ExecuteStoreQuery用于自定义列 [英] ExecuteStoreQuery for custom columns

问题描述

我正在尝试运行自定义查询，并且我正在使用Entity Framework，所以我尝试过

I am trying to run custom query and I am using Entity framework, I tried this

string query = @"SELECT dm.DistrictName,sm.SchoolName,u.UserId,u.FirstName,u.LastName, sa.StudentId, sa.ReadingLevel
                 FROM  studentassessment sa
                 INNER JOIN assessmentmaster am ON sa.AssessmentId = am.AssessmentId
                 INNER JOIN studentclass sc ON sa.StudentId = sc.StudentId
                 INNER JOIN USER u ON sc.TeacherId = u.UserId
                 INNER JOIN schoolmaster sm ON u.SchoolCode = sm.SchoolCode
                 INNER JOIN  districtmaster dm ON sm.DistrictId = dm.DistrictId
                 WHERE u.RoleId = 5 && sa.GradeId = " + objParam.Grade + " && sa.AssessmentPeriodId = " + x.AssessmentPeriodId + " && dm.DistrictId = " + districtCode + " && am.DRAType = '" + objParam.LanguageType + "' && am.AssessmentTypeId = 1";



var dt = db.ExecuteStoreQuery<List<object>>(query).FirstOrDefault();

但是没有成功.

在没有映射到任何对象类型的结构中，有什么方法可以从 ExecuteStoreQuery 获取结果吗?

Is there any way to get results from ExecuteStoreQuery in the structure not mapped to any object type?

推荐答案

否.EF的 ExecuteStoreQuery 要求数据类型(类)的属性与您的查询结果集中的列具有相同的名称.如果要执行查询而不为其结果集创建特殊类型，则必须直接使用ADO.NET和 SqlDataReader .

No. EF's ExecuteStoreQuery requires data type (class) with properties with same names as columns in yours query result set. If you want to execute query without creating a special type for its result set you have to use ADO.NET and SqlDataReader directly.

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