代码实现SQL Server动态行转列，不用存储过程

分两步查询，第一步查询出动态列，第二步使用PIVOT函数。

代码：

List<DataTable> dataTableList = new List<DataTable>();

#region 指标
DataTable dtEvaItemTitle = db.RunTable<Edu_EvaluationRecord>(string.Format(@"
    select distinct eva.id, eva.name
    from Edu_EvaluationRecord r
    left join Edu_QnVolume v on r.queryid=v.id
    left join Sys_EvaluationItem eva on r.evaitemid=eva.id
    where v.id={0}
    order by eva.id", volumeEva.Id));
List<string> evaItemTitleList = new List<string>();
for (int i = 0; i < dtEvaItemTitle.Rows.Count; i++)
{
    evaItemTitleList.Add(string.Format("[{0}]", dtEvaItemTitle.Rows[i]["name"].ToString()));
}
string evaItemTitles = String.Join(",", evaItemTitleList.ToArray());

string sql = string.Format(@"
    select * from
    (select stu.name as 姓名,stu.StuNum as 学号,stu.ExamNum as 考号,
    case when stu.Sex=‘1‘ then ‘男‘ else ‘女‘ end as 姓别,
    case when stu.Brothers=‘1‘ then ‘否‘ else ‘是‘ end as 是否独生,
    stu.EduF as 父亲文化,stu.EduM as 母亲文化,
    r.score as 分数,eva.Name as 题目
    from Edu_EvaluationRecord r
    left join Edu_Student stu on r.userid=stu.id
    left join Sys_User u on stu.userid=u.id
    left join Edu_QnVolume v on r.queryid=v.id
    left join Sys_EvaluationItem eva on r.evaitemid=eva.id
    where v.id={0}) p
    pivot (sum(分数) for 题目 in ({1}))
    as pvt", volumeEva.Id, evaItemTitles);
DataTable dt = db.RunTable<Edu_EvaluationRecord>(sql);
dt.TableName = volumeEva.Name;
dataTableList.Add(dt);
#endregion

#region 普通
DataTable dtItemTitle = db.RunTable<Edu_EvaluationRecord>(string.Format(@"
    select distinct s.id, s.title
    from edu_qnanswer ans
    left join Edu_QnSubject s on s.id=ans.subjectid
    left join Edu_QnVolume v on s.volumeid=v.id
    where v.id={0}
    order by s.id", volumeGeneral.Id));
List<string> itemTitleList = new List<string>();
for (int i = 0; i < dtItemTitle.Rows.Count; i++)
{
    itemTitleList.Add(string.Format("[{0}]", dtItemTitle.Rows[i]["title"].ToString()));
}
string itemTitles = String.Join(",", itemTitleList.ToArray());

sql = string.Format(@"
    select * from
    (select stu.name as 姓名,stu.StuNum as 学号,stu.ExamNum as 考号,
    case when stu.Sex=‘1‘ then ‘男‘ else ‘女‘ end as 姓别,
    case when stu.Brothers=‘1‘ then ‘否‘ else ‘是‘ end as 是否独生,
    stu.EduF as 父亲文化,stu.EduM as 母亲文化,
    ans.Answercontent as 选项,s.Title as 题目
    from edu_qnanswer ans
    left join Sys_User u on ans.answerid=u.id
    left join Edu_Student stu on stu.userid=u.id
    left join Edu_QnSubject s on s.id=ans.subjectid
    left join Edu_QnVolume v on s.volumeid=v.id
    where v.id={0}) p
    pivot (max(选项) for 题目 in ({1}))
    as pvt", volumeGeneral.Id, itemTitles);
dt = db.RunTable<Edu_EvaluationRecord>(sql);
dt.TableName = volumeGeneral.Name;
dataTableList.Add(dt);
#endregion