private void LoadStudents()
{
Task.Run(() => {
try
{
var students = _model.GetStudents();
if (students == null)
{
return;
}
List <StudentWrapper> wrappers = new List <StudentWrapper>();
foreach (var item in students)
{
StudentWrapper wrapper = new StudentWrapper();
wrapper.Student = item;
wrapper.RemoveCmd = new BaseCommand(() => { RemoveCmdExecute(wrapper); });
wrapper.EditCmd = new BaseCommand(() => { EditCmdExecute(wrapper); });
wrappers.Add(CreateStudentWraper(item));
}
App.Current.Dispatcher.Invoke(() => {
Students = new ObservableCollection <StudentWrapper>(wrappers);
Students.CollectionChanged += Students_CollectionChanged;
});
}
catch { }
});
}
private StudentWrapper CreateStudentWraper(Student student)
{
StudentWrapper wrapper = new StudentWrapper();
wrapper.Student = student;
wrapper.RemoveCmd = new BaseCommand(() => { RemoveCmdExecute(wrapper); });
wrapper.EditCmd = new BaseCommand(() => { EditCmdExecute(wrapper); });
return(wrapper);
}
private void EditCmdExecute(StudentWrapper item)
{
Student _edit = new Student();
_edit.Id = item.Student.Id;
_edit.Age = item.Student.Age;
_edit.FirstName = item.Student.FirstName;
_edit.Gender = item.Student.Gender;
_edit.Last = item.Student.Last;
App.Current.Dispatcher.Invoke(() => {
EditableStudent = _edit;
});
}
private void RemoveCmdExecute(StudentWrapper item)
{
try
{
if (MessageBox.Show("Вы точно хотите удалить пользователя?", "Сообщение", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
{
var stds = GetStudentsFromWrappers().Where(i => i != item.Student);
_model.SaveChanges(stds);
App.Current.Dispatcher.Invoke(() =>
{
Students.Remove(item);
if (EditableStudent != null && EditableStudent.Id == item.Student.Id)
{
EditableStudent = null;
}
});
}
}
catch { }
}