WPF DataGridComboBoxColumn's itemsource is class collection which has multiple properties and display one

While when DataGridComboBoxColumn binding to a class collection,for example it will bind to class country which has CountryName and CountryCode properties,while it only displays CountryName

Be cautious,the DataGridComboBoxColumn's item source must be static properties and initialize in static constructor.

From another perspective,we must believe that the Microsoft has provider a suite of controls to develop various applications in wpf, and validated useful and correct in engineering practice.I will presen the demo

XAML

<Window x:Class="WpfApp57.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp57"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <DataGrid SelectionMode="Single" IsReadOnly="False" AutoGenerateColumns="False"
                  ItemsSource="{Binding UsersList,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" CellEditEnding="DataGrid_CellEditEnding">
            <DataGrid.Columns>
                <DataGridTemplateColumn Header="Nation">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Nation,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                    <DataGridTemplateColumn.CellEditingTemplate>
                        <DataTemplate>
                            <ComboBox ItemsSource="{Binding Source={x:Static local:MainWindow.NationsList}}" SelectedIndex="0" SelectedValue="{Binding Nation,UpdateSourceTrigger=LostFocus}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellEditingTemplate>
                </DataGridTemplateColumn>
                <DataGridCheckBoxColumn Header="CanEnglish" IsThreeState="False" Binding="{Binding CanEnglish,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
                <DataGridTextColumn Header="Name"  Binding="{Binding Name,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
            </DataGrid.Columns>
        </DataGrid>         
    </Grid>
</Window>

.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.ComponentModel;
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.Navigation;
using System.Windows.Shapes;

namespace WpfApp57
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public static List<string> NationsList { get; set; }
        public List<User> UsersList { get; set; }
        static MainWindow()
        {
            NationsList = new List<string> { "USA", "UK", "JAPAN" };
        }

        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = this;
            InitDataSource(); 
        }

        private void InitDataSource()
        {
            UsersList = new List<User>();
            UsersList.Add(new User()
            {
                Nation = NationsList[0],
                Name = "Fred1",
                CanEnglish = true
            });

            UsersList.Add(new User()
            {
                Nation = NationsList[1],
                Name = "Fred2",
                CanEnglish = true
            });

            UsersList.Add(new User()
            {
                Nation = NationsList[2],
                Name = "Fred3",
                CanEnglish = true
            });

        }

        private void DataGrid_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
        {
            string jsonValue = JsonConvert.SerializeObject(UsersList, Formatting.Indented);
            MessageBox.Show(jsonValue);
        }
    }

    public class User 
    {        
        public string Nation { get; set; }
        public string Name { get; set; }
        public bool CanEnglish { get; set; }
    }    
}

The key part located at

  <DataGridTemplateColumn Header="Nation">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Nation,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                    <DataGridTemplateColumn.CellEditingTemplate>
                        <DataTemplate>
                            <ComboBox ItemsSource="{Binding Source={x:Static local:MainWindow.NationsList}}" SelectedIndex="0" SelectedValue="{Binding Nation,UpdateSourceTrigger=LostFocus}"/>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellEditingTemplate>
                </DataGridTemplateColumn>