/// <summary>
/// 判断指定主键Id的记录是否存在——在IIS缓存或数据库中查找
/// </summary>
/// <param name="id">主键Id</param>
/// <returns></returns>
public bool Exist(int id)
{
if (id <= 0)
{
return(false);
}
//判断是否启用缓存
if (CommonBll.IsUseCache())
{
return(Exist(x => x.Id == id));
}
//从数据库中查找
return(LoginLog.Exists(x => x.Id == id));
}