public void SaveInventoryItem()
{
string productID = ProductIDTextBox.Text;
string productDesc = ProductDescTextBox.Text;
string purchasePrice = PriceTextBox.Text;
string primeCategory = GetSelectedPrimeCategory();
string secondaryCategory = GetSelectedSecCategory();
string productStatus = "Available";
string serialNumber = SerialNumberTextBox.Text;
string saleDate = "1/1/1990";
DataManager dataManager = new DataManager(connectionString);
dataManager.InsertInventoryItem(productID,productDesc,purchasePrice,primeCategory,
secondaryCategory,productStatus,serialNumber,saleDate);
}