public List <ExpenseItem> LoadFromFile(string fileName)
{
List <ExpenseItem> expenseItems = new List <ExpenseItem>();
if (string.IsNullOrWhiteSpace(fileName) || !File.Exists(fileName))
{
throw new Exception("file doesn't exist.");
}
XmlTextReader reader = new XmlTextReader(fileName);
ExpenseItem item = null;
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
if (string.Equals(reader.Name, "Item", StringComparison.CurrentCultureIgnoreCase))
{
item = new ExpenseItem();
}
else if (item != null)
{
if (string.Equals(reader.Name, "ID", StringComparison.CurrentCultureIgnoreCase))
{
item.ID = int.Parse(reader.ReadElementString().Trim());
}
if (string.Equals(reader.Name, "Date", StringComparison.CurrentCultureIgnoreCase))
{
item.DateString = reader.ReadElementString().Trim();
}
if (string.Equals(reader.Name, "Amount", StringComparison.CurrentCultureIgnoreCase))
{
item.Amount = double.Parse(reader.ReadElementString().Trim());
}
if (string.Equals(reader.Name, "Tag", StringComparison.CurrentCultureIgnoreCase))
{
item.Tag = reader.ReadElementString().Trim();
}
}
}
if (reader.NodeType == XmlNodeType.EndElement && item != null)
{
expenseItems.Add(item);
item = null;
}
}
return(expenseItems);
}
public List <ExpenseItem> LoadFromFile(string fileName)
{
List <ExpenseItem> expenseItems = new List <ExpenseItem>();
if (string.IsNullOrWhiteSpace(fileName) || !File.Exists(fileName))
{
throw new Exception("file doesn't exist.");
}
string [] lines = File.ReadAllLines(fileName);
foreach (string itemLine in lines)
{
string[] words = itemLine.Trim().Split(new char[] { ',' });
if (words.Length != 4)
{
continue;
}
ExpenseItem item = new ExpenseItem();
int id;
if (int.TryParse(words[0].Trim(), out id))
{
item.ID = id;
}
else
{
continue;
}
string tmpString = words[1].Trim();
item.DateString = tmpString;
double amount;
if (double.TryParse(words[2].Trim(), out amount))
{
item.Amount = amount;
}
else
{
continue;
}
item.Tag = words[3].Trim();
expenseItems.Add(item);
}
return(expenseItems);
}
public bool AddOneItem(int expID, string dateString, double amount, string tag)
{
if (expID < 0)
{
expID = GetNextID();
}
ExpenseItem item = new ExpenseItem(expID, dateString, amount, tag);
if (!item.Validate())
{
return(false);
}
if (ContainsID(expID))
{
return(false);
}
_expenseItems.Add(item);
return(true);
}