private void Submit(object sender, EventArgs e)
{
using (UniversityDataContext context = new UniversityDataContext(App.UniversityconnectionString))
{
Student st = new Student() { ID = Int32.Parse(ID_text.Text), Name = Name_text.Text, LastName = LastName_text.Text };
context.Students.InsertOnSubmit(st);
context.SubmitChanges();
MessageBox.Show("Student Added Successfully");
}
}
private void Submit(object sender, EventArgs e)
{
using (UniversityDataContext context = new UniversityDataContext(App.UniversityconnectionString))
{
Student st = new Student()
{
ID = Int32.Parse(ID_text.Text), Name = Name_text.Text, LastName = LastName_text.Text
};
context.Students.InsertOnSubmit(st);
context.SubmitChanges();
MessageBox.Show("Student Added Successfully");
}
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
using (UniversityDataContext context = new UniversityDataContext(App.UniversityconnectionString))
{
var StudentLoaded = (from Stud in context.Students where Stud.ID == Int32.Parse(ID_txt.Text) select Stud).FirstOrDefault();
if (StudentLoaded != null)
{
StudentLoaded.Name = Name_txt.Text;
StudentLoaded.LastName = LastName_txt.Text;
context.SubmitChanges();
}
}
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
using (UniversityDataContext context = new UniversityDataContext(App.UniversityconnectionString))
{
var StudentLoaded = (from Stud in context.Students where Stud.ID == Int32.Parse(ID_txt.Text) select Stud).FirstOrDefault();
if (StudentLoaded != null)
{
StudentLoaded.Name = Name_txt.Text;
StudentLoaded.LastName = LastName_txt.Text;
context.SubmitChanges();
}
}
}
private void DeleteRegister(object sender, EventArgs e)
{
if (StudentListBox.SelectedIndex!=-1)
{
Student st = (Student)StudentListBox.SelectedItem;
using (UniversityDataContext context = new UniversityDataContext(App.UniversityconnectionString))
{
context.Students.Attach(st);
context.Students.DeleteOnSubmit(st);
context.SubmitChanges();
MessageBox.Show("Student Deleted Successfully");
StudentListBox.ItemsSource = null;
LoadStudents();
}
}
else
{
MessageBox.Show("A Student must be selected in order to delete it!");
}
}
private void DeleteRegister(object sender, EventArgs e)
{
if (StudentListBox.SelectedIndex != -1)
{
Student st = (Student)StudentListBox.SelectedItem;
using (UniversityDataContext context = new UniversityDataContext(App.UniversityconnectionString))
{
context.Students.Attach(st);
context.Students.DeleteOnSubmit(st);
context.SubmitChanges();
MessageBox.Show("Student Deleted Successfully");
StudentListBox.ItemsSource = null;
LoadStudents();
}
}
else
{
MessageBox.Show("A Student must be selected in order to delete it!");
}
}
