protected DataExistingEventArgs OnExisting(string name, ICondition condition, bool cancel)
{
var args = new DataExistingEventArgs(name, condition, cancel);
this.OnExisting(args);
return(args);
}
protected DataExistingEventArgs OnExisting(ICondition condition, bool cancel = false)
{
var args = new DataExistingEventArgs(this.Name, condition, cancel);
this.OnExisting(args);
return(args);
}
protected virtual void OnExisting(DataExistingEventArgs args)
{
var e = this.Existing;
if (e != null)
{
e(this, args);
}
}
protected virtual bool OnExisting(DataExistenceContext context)
{
var e = this.Existing;
if (e == null)
{
return(false);
}
var args = new DataExistingEventArgs(context);
e(this, args);
return(args.Cancel);
}