public SupplierManagementUserCtrl(string staffID)
{
InitializeComponent();
this.staffID = staffID;
List <Supplier> allSauppliers = sda.getAllSuppliers(conn);
AutoCompleteStringCollection supplierIdCollection = new AutoCompleteStringCollection();
foreach (Supplier supplier in allSauppliers)
{
supplierIdCollection.Add(supplier.getSupplierID());
}
searchSupplierIdTextBox.AutoCompleteCustomSource = supplierIdCollection;
}