public bool Remove(Student st)
{
bool b = false;
foreach (var s in list.Where(kpv => kpv.Value == st).ToList())
{
list.Remove(s.Key);
StudentChanged?.Invoke(this, new StudentsChangedEventArgs <TKey>(CollectionName, Action.Remove, "Element was removed", s.Key));
s.Value.PropertyChanged -= PropChanged;
b = true;
}
return(b);
}
public Student this[TKey index]
{
get
{
return(list[index]);
}
set
{
try
{
list[index] = value;
list[index].PropertyChanged += PropChanged;
StudentChanged?.Invoke(this, new StudentsChangedEventArgs <TKey>(CollectionName, Action.Property, "Element was changed", index));
StudentReferenceChanged?.Invoke(this, new StudentListHandlerEventArgs(CollectionName, "Element was changed", list[index]));
}
catch { }
}
}
public void AddStudents(TKey key, params Student[] arr)
{
if (arr.Length == 0)
{
arr = new Student[0];
StudentsCountChanged?.Invoke(this, new StudentListHandlerEventArgs(CollectionName, "Added new element", arr[0]));
}
if (list == null)
{
list = new Dictionary <TKey, Student>();
}
for (int i = 0; i < arr.Length; i++)
{
list.Add(key, arr[i]);
StudentsCountChanged?.Invoke(this, new StudentListHandlerEventArgs(CollectionName, "Added new element", arr[i]));
StudentChanged?.Invoke(this, new StudentsChangedEventArgs <TKey>(CollectionName, Action.Add, "Added new element", key));
list[key].PropertyChanged += PropChanged;
}
}
public void PropChanged(object sender, PropertyChangedEventArgs e)
{
TKey key = list.FirstOrDefault(i => i.Value.Equals(sender)).Key;
StudentChanged?.Invoke(this, new StudentsChangedEventArgs <TKey>(CollectionName, Action.Property, e.PropertyName, key));
}