/// <summary>
/// removes a contract
/// </summary>
/// <param name="contract"></param>
public void deleteContract(Contract contract)
{
XElement contractElement = (from n in DataSourceXml.Contracts.Elements()
where Convert.ToInt32(n.Element("numberOfContract").Value) == contract.numberOfContract
select n).FirstOrDefault();
if (contractElement != null)
{
contractElement.Remove();
DataSourceXml.SaveContracts();
}
else
{
throw new Exception("the contract is not in the system.\n");
}
}
/// <summary>
/// updates contract info
/// </summary>
/// <param name="contract"></param>
public void updateContract(Contract contract)
{
var temp = (from c in DataSourceXml.Contracts.Elements()
where Convert.ToInt32(c.Element("numberOfContract").Value) == contract.numberOfContract
select c).FirstOrDefault();
if (temp != null)
{
temp.ReplaceWith(contract.toXML());
DataSourceXml.SaveContracts();
}
else
{
throw new Exception("the contract is not in the system.\n");
}
}
/// <summary>
/// adds a contract to list
/// </summary>
/// <param name="contract"></param>
public void addContract(Contract contract)
{
var temp = (from c in DataSourceXml.Contracts.Elements()
where Convert.ToInt32(c.Element("numberOfContract").Value) == contract.numberOfContract
select c).FirstOrDefault();
if (temp == null)
{
DataSourceXml.Contracts.Add(contract.toXML());
DataSourceXml.SaveContracts();
}
else
{
throw new Exception("the contract is already in the system.\n");
}
}