// calls to delete the product with that name
private void btnDelete_Click(object sender, EventArgs e)
{
ClearErrors();
// get the name of the product to be deleted
string inputName = txtName.Text + "".Trim();
if (string.IsNullOrWhiteSpace(inputName))
{
lblErrors.Text = "Need a name to remove.\n";
return;
}
List <GBRProduct> products = (List <GBRProduct>)lstProducts.DataSource;
GBRProduct inFile = products.FirstOrDefault(p => p.ProductName.ToLower().Equals(inputName.ToLower()));
if (inFile is null)
{
lblErrors.Text = "Product doesn't exist.\n";
return;
}
try
{
inFile.GBRDelete(inFile);
ReloadListBox();
lblErrors.Text = $"{inputName} was successfully deleted.\n";
}
catch (Exception ex)
{
lblErrors.Text = ex.Message;
}
}
// save a new product or update the current product
private void btnSave_Click(object sender, EventArgs e)
{
ClearErrors();
try
{
ValidateForm();
// if valid... instantiate and save.
string inputName = txtName.Text + "".Trim(), inputDescription = txtDescription.Text + "".Trim(), inputPrice = txtPrice.Text + "".Trim(), inputFactor = txtFactor.Text + "".Trim();
var product = GBRProduct.Parse(inputName + "\t" + inputPrice + "\t" + inputFactor + "\t" + chkTopping.Checked.ToString() + "\t" + inputDescription);
if (GBRProduct.GBRGetByProductName(inputName) is null)
{
product.GBRAdd(product);
lblErrors.Text = $"Add {inputName} to file successfully.";
ReloadListBox(inputName);
//lstProducts.SelectedValue = inputName;
}
else
{
DialogResult result = MessageBox.Show($"Do you want to update the product {inputName}?", "Update product", MessageBoxButtons.YesNo);
if (result == DialogResult.Yes)
{
product.GBRUpdate(product);
lblErrors.Text = $"Updated {inputName} to file successfully.";
ReloadListBox(inputName);
}
}
}
catch (Exception ex)
{
lblErrors.Text += ex.Message;
}
}
// Fill the form with the Product information
private void FillTheForm(GBRProduct product)
{
ClearErrors();
txtName.Text = product.ProductName;
txtPrice.Text = product.Price.ToString("F2", CULTURE.NumberFormat);
txtFactor.Text = product.CostFactorForToppings.ToString("F2", CULTURE.NumberFormat);
txtDescription.Text = product.Description;
chkTopping.Checked = product.IsPizzaTopping;
}
// Reloads the list box using a optional key
private void ReloadListBox(string key = "")
{
List <GBRProduct> products = GBRProduct.GBRGetProducts();
products = products.OrderBy(p => p.ProductName).ToList();
lstProducts.DisplayMember = "ProductName";
lstProducts.ValueMember = "ProductName";
lstProducts.DataSource = products;
if (key != "")
{
lstProducts.SelectedValue = key;
}
}
// Use case of selecting some item in the list box
private void lstProducts_SelectedIndexChanged(object sender, EventArgs e)
{
ClearErrors();
var input = lstProducts.SelectedValue.ToString();
var product = GBRProduct.GBRGetByProductName(input);
if (product is null)
{
lblErrors.Text = "Can't find the product.\n";
}
else
{
FillTheForm(product);
}
}