EF中使用Select new 方法中字段值替換的問題

前提需要替換查詢得到的List當中的某個字段的值，替換規則有一個mapping關系

嘗試代碼 有問題 無法獲取任何數據 

/// <summary>
        /// 獲取Treegrid的List
        /// </summary>
        /// <returns></returns>
        public JsonResult GetOrgnizationList()
        {
            IQueryable<Rights_Sys_Organization> list = db.Rights_Sys_Organization;
            return Json(new treegrid
            {
                rows = list.Select(
                s => new
                {
                    _parentId = s.ParentCode,
                    OrganizationName = s.OrganizationName,
                    EnglishName = s.EnglishName,
                    OrganizationType = s.OrganizationType,
                    States = SysDictionaryCollection.GetFieldTextByDicTypeAndValue("DicType",s.States),
                    OrganizationCode = s.OrganizationCode,
                    Order = s.Order
                }).OrderBy(c => c.Order)
            }, JsonRequestBehavior.AllowGet);
        }

正常的代碼

  /// <summary>
        /// 獲取Treegrid的List
        /// </summary>
        /// <returns></returns>
        public JsonResult GetOrgnizationList()
        {
            IQueryable<Rights_Sys_Organization> list = db.Rights_Sys_Organization;
            return Json(new treegrid
            {
                rows = list.Select(
                s => new
                {
                    _parentId = s.ParentCode,
                    OrganizationName = s.OrganizationName,
                    EnglishName = s.EnglishName,
                    OrganizationType = s.OrganizationType,
                    States = s.States,
                    OrganizationCode = s.OrganizationCode,
                    Order = s.Order
                }).OrderBy(c => c.Order)
            }, JsonRequestBehavior.AllowGet);
        }

暫時未找到解決辦法 如果有人知道怎么解決請留言 謝謝！

 

2013-08-05

解決辦法：由於dynamic類型不能修改列表中的值（貌似是這樣說的），所以解決辦法是先將list給拿出來tolist（），然后foeach改變值，改完之后再去new row；代碼如下：

public JsonResult GetOrgnizationList()
        {
            IQueryable<Rights_Sys_Organization> list = db.Rights_Sys_Organization;

            List<Rights_Sys_Organization> rlist = list.ToList();

            foreach (var item in rlist)
            {
                item.States = SysDictionaryCollection.GetFieldTextByDicTypeAndValue("OrgStates", item.States);
            }

            foreach (var item in rlist)
            {
                item.OrganizationType = SysDictionaryCollection.GetFieldTextByDicTypeAndValue("OrgType", item.OrganizationType);
            }

            dynamic rows = rlist.Select(
                s => new
                {
                    _parentId = s.ParentCode,
                    OrganizationName = s.OrganizationName,
                    EnglishName = s.EnglishName,
                    OrganizationType = s.OrganizationType,
                    States = s.States,
                    OrganizationCode = s.OrganizationCode,
                    Order = s.Order
                }).OrderBy(c => c.Order);
                           
            return Json(new treegrid
            {
                rows = rows
            }, JsonRequestBehavior.AllowGet);
        }