/// <summary>
/// When the user clicks the Add Electronic button, if the variable existingElec
/// is null it means the electronic being added is a new one so it is added to the database.
/// If it is not null, it already exists in the database and is being updated instead.
/// </summary>
private void addElectCmd_Click(object sender, EventArgs e)
{
if (existingElec == null)
{
Electronic electToAdd = new Electronic();
electToAdd.Name = nameTxt.Text;
electToAdd.Manufacturer = manufactTxt.Text;
electToAdd.Price = Convert.ToDouble(priceTxt.Text);
electToAdd.Category = Validation.casingWords(categoryCbx.Text);
ElectronicDb.Add(electToAdd);
}
else
{
existingElec.Name = nameTxt.Text;
existingElec.Manufacturer = manufactTxt.Text;
existingElec.Price = Convert.ToDouble(priceTxt.Text);
existingElec.Category = Validation.casingWords(categoryCbx.Text);
ElectronicDb.Update(existingElec);
MessageBox.Show("Successfully updated item " + existingElec.Name);
}
Close();
}
/// <summary>
/// When the Add Electronics button is clicked, open up a new form
/// and then repopulate the list when it is closed.
/// </summary>
private void addElectCmd_Click(object sender, EventArgs e)
{
addElectFrm addForm = new addElectFrm();
addForm.ShowDialog();
List <Electronic> allElectronics = ElectronicDb.GetAllElectronics();
populateList(allElectronics);
}
/// <summary>
/// When the Update Electronic button is pressed, open up a new form
/// with the information of that electronic already populated. The user may
/// then update any information regarding the electronic. After closing,
/// the listbox is once again repopulated. Displays an error
/// message if there is no electronic selected.
/// </summary>
private void updateElectCmd_Click(object sender, EventArgs e)
{
if (productLstBox.SelectedIndex < 0)
{
MessageBox.Show("You must choose a product to update.");
return;
}
Electronic electToUpdate = productLstBox.SelectedItem as Electronic;
addElectFrm updateForm = new addElectFrm(electToUpdate);
updateForm.ShowDialog();
populateList(ElectronicDb.GetAllElectronics());
}
/// <summary>
/// Populate the listbox with the list that is passed in.
/// </summary>
/// <param name="allElectronics">The list used to populate the listbox</param>
private void populateList(List <Electronic> allElectronics)
{
productLstBox.Items.Clear();
foreach (String cat in ElectronicDb.GetAllCategories())
{
productLstBox.Items.Add(Validation.casingWords(cat));
foreach (Electronic elect in allElectronics)
{
if (elect.Category == cat)
{
productLstBox.Items.Add(elect);
}
}
}
}
/// <summary>
/// When the Delete Electronic button is pressed, a message box is
/// presented that prompts the user whether to actually delete the electronic or not.
/// If yes is clicked, then the electronic is deleted from the database. Once again,
/// the listbox is repopulated if the user clicks yes. Displays an error message if
/// there is no electronic selected.
/// </summary>
private void deleteElectCmd_Click(object sender, EventArgs e)
{
if (productLstBox.SelectedIndex < 0)
{
MessageBox.Show("You must select a product to delete.");
return;
}
Electronic elecToDelete = productLstBox.SelectedItem as Electronic;
DialogResult result = MessageBox.Show(
text: $"Are you sure you want to delete {elecToDelete.ProductId}:{elecToDelete.Manufacturer}:{elecToDelete.Name}",
caption: "Delete?",
buttons: MessageBoxButtons.YesNo,
icon: MessageBoxIcon.Warning);
if (result == DialogResult.Yes)
{
ElectronicDb.Delete(elecToDelete.ProductId);
populateList(ElectronicDb.GetAllElectronics());
}
}
private void addElectFrm_Load(object sender, EventArgs e)
{
List <String> allCategories = ElectronicDb.GetAllCategories();
populateList(allCategories, categoryCbx);
}
/// <summary>
/// When the form loads, call a method to get all the electronics from the database
/// and populate the listbox with them.
/// </summary>
private void MainForm_Load(object sender, EventArgs e)
{
List <Electronic> allElectronics = ElectronicDb.GetAllElectronics();
populateList(allElectronics);
}