WPF DataGrid根据更改更新所有行。

// 定义一个数据模型类
public class Person : INotifyPropertyChanged
{
    private string name;
    public string Name
    {
        get { return name; }
        set
        {
            if (name != value)
            {
                name = value;
                OnPropertyChanged(nameof(Name));
            }
        }
    }

    private int age;
    public int Age
    {
        get { return age; }
        set
        {
            if (age != value)
            {
                age = value;
                OnPropertyChanged(nameof(Age));
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

// 在窗口的代码-behind中，创建数据源并绑定到DataGrid
public partial class MainWindow : Window
{
    private ObservableCollection<Person> people;

    public MainWindow()
    {
        InitializeComponent();

        // 创建数据源
        people = new ObservableCollection<Person>
        {
            new Person { Name = "John", Age = 25 },
            new Person { Name = "Jane", Age = 30 },
            new Person { Name = "Bob", Age = 35 }
        };

        // 将数据源绑定到DataGrid
        dataGrid.ItemsSource = people;
    }

    // 当点击按钮时，更新数据源中的某个属性值
    private void UpdateData_Click(object sender, RoutedEventArgs e)
    {
        // 假设更新第一个人的年龄
        people[0].Age = 26;
    }
}