public BookPurchaseInfo BookPurchaseInfo(string totalBudget, Dictionary<string, string> purchaseBook)
{
BookPurchaseInfo thisPurchaseInfo = new BookPurchaseInfo();
if (String.IsNullOrWhiteSpace(totalBudget))
{
throw new NullReferenceException("Input field(s) is empty.");
}
else
{
try
{
thisPurchaseInfo.budget = float.Parse(totalBudget);
thisPurchaseInfo.items = purchaseBook.ToDictionary(
x => int.Parse(x.Key),
x => int.Parse(x.Value)
);
}
catch (Exception Ex)
{
throw new Exception(Ex.Message);
}
}
return thisPurchaseInfo;
}
public BookPurchaseResponse PurchaseBooks(BookPurchaseInfo purchaseInfo)
{
float totalCost = 0;
float thisBudget = purchaseInfo.budget;
Dictionary<int, int> items = purchaseInfo.items;
foreach (KeyValuePair<int, int> item in items)
{
int thisID = item.Key;
int thisQty = item.Value;
float getCost = getBookCost(thisID);
int getQty = getBookQty(thisID);
if (getQty < thisQty)
{
thisResponse.result = false;
thisResponse.response = "Not enough stock(s) available. You wanted:" + thisQty + "; stock(s) available: " + getQty;
return thisResponse;
}
totalCost += (getCost * thisQty);
}
if (totalCost <= thisBudget)
{
thisResponse.result = true;
try
{
float balance = thisBudget - totalCost;
thisResponse.response = String.Format("Your change is: ${0:0.00}", balance);
}
catch (Exception Ex)
{
throw new FaultException<Exception>(new Exception(Ex.Message));
}
}
else
{
thisResponse.result = false;
thisResponse.response = "Not enough money. You are $" + String.Format("{0:0.00}", totalCost - thisBudget) + " short.";
}
return thisResponse;
}
protected void Button5_Click(object sender, EventArgs e)
{
ServiceReference1.ServiceClient sc1 = new ServiceReference1.ServiceClient();
BookPurchaseInfo info = new BookPurchaseInfo();
BookPurchaseResponse responce = new BookPurchaseResponse();
Boolean valid = true;
try
{
float budget = float.Parse(TextBox9.Text);
if (budget <= 0)
{
TextBox13.Text = "budget must be positive";
return;
}
info.budget = budget;
info.items = new Dictionary <int, int>();
//info.items.Add(int.Parse(TextBox10.Text), int.Parse(TextBox11.Text));
for (int j = 0; j < count; j++)
{
TextBox tb1 = (TextBox)Panel1.FindControl("book" + j);
TextBox tb2 = (TextBox)Panel1.FindControl("amount" + j);
try
{
int key = int.Parse(tb1.Text);
int value = int.Parse(tb2.Text);
info.items.Add(key, value);
}
catch
{
TextBox13.Text = "Book number or amount is invalid";
}
}
responce.response = sc1.PurchaseBooks(info.budget, info.items, out responce.result);
TextBox12.Text = responce.response;
}
catch
{
TextBox13.Text = "budget is invalid";
}
}
public BookPurchaseResponse PurchaseBooks(BookPurchaseInfo info)
{
BookPurchaseResponse responce = new BookPurchaseResponse();
List <Book> books = GetAllBooks();
float budget = info.budget;
Dictionary <int, int> items = info.items;
float totalPrice = 0.0f;
foreach (var item in items)
{
int key = item.Key;
int value = item.Value;
if (key > books.Count || key <= 0)
{
throw new Exception("Input is invalid");
}
if (value > books[key - 1].stock)
{
responce.result = false;
responce.response = "No enough stocks";
return(responce);
}
totalPrice = totalPrice + value * books[key - 1].price;
}
if (totalPrice > info.budget)
{
responce.response = "No enough money";
responce.result = false;
return(responce);
}
responce.response = Convert.ToString(info.budget - totalPrice);
responce.result = true;
return(responce);
}