private void Students_AfterCollectionChange(object sender, ReportingCollectionEventArgs e)
{
if (e.Action == ReportingCollectionAction.Add)
{
index++;
}
}
private void Subjects_BeforeCollectionChange(object sender, ReportingCollectionEventArgs e)
{
Subject subject = e.Item as Subject;
if (Subjects.Any(s => s.Name == subject.Name))
{
e.Cancel = true;
}
}
private void Students_BeforeCollectionChange(object sender, ReportingCollectionEventArgs e)
{
Student student = e.Item as Student;
if (Students.ContainsValue(student))
{
e.Cancel = false;
}
}
private void Classes_BeforeCollectionChange(object sender, ReportingCollectionEventArgs e)
{
Class @class = e.Item as Class;
if (ClassExist(@class.Name))
{
e.Cancel = true;
}
}
