public void UpdateReview(BALReview obj)
    {
        query = "update Review set ReviewContent='" + obj.ReviewContent + "',UserId=" + obj.UserId + ",BusinessId=" + obj.BusinessId + ",ReviewDate='" + obj.ReviewDate + "',ReviewStatus='" + obj.ReviewStatus + "',Rating=" + obj.Rating + "where ReviewId=" + obj.ReviewId;
        SqlCommand cmd = new SqlCommand(query,con);

        con.Open();
        cmd.ExecuteNonQuery();
        con.Close();
    }
    public void InsertReview(BALReview obj)
    {
        query = "insert into Review(ReviewContent,UserId,BusinessId,ReviewDate,ReviewStatus,Rating) values ('" + obj.ReviewContent + "'," + obj.UserId + "," + obj.BusinessId + ",'" + obj.ReviewDate + "','" + obj.ReviewStatus + "'," + obj.Rating + ")";
        SqlCommand cmd = new SqlCommand(query, con);

        con.Open();
        cmd.ExecuteNonQuery();
        con.Close();
    }
    public DataSet SelectReviewByBusinessID(BALReview obj)
    {
        query = "select * from Review r inner join [User] u on r.UserId=u.UserId inner join Business b on r.BusinessId=b.BusinessId inner join Login l on u.LoginId=l.LoginId where r.BusinessId="+obj.BusinessId;
        DataSet ds = new DataSet();

        SqlDataAdapter adp = new SqlDataAdapter(query, con);
        adp.Fill(ds);
        return ds;
    }
    public void DeleteReview(BALReview obj)
    {
        query = "delete from Review where ReviewId=" + obj.ReviewId;
        SqlCommand cmd = new SqlCommand(query,con);

        con.Open();
        cmd.ExecuteNonQuery();
        con.Close();
    }