private async void Create_UpdateSpecializationButton_Click(object sender, RoutedEventArgs e)
{
using (UniversityEntities en = new UniversityEntities())
{
if (Create_UpdateSpecializationButton.Content.ToString() == "Create")
{
en.Specializations.Add(new Specialization {
Name = Create_UpdateSpecializatinTextBox.Text
});
}
else if (Create_UpdateSpecializationButton.Content.ToString() == "Update")
{
int outId;
if (!int.TryParse(UpdateSpecializatinID.Text, out outId))
{
return;
}
en.Specializations.Where(q => q.Id == outId).FirstOrDefault().Name = Create_UpdateSpecializatinTextBox.Text;
}
await en.SaveChangesAsync();
}
}
private async void Create_UpdateSpecializationButton_Click(object sender, RoutedEventArgs e)
{
using (UniversityEntities en = new UniversityEntities())
{
int AOH = -1;
int SpId = -1;
if (Create_UpdateSpecializationButton.Content.ToString() == "Create")
{
if (!int.TryParse(Create_UpdateSpecializatinTextBoxAmounthOfHour.Text, out AOH) ||
!int.TryParse(Create_UpdateSpecializatinTextBoxSpecialization_Id.Text, out SpId))
{
MessageBox.Show("Inkorect Inputed data");
return;
}
en.Subjects.Add(new Subject {
Name = Create_UpdateSpecializatinTextBoxName.Text, AmountOfHour = AOH, Specialization_Id = SpId
});
}
else if (Create_UpdateSpecializationButton.Content.ToString() == "Update")
{
int outId;
if ((!int.TryParse(UpdateSpecializatinID.Text, out outId) ||
!int.TryParse(Create_UpdateSpecializatinTextBoxAmounthOfHour.Text, out AOH) ||
!int.TryParse(Create_UpdateSpecializatinTextBoxSpecialization_Id.Text, out SpId)) &&
en.Subjects.Where(q => q.Id == outId).Count() > 0)
{
MessageBox.Show("Inkorect Inputed data");
return;
}
var sub = en.Subjects.Where(q => q.Id == outId).FirstOrDefault();
sub.Name = Create_UpdateSpecializatinTextBoxName.Text;
sub.AmountOfHour = AOH;
sub.Specialization_Id = SpId;
}
await en.SaveChangesAsync();
}
}
private async void Button_Click_2(object sender, RoutedEventArgs e)
{
using (UniversityEntities en = new UniversityEntities())
{
List <int> DelId = new List <int>();
int id;
switch (TabControl.SelectedIndex)
{
case 0:
foreach (var i in StusentListView.SelectedItems)
{
try
{
id = int.Parse(i.ToString().Remove(i.ToString().IndexOf("#")));
}
catch
{
continue;
}
var res = en.Students.Where(q => q.Id == id)?.FirstOrDefault();
if (res == null)
{
continue;
}
en.Students.Remove(res);
}
break;
case 1:
foreach (var i in SpecializationListView.SelectedItems)
{
try
{
id = int.Parse(i.ToString().Remove(i.ToString().IndexOf("#")));
}
catch
{
continue;
}
var res = en.Specializations.Where(q => q.Id == id).FirstOrDefault();
if (res == null)
{
continue;
}
en.Specializations.Remove(res);
}
break;
case 2:
foreach (var i in SubjectListView.SelectedItems)
{
try
{
id = int.Parse(i.ToString().Remove(i.ToString().IndexOf("#")));
}
catch
{
continue;
}
var res = en.Subjects.Where(q => q.Id == id)?.FirstOrDefault();
if (res == null)
{
continue;
}
en.Subjects.Remove(res);
}
break;
}
try
{
await en.SaveChangesAsync();
}
catch
{
MessageBox.Show("Selected item(s) is not deleted because is foreign key use");
}
}
}