Entity Framework执行原生SQL语句

ExecuteSqlCommand为执行命令的接口， SqlQuery 为返回查询结果

1、Database.ExecuteSqlCommand 方法 (String, Object[])

2、Database.SqlQuery 方法 (Type, String, Object[])

 

实例：

 

 1  var stu = dbContext.Student.FirstOrDefault<Student>(t => t.Id == 1);
 2 
 3                 var list2 = from a in dbContext.Student
 4                             join b in dbContext.Course
 5                             on a.Id equals b.StudentId
 6                             where a.Id == 1
 7                             select new { a.Name, a.Sex, a.Aage, b.CourseName };
 8                 gridView.DataSource = list2.ToList();
 9                 gridView.DataBind();
10 
11                 var cnt = dbContext.Database.ExecuteSqlCommand("update student  set name=@name where id = @id", new SqlParameter[] {
12                 new SqlParameter("@id", 10),
13                 new SqlParameter("@name","学生姓名") });//执行更新操作
14 
15                 var res = dbContext.Database.SqlQuery<Student2>("select Id,name from student where id=@id", new SqlParameter[] {
16                     new SqlParameter("@id",10) });
17                 //返回数据
18                 //var res = dbContext.Database.SqlQuery<Student2>("select Id,name from student where id=@id", new SqlParameter("@id", 10));
19                 gridView.DataSource = res.ToList();
20                 gridView.DataBind();

 

ps：Student2不一定为映射的实体对象，可以为自定义其他对象，但实体对象的属性数量必须多余或等于SqlQuery查询语句中查询返回的列数量。

参考：

https://msdn.microsoft.com/zh-cn/library/system.data.entity.database.aspx