没有详细的DataGrid更新数据

Question

表单上有2个DataGrid链接到CollectionViewSource。更新时，ObservableCollection零件仅更新dataGridMaster。如果我单击它，那么数据将出现在dataGridDetail1中。题。如何在不点击鼠标的情况下更新数据？

XAML：

    <Window.Resources>
        <CollectionViewSource x:Key="vsmaster"  Source="{Binding Parts}"/>
        <CollectionViewSource x:Key="vsdetail1" Source="{Binding PARTIES_V1, Source={StaticResource vsmaster}}" />
    </Window.Resources>

    <DataGrid x:Name="dataGridMaster" AutoGenerateColumns="False" EnableRowVirtualization="True" 
      ItemsSource="{Binding Source={StaticResource vsmaster}}"  Margin="0,10,346,384" 
      RowDetailsVisibilityMode="VisibleWhenSelected">
    <DataGrid x:Name="dataGridDetail1" IsReadOnly="True" SelectionMode="Single" AutoGenerateColumns="False" 
      EnableRowVirtualization="True" 
              ItemsSource="{Binding Source={StaticResource vsdetail1}}" IsSynchronizedWithCurrentItem="True" 
              Margin="0,149,346,215" RowDetailsVisibilityMode="VisibleWhenSelected">
      
public class Part
    public Part(int id, string pnumber, string owner, int? priceid,
        List<PARTIES_V1> lparties) 
    {
        ID = id;
        PART_NUMBER = pnumber;
        OWNER = owner;
        PRICE_ID = priceid;
        PARTIES_V1 = lparties;
    }
    public int ID { get; set; }

    public string PART_NUMBER { get; set; }

    public string OWNER { get; set; }

    public int? PRICE_ID { get; set; }

    public List<PARTIES_V1> PARTIES_V1 { get; set; }

我的ViewModel

class MainWindowViewModel : BaseViewModel
    {
        public string Npart {get; set;} 
        private ObservableCollection<PartsView> _parts;
        public ObservableCollection<PartsView> Parts
        {
            get
            {
                return _parts;
            }
            set 
            {
                _parts = value;
                OnPropertyChanged("Parts");
            }
        }
        public MainWindowViewModel()
        {
            _parts = PartsRepository.GetStartData();
        }

        RelayCommand _findPartCommand;
        public ICommand FindPart
        {
            get
            {
                if ( _findPartCommand == null)
                     _findPartCommand = new RelayCommand(ExecuteFindPartCommand, CanExecuteFindPartCommand);
                return _findPartCommand;
            }
        }

        public void ExecuteFindPartCommand(object parameter)
        {
            _parts = PartsRepository.GetPart(Npart);
        }

        public bool CanExecuteFindPartCommand(object parameter)
        {
            return true;
        }

Answer 1

因为您没有发布完整的代码。所以，我自己创建了一个来看问题。

完成更改后，您必须使用Refresh（）刷新集合视图。

    ((ListCollectionView)dataGridMaster.ItemsSource).Refresh();

**没有VM支持的旧答案**

我的示例应用代码：

<Window x:Class="WpfResources._32691328.Win32691328"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Win32691328" Height="661.015" Width="506.391">
    <Window.Resources>
        <CollectionViewSource x:Key="vsmaster"  Source="{Binding Parts}"/>
        <CollectionViewSource x:Key="vsdetail1" Source="{Binding PARTIES_V1, Source={StaticResource vsmaster}}" />
    </Window.Resources>
    <StackPanel>
        <DataGrid x:Name="dataGridMaster" AutoGenerateColumns="True" EnableRowVirtualization="True" 
      ItemsSource="{Binding Source={StaticResource vsmaster}}"   
      RowDetailsVisibilityMode="VisibleWhenSelected"></DataGrid>
        <Button Content="UpdatePart" Click="Button_Click"/>
        <DataGrid x:Name="dataGridDetail1" Margin="0 10 0 0" IsReadOnly="True" SelectionMode="Single" AutoGenerateColumns="True" 
            EnableRowVirtualization="True" 
            ItemsSource="{Binding Source={StaticResource vsdetail1}}" IsSynchronizedWithCurrentItem="True" 
            RowDetailsVisibilityMode="VisibleWhenSelected"/>
    </StackPanel>
</Window>

using System;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace WpfResources._32691328
{
    /// <summary>
    /// Interaction logic for Win32691328.xaml
    /// </summary>
    public partial class Win32691328 : Window
    {
        public Win32691328()
        {
            InitializeComponent();

            this.DataContext = new DataStore();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            List<PARTIES_V1> p = new List<PARTIES_V1>();
            p.Add(new PARTIES_V1() { ID = -1999 });
            p.Add(new PARTIES_V1() { ID = -1785 });
            p.Add(new PARTIES_V1() { ID = -1123 });

            ObservableCollection<Part> parts = (ObservableCollection<Part>)((ListCollectionView)dataGridMaster.ItemsSource).SourceCollection;
            parts[0].PARTIES_V1 = p;

            ((ListCollectionView)dataGridMaster.ItemsSource).Refresh();
        }
    }
}


using System;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WpfResources._32691328
{
    public class DataStore
    {
        ObservableCollection<Part> _parts;
        public ObservableCollection<Part> Parts { get { return _parts; } set { _parts = value; } }

        public DataStore() {

            List<PARTIES_V1> p1 = new List<PARTIES_V1>();
            p1.Add(new PARTIES_V1() { ID = 1999 });
            p1.Add(new PARTIES_V1() { ID = 1785 });
            p1.Add(new PARTIES_V1() { ID = 1123 });

            List<PARTIES_V1> p2 = new List<PARTIES_V1>();
            p2.Add(new PARTIES_V1() { ID = 289 });
            p2.Add(new PARTIES_V1() { ID = 2644 });
            p2.Add(new PARTIES_V1() { ID = 2321 });

            List<PARTIES_V1> p3 = new List<PARTIES_V1>();
            p3.Add(new PARTIES_V1() { ID = 3754 });
            p3.Add(new PARTIES_V1() { ID = 37543 });
            p3.Add(new PARTIES_V1() { ID = 31333 });

            _parts = new ObservableCollection<Part>();
            _parts.Add(new Part(1, "123", "1abc", 111, p1));
            _parts.Add(new Part(5, "3453", "2abc", 111, p2));
            _parts.Add(new Part(7, "13433", "3abc", 111, p3));
            _parts.Add(new Part(8, "2223", "4abc", 111, p1));
            _parts.Add(new Part(10, "155553", "5abc", 111, p3));
            _parts.Add(new Part(11, "122223", "6abc", 111, p2));

        }
    }

    public class Part
    {
        public Part(int id, string pnumber, string owner, int? priceid,
            List<PARTIES_V1> lparties)
        {
            ID = id;
            PART_NUMBER = pnumber;
            OWNER = owner;
            PRICE_ID = priceid;
            PARTIES_V1 = lparties;
        }
        public int ID { get; set; }

        public string PART_NUMBER { get; set; }

        public string OWNER { get; set; }

        public int? PRICE_ID { get; set; }

        public List<PARTIES_V1> PARTIES_V1 { get; set; }
    }

    public class PARTIES_V1
    {

        public int ID { get; set; }

    }
}

** VM支持的新答案**

<Window x:Class="WpfResources._32691328.Win32691328"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Win32691328" Height="661.015" Width="506.391">

  <StackPanel>
    <DataGrid x:Name="dataGridMaster" AutoGenerateColumns="True" EnableRowVirtualization="True"                    
            RowDetailsVisibilityMode="VisibleWhenSelected" />
    <Button Content="UpdatePart" Click="Button_Click"/>
    <DataGrid x:Name="dataGridDetail" Margin="0 10 0 0" IsReadOnly="True" SelectionMode="Single" AutoGenerateColumns="True" 
        EnableRowVirtualization="True" 
         IsSynchronizedWithCurrentItem="True" 
        RowDetailsVisibilityMode="VisibleWhenSelected"/>
   </StackPanel>    
</Window>

using System;
using System.Collections;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;

namespace WpfResources._32691328
{
    /// <summary>
    /// Interaction logic for Win32691328.xaml
    /// </summary>
    public partial class Win32691328 : Window
    {
        DataStore d;

        public Win32691328()
        {
            InitializeComponent();

            d = new DataStore();
            this.DataContext = d;

            // Bind ItemsSource of both Grids

            Binding bi1 = new Binding();
            bi1.Source = d.PartsView;
            bi1.Mode = BindingMode.OneWay;
            BindingOperations.SetBinding(dataGridMaster, DataGrid.ItemsSourceProperty, bi1);

            Binding bi2 = new Binding();
            bi2.Source = d.PartiesDetailView;
            bi2.Mode = BindingMode.OneWay;
            BindingOperations.SetBinding(dataGridDetail, DataGrid.ItemsSourceProperty, bi2);
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            d.Change();           
        }
    }
}

using System;
using System.ComponentModel;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Windows.Data;

namespace WpfResources._32691328
{
    public class DataStore
    {
        ObservableCollection<Part> _parts;
        public ObservableCollection<Part> Parts { get { return _parts; } set { _parts = value; } }

        CollectionViewSource _partsViewMaster;
        public CollectionViewSource PartsView
        {
            get { return _partsViewMaster; }
        }

        CollectionViewSource _partsDetailView;
        public CollectionViewSource PartiesDetailView
        {
            get { return _partsDetailView; }
        }

        public DataStore() {

            _partsViewMaster = new CollectionViewSource();
            _partsDetailView = new CollectionViewSource();          

            List<PARTIES_V1> p1 = new List<PARTIES_V1>();
            p1.Add(new PARTIES_V1() { ID = 1999 });
            p1.Add(new PARTIES_V1() { ID = 1785 });
            p1.Add(new PARTIES_V1() { ID = 1123 });

            List<PARTIES_V1> p2 = new List<PARTIES_V1>();
            p2.Add(new PARTIES_V1() { ID = 289 });
            p2.Add(new PARTIES_V1() { ID = 2644 });
            p2.Add(new PARTIES_V1() { ID = 2321 });

            List<PARTIES_V1> p3 = new List<PARTIES_V1>();
            p3.Add(new PARTIES_V1() { ID = 3754 });
            p3.Add(new PARTIES_V1() { ID = 37543 });
            p3.Add(new PARTIES_V1() { ID = 31333 });

            _parts = new ObservableCollection<Part>();
            _parts.Add(new Part(1, "123", "1abc", 111, p1));
            _parts.Add(new Part(5, "3453", "2abc", 111, p2));
            _parts.Add(new Part(7, "13433", "3abc", 111, p3));
            _parts.Add(new Part(8, "2223", "4abc", 111, p1));
            _parts.Add(new Part(10, "155553", "5abc", 111, p3));
            _parts.Add(new Part(11, "122223", "6abc", 111, p2));


            Binding bc1 = new Binding("Parts");
            bc1.Source = this;
            BindingOperations.SetBinding(_partsViewMaster, CollectionViewSource.SourceProperty, bc1);

            Binding bc2 = new Binding("PARTIES_V1");
            bc2.Source = _partsViewMaster;
            BindingOperations.SetBinding(_partsDetailView, CollectionViewSource.SourceProperty, bc2);
        }

        public void Change()
        {
            // Do some changes

            List<PARTIES_V1> p = new List<PARTIES_V1>();
            p.Add(new PARTIES_V1() { ID = -1999 });
            p.Add(new PARTIES_V1() { ID = -1785 });
            p.Add(new PARTIES_V1() { ID = -1123 });

            _parts[0].PARTIES_V1 = p;

            // recreate view
            _partsViewMaster.View.Refresh();
        }
    }

    public class Part
    {
        public Part(int id, string pnumber, string owner, int? priceid,
            List<PARTIES_V1> lparties)
        {
            ID = id;
            PART_NUMBER = pnumber;
            OWNER = owner;
            PRICE_ID = priceid;
            PARTIES_V1 = lparties;
        }
        public int ID { get; set; }

        public string PART_NUMBER { get; set; }

        public string OWNER { get; set; }

        public int? PRICE_ID { get; set; }

        List<PARTIES_V1> _parties = new List<PARTIES_V1>();
        public List<PARTIES_V1> PARTIES_V1 { get { return _parties; } set { _parties = value; } }

    }

    public class PARTIES_V1
    {

        public int ID { get; set; }

    }
}