public Account GetById(int id)
{
string sql = "SELECT Id, Balance FROM Account WHERE Id=@Id";
SqlParameter parameter = new SqlParameter("@Id", id);
Account account = new Account();
using (SqlConnection conn = new SqlConnection(_connStr))
{
conn.Open();
using(SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = sql;
cmd.Parameters.Add(parameter);
SqlDataReader reader = cmd.ExecuteReader();
if (reader.Read())
{
account.Id = id;
account.Balance = Convert.ToDecimal(reader["Balance"]);
}
}
}
return account;
}
protected void Page_Init(object sender, EventArgs e)
{
this._accountService = ObjectFactory.GetInstance<AccountService>();
this.account1 = this._accountService.GetAccountById(1);
this.account2 = this._accountService.GetAccountById(2);
}
public void Transfer(Account from, Account to, decimal amount)
{
if (from.Balance > amount)
{
from.Balance -= amount;
to.Balance += amount;
this._accountRepository.Save(from);
this._accountRepository.Save(to);
this._unitOfWork.Commit();
}
else
{
throw new Exception("余额不足");
}
}
public void Remove(Account account)
{
_unitOfWork.RegisterRemoved(account, this);
}
public void Add(Account account)
{
_unitOfWork.RegisterNew(account, this);
}
public void Save(Account account)
{
_unitOfWork.RegisterAmended(account, this);
}