/// <summary>
/// dalete contract from the data base
/// </summary>
/// <param name="ContractNumber">contract number to remove</param>
public void removeContract(int ContractNumber)
{
XElement result = (from contract in DataSourceXml.ContractRoot.Elements()
where Convert.ToInt32(contract.Element("ContractNumber").Value) == ContractNumber
select contract).FirstOrDefault();
if (result != null)
{
result.Remove();
DataSourceXml.saveContracts();
}
else
{
throw new DALException("ERROR: There is no contract with this number to remove");
}
}
/// <summary>
/// delete nanny from the collection
/// </summary>
/// <param name="id">id number of the nanny</param>
public void removeNanny(int id)
{
XElement result = (from nanny in DataSourceXml.NannyRoot.Elements()
where Convert.ToInt32(nanny.Element("Id").Value) == id
select nanny).FirstOrDefault();
if (result != null)
{
result.Remove();
DataSourceXml.saveContracts();
}
else
{
throw new DALException("ERROR: There is no nanny with this id to remove");
}
}
//--------------menage contracts----------------//
/// <summary>
/// adds a contract to the data base
/// Exception:
/// there are a contract for this child
/// in the data base no are a mother or nanny with approprite ID
/// </summary>
/// <param name="con">object of contract to add</param>
public void addContract(Contract con)
{
if (DataSourceXml.ContractRoot.Elements().Any(x => (Convert.ToInt32(x.Element("ChildId").Value) == con.ChildId)))
{
throw new DALException("There is the same contract with this child id already");
}
if (DataSourceXml.NannyRoot.Elements().All(x => (Convert.ToInt32(x.Element("Id").Value) != con.NannyId)))
{
throw new DALException("ERROR: There is no are a nanny with this id");
}
if (DataSourceXml.MotherRoot.Elements().All(x => (Convert.ToInt32(x.Element("Id").Value) != con.MotherId)))
{
throw new DALException("ERROR: There is no are a Mother with this id");
}
//con.ContractNumber = ++Range;
DataSourceXml.ContractRoot.Add(con.Clone().ContantToXML());
DataSourceXml.saveContracts();
}