private void frmProduct_Supplier_Activated(object sender, EventArgs e)
{
products = ProductsDB.GetProducts(); //All the products are retreived using ProductsDB.GetProducts()
suppliers = SuppliersDB.GetSuppliers(); //All the suppliers are retreived using SuppliersDB.GetSuppliers()
ReloadListboxes();
}
//* Overall button controls *//
//This method controls the show all button. When this button is clicked all the products and suppliers will be shown in the
//listboxes
private void btnShowAll_Click(object sender, EventArgs e)
{
products = ProductsDB.GetProducts(); //All the products are retreived using ProductsDB.GetProducts()
suppliers = SuppliersDB.GetSuppliers(); //All the suppliers are retreived using SuppliersDB.GetSuppliers()
ReloadListboxes();
}
private void btnUpdate_Click(object sender, EventArgs e)
{
//check if the information is valid and present
if (Validator.IsPresent(txtSupplierId) && Validator.IsPresent(txtSupplierName) &&
Validator.NonNegativeInt32(txtSupplierId))
{
string supName = txtSupplierName.Text;
int supplierId = Convert.ToInt32(txtSupplierId.Text);
bool exists = false;
bool attempt = false;
List <Suppliers> suppliers = SuppliersDB.GetSuppliers();
//for each supplier in suppliers list, check if the new name is present
foreach (Suppliers supplier in suppliers)
{
if (supplier.SupName == supName)
{
exists = true;
}
}
if (!exists)
{
//if there is no name by the name
try
{
//replace the information
attempt = SuppliersDB.UpdateSupplier(supplierId, supName, oldsupplierid, oldsupName);
}
catch (SqlException ex)
{
MessageBox.Show("Error modifying supplier\n" + ex);
}
if (attempt)
{
MessageBox.Show("Successfully modified");
this.Close();
}
}
else
{
MessageBox.Show("Supplier name is already in the database");
}
}
}
private void btnAdd_Click(object sender, EventArgs e)
{
if (Validator.IsPresent(txtSupplierId) && Validator.IsPresent(txtSupplierName) &&
Validator.NonNegativeInt32(txtSupplierId))
{
string supName = txtSupplierName.Text;
int supplierId = Convert.ToInt32(txtSupplierId.Text);
bool exists = false;
bool attempt = false;
List <Suppliers> suppliers = SuppliersDB.GetSuppliers();
foreach (Suppliers supplier in suppliers)
{
if (supplier.SupName == supName)
{
exists = true;
}
}
if (!exists)
{
try
{
attempt = SuppliersDB.InsertSupplier(supplierId, supName);
}
catch
{
MessageBox.Show("Provided Supplier ID already exists, please enter a different one");
txtSupplierId.Focus();
}
if (attempt)
{
MessageBox.Show("Successfully added " + supName + " to the database");
this.Close();
}
}
}
}
