如何将一个项目从一个数据网格添加到另一个数据网格，然后在 WPF 中编辑它

Question

当我尝试使用 datagrid.items.add() 将项目从一个数据网格添加到另一个数据网格时遇到问题。基本上我有两个数据网格以主从关系起作用。第一个 DataGrid1 用于显示自动生成的列和行。第二个数据网格 DataGrid2 将在单击特定按钮时显示 DataGrid1.SelectedItems。每次单击该按钮时，我希望将 DataGrid1 中的选定项目保留在 DataGrid2 中，并且每次单击该按钮时，都会将更多项目添加到 DataGrid2 中。除了能够在 DataGrid2 上编辑单元格之外，我已经能够完成大部分要求。当我双击 DataGrid2 中的单元格时，出现异常，提示“此视图不允许 EditItem”。我读过很多关于将数据添加到 ObservableCollection、ListCollectionView 等的文章，但要么我无法以正确的方式实现它们，要么不适合我的情况。我的代码如下，顺便提前谢谢

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
<Grid>
    <DataGrid AutoGenerateColumns="False" Height="77" HorizontalAlignment="Left" Margin="27,12,0,0" Name="dataGrid1" VerticalAlignment="Top" Width="464" />
    <Button Content="AddRow" Height="23" HorizontalAlignment="Left" Margin="27,107,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" />
    <DataGrid AutoGenerateColumns="False" Height="140" HorizontalAlignment="Left" Margin="27,159,0,0" Name="dataGrid2" VerticalAlignment="Top" Width="464" />
</Grid>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
    /// 
    /// Interaction logic for MainWindow.xaml
    /// 
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            dataGrid1.ItemsSource = idata;

        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            foreach (latlongobj item in dataGrid1.SelectedItems)
            {
                dataGrid2.Items.Add(item);

            }

        }
    }
}

---

---

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace WpfApplication1
{
    class latlonobj
    {
        public string name { get; set; }
        public double Lat { get; set; }
        public double Lon { get; set; }
    }
}

Answer 1

这是你想要的吗？

公共部分类 MainWindow : 窗口
{
ObservableCollection dataGrid2Items = new ObservableCollection();

    public MainWindow()
    {
        InitializeComponent();
        dataGrid1.ItemsSource = idata;
        dataGrid2.ItemsSource = dataGrid2Items;
    }

    private void button1_Click(object sender, RoutedEventArgs e)
    {
        foreach (latlongobj item in dataGrid1.SelectedItems)
        {
            if( !dataGrid2Items.Contains( item ) )
                dataGrid2Items.Add(item);
        }

    }

    private ObservableCollection<latlongobj> idata = new ObservableCollection<latlongobj>
        {
            new latlongobj{ name = "n1", Lat = 1, Lon = 2 },
            new latlongobj{ name = "n2", Lat = 2, Lon = 3 },
            new latlongobj{ name = "n3", Lat = 4, Lon = 5 },
        };