/// <summary>
/// ��ȡIP����ɾ����¼
/// </summary>
/// <param name="iPCID">��ȡIP���ñ��</param>
/// <param name="where">��ʱ����������ͳһ��ǰ��Ҫ�����ӷ���and��or�ȵȣ�</param>
/// <param name="delCache">ɾ���ɹ��������CACHE key��֧������</param>
/// <param name="dbkey">�������ݿ����ӳ��е�����key��Ϊ��ʱʹ��ConnString����</param>
/// <returns>ɾ���Ƿ�ɹ�</returns>
public static bool DeleteByID(Int64? iPCID, string dbkey = "", Where where = null, string[] delCache = null)
{
if (iPCID.IsNull()) return false;
int value = new SQL().Database(dbkey).Delete(IpSetting._)
.Where(new Where()
.AndP(IpSetting._IPCID, iPCID, Operator.Equal, true)
).Where(where).ToExec();
if (value != 1) return false;
if (delCache.IsNull()) return true;
Cache2.Remove("TH.Mailer.IpSettingCache_", delCache);
return true;
}