/// <summary>
/// 执行关注，取消关注或不执行操作的逻辑判断
/// 执行操作返回1，无操作返回0
/// </summary>
/// <param name="concernName"></param>
/// <param name="beConcernName"></param>
/// <param name="Num"></param>
/// <returns></returns>
public int LgGuanZhuUser(string concernName, string beConcernName, string Num)
{
User_dal user_dal = new User_dal();
int concernNameId = Convert.ToInt32(user_dal.GetUserId(concernName));
int beConcernNameId = Convert.ToInt32(user_dal.GetUserId(beConcernName));
object exist = user_dal.select_ConIdAndBeConId(concernNameId, beConcernNameId); //查询记录是否存在，null或concernNameId
if (exist == null && Num == "1") //无关注记录，只可插入不可删除
{
return(user_dal.insert_IdTotb_Attention(concernNameId, beConcernNameId));
}
else if (exist != null && Num == "0")//有关注记录，只可删除不可插入
{
return(user_dal.delete_IdFromtb_Attention(concernNameId, beConcernNameId));
}
else
{
return(0);
}
}