// 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;
}
}
// 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);
}
}