您可以使用 MVVM 模式将 XAML 绑定到包含 ListView 信息的类,并根据所选 Comany 项目重置 Division 集合的内容。
这是一个基本示例,可帮助您入门。
这是 XAML 中的两个 ListView 控件:
<Window x:Class="MultiListView.Views.MainView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Main Window" Height="400" Width="800">
<DockPanel>
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<ListView Grid.Row="0"
ItemsSource="{Binding Companies}"
SelectedItem="{Binding Company, Mode=TwoWay}">
<ListView.View>
<GridView>
<GridViewColumn Header="Name"
DisplayMemberBinding="{Binding CompanyName}" />
<GridViewColumn Header="Description"
DisplayMemberBinding="{Binding Description}" />
</GridView>
</ListView.View>
</ListView>
<ListView Grid.Row="1"
ItemsSource="{Binding Divisions}"
SelectedItem="{Binding Division, Mode=TwoWay}">
<ListView.View>
<GridView>
<GridViewColumn Header="Name"
DisplayMemberBinding="{Binding DivisionName}" />
<GridViewColumn Header="Description"
DisplayMemberBinding="{Binding Description}" />
</GridView>
</ListView.View>
</ListView>
</Grid>
</DockPanel>
</Window>
在代码隐藏中,将 Window 的 DataContext 设置为包含 XAML 中使用的绑定引用的类。
public partial class MainView : Window
{
MainViewModel _mvm = new MainViewModel();
public MainView()
{
InitializeComponent();
DataContext = _mvm;
}
}
下面的类使用了MVVM模式,你可以找到很多资料
在 StackOverFlow 中打开。此类包含 XAML 绑定的数据。这里
是您可以使用 LINQ 加载/重新加载集合的地方。
using System.Collections.ObjectModel;
using MultiListView.Models;
namespace MultiListView.ViewModels
{
public class MainViewModel : ViewModelBase
{
public MainViewModel()
{
_companies = new ObservableCollection<Company>();
_companies.Add(new Company("Stackoverflow", "QA web site"));
_companies.Add(new Company("Fog Creek", "Agile Bug Tracking"));
_companies.Add(new Company("Second Beach", "Not sure yet"));
_divisions = new ObservableCollection<Division>();
}
private ObservableCollection<Company> _companies;
public ObservableCollection<Company> Companies
{
get { return _companies; }
set
{
_companies = value;
OnPropertyChanged("Companies");
}
}
private Company _company;
public Company Company
{
get { return _company; }
set
{
_company = value;
// load/reload divisions for the selected company here
LoadDivisions();
OnPropertyChanged("Company");
}
}
// hack to keep the example simpe...
private void LoadDivisions()
{
_divisions.Clear();
// use db or linq here to filiter property
if ( _company != null )
{
if ( _company.CompanyName.Equals("Stackoverflow") )
{
_divisions.Add( new Division("QA", "Test all day"));
_divisions.Add( new Division("Write", "Doc all day"));
_divisions.Add( new Division("Code", "Code all day"));
}
else if (_company.CompanyName.Equals("Fog Creek"))
{
_divisions.Add(new Division("Test", "Test all day"));
_divisions.Add(new Division("Doc", "Doc all day"));
_divisions.Add(new Division("Develop", "Code all day"));
}
else if (_company.CompanyName.Equals("Second Beach"))
{
_divisions.Add(new Division("Engineering", "Code all day"));
}
}
}
private ObservableCollection<Division> _divisions;
public ObservableCollection<Division> Divisions
{
get { return _divisions; }
set
{
_divisions = value;
OnPropertyChanged("Divisions");
}
}
private Division _division;
public Division Division
{
get { return _division; }
set
{
_division = value;
OnPropertyChanged("Division");
}
}
}
}
OnPropertyChanged 实现 INotifyPropertyChanged。
当 ViewModel 的属性发生变化时,绑定到 ViewModel 的 View 会在 ViewModel 引发其 PropertyChanged 事件时收到通知。
您可以在大多数 MVVM 库中找到示例,或查看 MSDN 以获取示例。