using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Data;
namespace WebApplication1.Models
{
public class Class1
{
StudentEntities db = new StudentEntities();
public Student GetStudent(string name)
{
return db.Students.Where(s => s.Sname == name).FirstOrDefault();
}
public Course GetCourse(string name)
{
return db.Courses.Where(s => s.Cname == name).FirstOrDefault();
}
public SC GetSC(string sno, string cno)
{
return db.SCs.Where(s => s.Sno == sno && s.Cno == cno).FirstOrDefault();
}
}
}
“object”未包含“Where”的定义,并且找不到可接受第一个“object”类型参数的扩展方法“Where”(是否缺少 using 指令或程序集引用?)