The DataGrid is not update with real-time changes about avalonia

[rabbitism]

How is IsChecked defined?

[timunie]

The row ViewModel needs to be ObservableObject as well. That's by design.

[Nanech]

Thank you for your kind advice and your willingness to help me.

You asked me about the implementation of the IsChecked property. Here is my class that is part of the ObservableCollection:

public partial class Student : ObservableObject, INotifyPropertyChanged
{
    public int StudentId { get; set; }
    public string Name { get; set; } = null!;
    public string Surname { get; set; } = null!;
    public int StudentGroupId { get; set; }
    public string Patronymic { get; set; } = null!;
    public short AdmissionDate { get; set; }
    public int StudentStatusId { get; set; }
    public string Fio { get; set; } = null!;
    public virtual Group? StudentGroup { get; set; }
    public virtual StudentsStatus? StudentStatus { get; set; }
    public virtual ICollection<StudentsAndPayment> StudentsAndPayments { get; set; } = new List<StudentsAndPayment>();
    
    bool _isChecked = false;
    [NotMapped]
    public bool IsChecked { get => _isChecked; set { _isChecked = value; OnPropertyChanged(nameof(IsChecked)); } }
    
    public event PropertyChangedEventHandler PropertyChanged;
    
    protected virtual void OnPropertyChanged(string propertyName)
    {
      PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
    
    public bool Equals(Student other)
    {
      if (other == null) return false;
      return Fio == other.Fio && StudentGroupId == other.StudentGroupId && StudentStatusId == other.StudentStatusId && AdmissionDate == other.AdmissionDate && Name == other.Name &&
          Surname == other.Surname && Patronymic == other.Patronymic;
    }
}

I think this is not the best solution, as INotifyPropertyChanged is already present. Is there any way to mark the field "_isChecked" as an [ObservableProperty] and [NotMapped]? I need it in my case...

[Nanech]

Okay, I've just figured it out. Thanks!

public partial class Student : ObservableObject
{
    public int StudentId { get; set; }
    public string Name { get; set; } = null!;
    public string Surname { get; set; } = null!;
    public int StudentGroupId { get; set; }
    public string Patronymic { get; set; } = null!;
    public short AdmissionDate { get; set; }
    public int StudentStatusId { get; set; }
    public string Fio { get; set; } = null!;
    public virtual Group? StudentGroup { get; set; }
    public virtual StudentsStatus? StudentStatus { get; set; }
    public virtual ICollection<StudentsAndPayment> StudentsAndPayments { get; set; } = new List<StudentsAndPayment>();
    
    [ObservableProperty]
    [property: NotMapped]
    bool _isChecked = false;

    public bool Equals(Student other)
    {
      if (other == null) return false;
      return Fio == other.Fio && StudentGroupId == other.StudentGroupId && StudentStatusId == other.StudentStatusId && AdmissionDate == other.AdmissionDate && Name == other.Name &&
          Surname == other.Surname && Patronymic == other.Patronymic;
    }
}