c# - 如何绑定来自同一个 ICollectionView 的不同 UserControl 中的对象的子属性？

问题描述

我正在使用 MVVM 并希望将 Car.Name 绑定到 aListBox并绑定CarDetailsList到ListViewusing GridView。任何帮助是极大的赞赏。

有一个Model：

public class Car : ObservableObject  // ObservableObject simply means that this object is subject to PropertyChanged notifications.
    {
        private string _name;
        public string Name
        {
            get { return _name; }
            set { OnPropertyChanged(ref _name, value); }
        }     

        private List<CarDetail> _carDetailsList;
        public List<CarDetail> CarDetailsList
        {
            get { return _carDetailsList; }
            set { OnPropertyChanged(ref _carDetailsList, value); }
        }

        // CarDetail makes up a list of properties for the object Car for each "Name"
        public class CarDetail: ObservableObject
        {
            private string _engineType;
            public string EngineType
            {
                get { return _engineType; }
                set { OnPropertyChanged(ref _engineType, value); }
            }

            private string _color;
            public string Color
            {
                get { return _color; }
                set { OnPropertyChanged(ref _color, value); }
            }           
        }
    }

ViewModel包含以下内容：

一个ObservableCollection叫Cars：

public ObservableCollection<Car> Cars { get; set; }

ICommands：

public ICommand SaveCarNameCommand { get; private set; }
public ICommand SaveCarDetailCommand { get; private set; }

一个ICollectionView：

 private ICollectionView _carView;
        public ICollectionView CarView
        {
            get { return _carView; }
            set { OnPropertyChanged(ref _carView, value); }
        }

两个属性：

private Car _selectedCar;
    public Car SelectedCar
    {
        get { return _selectedCar; }
        set
        {
            OnPropertyChanged(ref _selectedCar, value);
        }
    }
       private Car _selectedCarDetail;
    public Car SelectedCarDetial
    {
        get { return _selectedCarDetail; }
        set
        {
            OnPropertyChanged(ref _selectedCarDetail, value);
        }
    }

承包商：

public CarsForSaleViewModel()
{
    Cars = new ObservableCollection<Car>();
    CarView = (CollectionView)new CollectionViewSource { Source = Cars }.View;
    OnPropertyChanged("CarView");
    SaveCarCommand = new RelayCommand(SaveCar);
    SaveCarDetailCommand = new RelayCommand(SaveCarDetail);
    SelectedCar = Cars[0]; //Selects the first Car        
}

ICommand行动：

private void SaveCarDetail()
        {
            var newCarDetail = new Car.CarDetail
            {
                EngineType = SelectedCarDetial.EngineType,
                Color = SelectedCarDetial.Color               
            };
            // Add newCarDetail to CarDetailsList of "SelectedCar" in "DetailsList"
            SelectedCar.CarDetailsList.Add(newCarDetail); 
            CarView.Refresh();
            SelectedCarDetial = newCarDetail; // Selects the newly added item in the list
        }
        
        private void CarSave()
        {
            var newCar = new Car
            {
                Name = SelectedCar.Name,
                CarDetailsList = new List<Car.CarDetail>()
            };
          
            Cars.Add(newCar); // Add newCar to "CarList"
            CarView.Refresh();
            SelectedCar = newCar; // Selects the newly added item in the list
        }

我有一个View名为“CarsForSaleView”的三 (3) 个UserControls。

第一个UserControl“CarView”显示所有Cars按名称。

<ListBox IsSynchronizedWithCurrentItem="True" 
ItemsSource="{Binding CarView}" 
SelectedItem="{Binding SelectedCar, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />

第二个Usercontrol“DetailsView”显示SelectedCar“CarsList”中的详细信息。

<ListView IsSynchronizedWithCurrentItem="True"
          ItemsSource="{Binding SelcetedCar.CarDetailsList}" 
          SelectedItem="{Binding SelectedCarDetial}">
    <ListView.View>
        <GridView AllowsColumnReorder="False">
            <GridViewColumn Header="Engine Type">
                <GridViewColumn.CellTemplate>
                    <DataTemplate>
                        <TextBox Text="{Binding EngineType}"/>
                    </DataTemplate>
                </GridViewColumn.CellTemplate>
            </GridViewColumn>
            <GridViewColumn Header="Color">
                <GridViewColumn.CellTemplate>
                    <DataTemplate>
                        <TextBox Text="{Binding Color}"/>
                    </DataTemplate>
                </GridViewColumn.CellTemplate>
            </GridViewColumn>
        </GridView>
    </ListView.View>
</ListView>

第三个UserControl“SaveCarView”允许用户在绑定到属性Name的 a 中输入 a。当我单击保存时，“CarsList”会更新为带有用户输入名称的新项目。效果很好！TextBoxName

第四UserControl个“SaveCarDetailView”允许用户通过组合框选择EngineType和Color，SelectedCar每个组合框都绑定到各自的CarDetail属性。当我单击保存时，该项目被添加到“DetailsList”中，但是直到用户在“CarsList”中选择不同的“Car”然后选择刚刚将详细信息添加到“DetailsList”中的“Car”时才可见”。

将“DetailsView”绑定ItemsSource到“CarView”ICollecitonView 中的“SelectedCar”以便在添加详细信息时刷新的正确方法是什么？

标签： c#wpf

c# - 如何绑定来自同一个 ICollectionView 的不同 UserControl 中的对象的子属性？

问题描述

解决方案

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