string sql = "select * from IntegralInfo where convert(nvarchar,getdate(),23)='{0}' and status=1 and userinfoid='{1}'";

sql = string.Format(sql, DateTime.Now.ToString("yyyy-MM-dd"), uid);

var IntegralInfoObj = db.Database.SqlQuery<IntegralInfo>(sql).FirstOrDefault();

 var IntegralInfoObj = db.Database.SqlQuery<IntegralInfo>("select * from IntegralInfo where convert(nvarchar,getdate(),23)=@time and status=1 and userinfoid=@uid", new SqlParameter("@time", DateTime.Now.ToString("yyyy-MM-dd")), new SqlParameter("@uid", uid)).FirstOrDefault();