你只需要一个模型:
public class Person : INotifyPropertyChanged
{
string _name;
public string Name { get { return _name; } set { _name = value; RaisePropertyChanged("Name"); } }
bool _isSentenced;
public bool IsSentenced { get { return _isSentenced; } set { _isSentenced = value; RaisePropertyChanged("IsSentenced"); } }
string _sentence;
public string Sentence { get { return _sentence; } set { _sentence = value; RaisePropertyChanged("Sentence"); } }
public event PropertyChangedEventHandler PropertyChanged;
void RaisePropertyChanged(string propname)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propname));
}
}
使用IsSentenced
和单选按钮绑定到它。此外,使用Visibility to Bool转换器,检查显示Sentence
字符串的文本框的可见性到RadioButton
的IsChecked属性。下面是一个简单的例子:
<Window.Resources>
<local:VisibilityToBoolConverter x:Key="VisibilityToBoolConverter"/>
</Window.Resources>
<ListBox DataContext="{Binding}" ItemsSource="{Binding Persons}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBox Text="{Binding Name}" />
<RadioButton Content="Is sentenced to death" IsChecked="{Binding IsSentenced}" />
<DockPanel Visibility="{Binding IsSentenced , Converter={StaticResource VisibilityToBoolConverter}}">
<Label Content="Sentence: "/>
<TextBlock Text="{Binding Sentence}" />
</DockPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
其中
public class VisibilityToBoolConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if ((bool)value == true)
return Visibility.Visible;
return Visibility.Collapsed;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
if ((Visibility)value == Visibility.Visible)
return true;
return false;
}
}
和视图模型是:
public class PersonViewModel : INotifyPropertyChanged
{
public PersonViewModel()
{
Person m1 = new Person() { Name = "person 1", IsSentenced = false, Sentence = "S S S" };
Person m2 = new Person() { Name = "person 2", IsSentenced = false, Sentence = "B B B" };
Person m3 = new Person() { Name = "person 3", IsSentenced = true, Sentence = "F F F" };
_persons = new ObservableCollection<Person>() { m1, m2, m3 };
}
ObservableCollection<Person> _persons;
public ObservableCollection<Person> Persons { get { return _persons; } set { _persons = value; RaisePropertyChanged("Persons"); } }
public event PropertyChangedEventHandler PropertyChanged;
void RaisePropertyChanged(string propname)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propname));
}
}
主窗口应设置的DataContext:
public MainWindow()
{
PersonViewModel mv = new PersonViewModel();
this.DataContext = mv;
InitializeComponent();
}
编辑
如果一个人有很多状态,ComboBox是更自然的选择。你应该有一个描述状态的枚举:
public enum MyTypes
{
None,
IsA,
IsB,
IsC
}
和人都应该有一个peroperty显示状态:
public class Person : INotifyPropertyChanged
{
MyTypes _thetype;
public MyTypes TheType { get { return _thetype; } set { _thetype = value; RaisePropertyChanged("TheType"); } }
string _name;
public string Name { get { return _name; } set { _name = value; RaisePropertyChanged("Name"); } }
public event PropertyChangedEventHandler PropertyChanged;
void RaisePropertyChanged(string propname)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propname));
}
}
,因为你需要你的组合框的的ItemsSource绑定到列表状态,一种可能性是调整视图模型有这样一个清单:
public class PersonViewModel : INotifyPropertyChanged
{
public PersonViewModel()
{
Person m0 = new Person() { Name = "person 1", TheType = MyTypes.None };
Person m1 = new Person() { Name = "person 1", TheType = MyTypes.IsA };
Person m2 = new Person() { Name = "person 2", TheType = MyTypes.IsB };
Person m3 = new Person() { Name = "person 3", TheType = MyTypes.IsC };
_persons = new ObservableCollection<Person>() { m0, m1, m2, m3 };
_types = Enum.GetNames(typeof(MyTypes)).ToList();
}
List<string> _types;
public List<string> Types { get { return _types; } }
ObservableCollection<Person> _persons;
public ObservableCollection<Person> Persons { get { return _persons; } set { _persons = value; RaisePropertyChanged("Persons"); } }
public event PropertyChangedEventHandler PropertyChanged;
void RaisePropertyChanged(string propname)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propname));
}
}
,并在最后查看:
<Window.Resources>
<local:EnumToSentenceConverterx:Key="EnumToSentenceConverter"/>
<local:NoneToCollapsedConverter x:Key="NoneToCollapsedConverter"/>
<local:EnumToStringConverter x:Key="EnumToStringConverter"/>
</Window.Resources>
<ListBox Name="lb" DataContext="{Binding}" ItemsSource="{Binding Persons}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBox Text="{Binding Name}" />
<ComboBox Name="cb" ItemsSource="{Binding ElementName=lb, Path=DataContext.Types}" SelectedValue="{Binding TheType, Mode=TwoWay, Converter={StaticResource EnumToStringConverter}}" />
<DockPanel Visibility="{Binding ElementName=cb, Path=SelectedValue, Converter={StaticResource NoneToCollapsedConverter}}">
<Label Content="Sentence: " DockPanel.Dock="Left"/>
<TextBlock Text="{Binding TheType, Converter={StaticResource EnumToStringConverter}}" DockPanel.Dock="Right" VerticalAlignment="Center" />
</DockPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
请注意,您需要三个转换器。一个集句部分的知名度,晕倒,其类型为无:
public class NoneToCollapsedConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value.ToString() == "None")
return Visibility.Collapsed;
return Visibility.Visible;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
两个人是自我描述:
public class EnumToStringConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return value.ToString();
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return Enum.Parse(typeof(MyTypes), value.ToString());
}
}
和
public class EnumToSentenceConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
switch ((MyTypes)value)
{
case MyTypes.IsA:
break;
}
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
希望它能帮助。
我不认为我得到这个。如果枚举被设置为被判刑人员,我仍然需要定义某个地方。必须显示句子TextBox。除此之外,我还看到填充DataContext视图模型的问题。在MyLovelyEnum的枚举设置器中,我丢失了控件中的数据,我的意思是来自基础对象的公共数据。它描述了名称属性的值。 – y434y