private void ContactDetailsToolStripMenuItem_Click(object sender, EventArgs e)
{
//check if an item is selected in the lsitbox
int index = ContactDisplayListBoz.SelectedIndex;
if (index == -1)
{
MessageBox.Show("You must select an item to view Contact Details");
return;
}
//check if the user selected more than one item
if (ContactDisplayListBoz.SelectedItems.Count > 1)
{
MessageBox.Show("You must select one item to view the contact details");
return;
}
//instantiate the base class object
EducationPerson person = educationPeople[index];
//add the object to the dialogue by calling the method
if (person is Faculty)
{
showFacultyContact(index);
}
else if (person is Student)
{
showStudentContact(index);
}
else
{
MessageBox.Show("Unknown Contact details cannot be displayed");
return;
}
}
private void EditContactToolStripMenuItem_Click(object sender, EventArgs e)
{
int index = ContactDisplayListBoz.SelectedIndex;
if (index == -1)
{
MessageBox.Show("You must select an item to edit or update");
return;
}
//check if the user selected more than one item
if (ContactDisplayListBoz.SelectedItems.Count > 1)
{
MessageBox.Show("You must select one item to edit or update");
return;
}
EducationPerson person = educationPeople[index];
if (person is Faculty)
{
editFaculty(index);
changesMade = true;
}
else if (person is Student)
{
editStudent(index);
changesMade = true;
}
else
{
MessageBox.Show("Unknown Contact details to be edited");
}
}
private void DeleteContactToolStripMenuItem_Click(object sender, EventArgs e)
{
//check to see if the user selcted an item
//before performing the delete opertaion
int index = ContactDisplayListBoz.SelectedIndex;
if (index == -1)
{
MessageBox.Show("You must select an item to be deleted");
return;
}
//check if the user selected more than one item
if (ContactDisplayListBoz.SelectedItems.Count > 1)
{
MessageBox.Show("You must select one item to delete");
return;
}
//pop confirmation dialogue that the item is about to be deleted
EducationPerson person = educationPeople[index];
if (DialogResult.Yes != MessageBox.Show($"Are you sure you wish to delete {person.FirstName}'s details?",
"Confirmation", MessageBoxButtons.YesNo))
{
return;
}
//delete the item and remote it from the education people list
//remove it from the listbox display as well
educationPeople.RemoveAt(index);
ContactDisplayListBoz.Items.RemoveAt(index);
changesMade = true;
}
private void OpenToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Title = "Open a File";
ofd.Filter = "Text Files|*.txt|All Files|*.*";
ofd.FilterIndex = 1;
DialogResult result = ofd.ShowDialog();
if (result != DialogResult.OK)
{
return;
}
EducationPerson person = null;
Filepath = ofd.FileName.ToString(); //save the current file path into the filapath variable.
try
{
StreamReader input = new StreamReader(ofd.FileName);
while (!input.EndOfStream)
{
string personType = input.ReadLine();
switch (personType)
{
case "FACULTY":
person = new Faculty(input.ReadLine());
break;
case "STUDENT":
person = new Student(input.ReadLine());
break;
default:
MessageBox.Show("Unknown Person in the file");
person = null;
break;
}
if (person != null)
{
educationPeople.Add(person);
ContactDisplayListBoz.Items.Add(person.ToFormattedString());
}
}
input.Close();
}
catch (Exception excp)
{
MessageBox.Show($"File failed to load. {excp.Message}");
return;
}
}
//this method differentiates btween faculty and student
//by writing faculty above before the data is inserted
private string personTypeString(EducationPerson p)
{
if (p is Faculty)
{
return("FACULTY");
}
else if (p is Student)
{
return("STUDENT");
}
else
{
return("UNKNOWN");
}
}