private void AppendIP(string ip)
{
List <IpItem> lst = IPList;
lock (lst)
{
DateTime now = DateTime.Now;
IpItem nitem = new IpItem();
nitem.UpdateDate = now;
nitem.IP = ip;
lst.Add(nitem);
}
}
/// <summary>
/// 删除过期IP
/// </summary>
private int DeleteOld()
{
List <IpItem> lst = IPList;
int ret = 0;
lock (lst)
{
DateTime now = DateTime.Now;
IpItem item = null;
for (int i = lst.Count - 1; i >= 0; i--)
{
item = lst[i];
if (now.Subtract(item.UpdateDate).TotalMilliseconds > IPTimeOutMilliseconds)
{
lst.RemoveAt(i);
}
}
}
return(ret);
}