Question

我有一个组合框，复选框内有复选框。我想要多选复选框的值。我的代码：

<ComboBox Name="LocationFilterComboBox" Width="100" SelectedItem="{Binding LocationValue}">
   <ComboBox.ItemTemplate >
      <DataTemplate>
         <StackPanel Orientation="Horizontal" >
            <CheckBox Content="{Binding LocationValue}"  IsChecked="{Binding ElementName=all, Path=IsChecked, Mode=TwoWay}" Width="120" />
         </StackPanel>
      </DataTemplate>
   </ComboBox.ItemTemplate>
</ComboBox>

后端代码：

//code to get the value
public partial class Location
{
    #region Property
    private string LOCAID;
    public string LocaId
    {
        get
        {
            return LOCAID;
        }
        set
        {
            value = LOCAID;
        }
    }

    private string LOCADESC;
    public string LocationValue
    {
        get
        {
            return LOCADESC;
        }
        set
        {
            value = LOCADESC;
        }
    }
    #endregion
}
}

//code for binding the location
public IList<Location> BindAllLocation()
{
    if (Repository != null) Repository.Dispose();
    Repository = GetInvoiceRepository();
    IList<Location> locationList = Repository.GetLocations(((App)Application.Current).DataContextFactory);

    return locationList;
}

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    LocationFilterComboBox.ItemsSource = BindAllLocation();
}

Answer 1

我不会直接设置ItemsSource。尝试绑定它：

private ObservableCollection<Location> _locationList = new ObservableCollection<Location>();
public ObservableCollection<Location> LocationList
{
    get { return _locationList; };
    set
    {
        if (_locationList == value)
            return;
        _locationList = value;
        OnPropertyChanged();
}

private Location _currentLocation;
public Location CurrentLocation
{
    get { return _currentLocation; };
    set
    {
        if (_currentLocation == value)
            return;
        _currentLocation = value;
        OnPropertyChanged();
}

public IList BindAllLocation()
{
    if (Repository != null) Repository.Dispose();
        Repository = GetInvoiceRepository();
    IList<Location> locationList = Repository.GetLocations(((App)Application.Current).DataContextFactory);
    return locationList;
}

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    foreach (var item in BindAllLocation())
        LocationList.Add(item);
}

在Xaml中：

<ComboBox ItemsSource="{Binding *binding to LocationList*}" Width="100" SelectedItem="{Binding CurrentLocation}">
    <ComboBox.ItemTemplate >
        <DataTemplate>
            <StackPanel Orientation="Horizontal" >
                <CheckBox Content="{Binding LocationValue}"  IsChecked="{Binding IsChecked, Mode=TwoWay}" Width="120" />
            </StackPanel>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

我不知道ComboBox上的DataContext，所以如果您遇到问题请尝试this。

然后您可以使用以下方法对所选值进行排序：

var result = LocationList.Where(x => x.IsChecked);

当然，你必须有一个IsChecked属性。

Answer 2

由于IsChecked中每个CheckBox的{{1}}属性都绑定到“全部”ComboBox的{{1}}属性，因此您应该能够直接从这个获得价值：

IsChecked

否则另一个选项是将CheckBox属性添加到bool isChecked = all.IsChecked;类并绑定到此类：

bool

然后，您可以通过简单地迭代Location来获取<CheckBox Content="{Binding LocationValue}" IsChecked="{Binding IsChecked}" Width="120" />中每个人CheckBox的价值：

ComboBox

如何获取组合框WPF中复选框的值？

2 个答案: