代码：
SqlParameter[] commandParameters = new SqlParameter[]{new SqlParameter("@CultID",filters.ParentID)};var result = db.Database.SqlQuery<FM_PlantSolutions>(@"select s.* ,u.UserName as PrincipalName,isnull(ue.UserName,'无') as ExaminerName ,i.BaseName AS InputsTypeNamefrom [v_PlantSolutionsRelation] as rinner join dbo.FM_Solutions as s on r.SoluID = s.SoluIDinner join dbo.U_UserInfo as u on s.Principal= u.UserIDleft join dbo.U_UserInfo as ue on s.Examiner = ue.UserID inner join dbo.B_BaseInfo as i on s.InputsType=i.BaseValuewhere r.CultID = CultID and i.ClassID = 21 ", commandParameters);var q= result.OrderBy(t => t.SoluName).Skip((filters.page - 1) * filters.rows).Take(filters.rows);return new {rows = q.ToList(),records = result.Count(),page = filters.page,pagesize = filters.rows};
查询报表的时候需要通过两次查询取出数据。
第一次，用count(*)查出总数；第二次，用rownumber分页取出想要的页内容；
然而，无论怎么修改，总是报错：另一个 SqlParameterCollection 中已包含 SqlParameter。
参照了网友的做法：https://www.cnblogs.com/jhli/p/6898650.html
但是并没有解决问题，分析报错的原理，大概是这段代码执行了两次，传入了两次同样的参数，所以索性将.ToList()往前放，直接将所有数据加载到内存中，再进行分页，问题解决了，修改后的代码
SqlParameter[] commandParameters = new SqlParameter[]{new SqlParameter("@CultID",filters.ParentID)};var result = db.Database.SqlQuery<FM_PlantSolutions>(@"select s.* ,u.UserName as PrincipalName,isnull(ue.UserName,'无') as ExaminerName ,i.BaseName AS InputsTypeNamefrom [v_PlantSolutionsRelation] as rinner join dbo.FM_Solutions as s on r.SoluID = s.SoluIDinner join dbo.U_UserInfo as u on s.Principal= u.UserIDleft join dbo.U_UserInfo as ue on s.Examiner = ue.UserID inner join dbo.B_BaseInfo as i on s.InputsType=i.BaseValuewhere r.CultID = CultID and i.ClassID = 21 ", commandParameters).ToList();var q= result.OrderBy(t => t.SoluName).Skip((filters.page - 1) * filters.rows).Take(filters.rows);return new {rows = q,records = result.Count(),page = filters.page,pagesize = filters.rows};}
)
