
      NotifyPropertyChanged("Name"); 
     } 
    } 

    public int Age 
    { 
     get { return _age; } 
     set 
     { 
      _age = value; 
      NotifyPropertyChanged("Age"); 
     } 
    } 

    private void AddPerson() 
    { 
      Person p = new Person(); 
      p.Name = _name; 
      p.Age = _age; 
      _people.Add(p); 
    } 
}