protected virtual void OnContractStateChanging(ContractStateChangeEventArgs e)
{
if (ContractStateChanging == null)
{
return;
}
var invList = ContractStateChanging.GetInvocationList();
var billingHandlers = invList
.Where(d => d.Target is IBilling)
.OfType <ContractStateChangeEventHandler>();
var otherHandlers = invList.Where(d => !(d.Target is IBilling)).OfType <ContractStateChangeEventHandler>();
bool allow = e.ChangeAllowed;
foreach (var handler in otherHandlers)
{
handler(this, e);
}
e.ChangeAllowed = allow;
foreach (var handler in billingHandlers)
{
handler(this, e);
}
}
// Подписка на изменение состояния контракта
protected void BillingContractStateChanging(object sender, ContractStateChangeEventArgs e)
{
e.ChangeAllowed = _allowContractStateChange;
}
