protected void Sell(int amount, int companyId)
{
int userShares;
Guid UserId;
User user = new User();
Comapny company = new Comapny();
UserId = new Guid(MySession.Current.UserId);
try
{
user = UserDB.GetUser(UserId);
company = CompanyDB.GetCompanyShares(companyId);
userShares = SharesDB.GetUserShares(UserId, companyId);
}
catch (SqlException sqlEx)
{
lblErrorMessage.Text = "A database error has occurred.<br /><br />" +
sqlEx.Message;
return;
}
if (userShares - amount >= 0)
{
user.cash += company.sharePrice * amount;
company.shares += amount;
userShares -= amount;
try
{
SharesDB.UpdateCash(UserId, user.cash);
if (userShares == 0)
{
SharesDB.DeleteUserShares(UserId, companyId);
}
else
{
SharesDB.UpdateUserShares(UserId, companyId, userShares);
}
CompanyDB.UpdateCompanyShares(companyId, company.shares);
dsUserStocks.SelectParameters["UserId"].DefaultValue = MySession.Current.UserId;
}
catch (SqlException sqlEx)
{
lblErrorMessage.Text = "A database error has occurred.<br /><br />" +
sqlEx.Message;
return;
}
try
{
UserHistoryDB.InsertHistory(UserId, companyId, amount, 's', 0, company.sharePrice);
}
catch (SqlException sqlEx)
{
lblErrorMessage.Text = "A database error has occurred.<br /><br />" +
sqlEx.Message;
// lblConfirmation.Text = "";
return;
}
gvwUserStocks.DataBind();
lblErrorMessage.Text = "";
lblConfirmation.Text = "Share sold successfully";
}
else
{
lblConfirmation.Text = "";
lblErrorMessage.Text = "You can not sell that many shares";
}
}
protected void Buy(int amount, int companyId)
{
int userShares;
Guid UserId;
User user = new User();
Comapny company = new Comapny();
UserId = new Guid(MySession.Current.UserId);
try
{
user = UserDB.GetUser(UserId);
company = CompanyDB.GetCompanyShares(companyId);
userShares = SharesDB.GetUserShares(UserId, companyId);
}
catch (SqlException sqlEx)
{
lblErrorMessage.Text = "A database error has occurred.<br /><br />" +
sqlEx.Message;
lblConfirmation.Text = "The stock could not be purchased";
return;
}
//if the user has enough money
if (user.cash - company.sharePrice * amount >= 0)
{
//if the company has enough shares
if (company.shares - amount >= 0)
{
user.cash -= company.sharePrice * amount;
company.shares -= amount;
try
{
if (userShares > 0)
{
SharesDB.UpdateUserShares(UserId, companyId, userShares + amount);
}
else
{
SharesDB.InsertUserShares(UserId, companyId, amount, userShares + amount);
}
SharesDB.UpdateCash(UserId, user.cash);
CompanyDB.UpdateCompanyShares(companyId, company.shares);
}
catch (SqlException sqlEx)
{
lblErrorMessage.Text = "A database error has occurred.<br /><br />" +
sqlEx.Message;
// lblConfirmation.Text = "";
return;
}
try
{
UserHistoryDB.InsertHistory(UserId, companyId, amount, 'b', company.sharePrice, 0);
}
catch (SqlException sqlEx)
{
lblErrorMessage.Text = "A database error has occurred.<br /><br />" +
sqlEx.Message;
// lblConfirmation.Text = "";
return;
}
gwBuyStocks.DataBind();
lblErrorMessage.Text = "";
lblConfirmation.Text = "Share bought successfully";
}
//else inform the user of the lack of available shares
else
{
lblConfirmation.Text = "";
lblErrorMessage.Text = "Sorry no shares of that company are currently available for purchase";
}
}
//else call the user poor
else
{
lblErrorMessage.Text = "You are too poor";
lblConfirmation.Text = "";
}
}
