/// <summary>
/// 更新；
/// </summary>
/// <param name="student">学生</param>
/// <returns>受影响行数</returns>
public static int Update(Student student)
{
using (var eduBase = EfHelper.GetDbContext())
{
eduBase.Entry(student).State = EntityState.Modified;
return(eduBase.SaveChanges());
}
}
/// <summary>
/// 添加；
/// </summary>
/// <param name="student">学生</param>
/// <returns>受影响行数</returns>
public static int Add(Student student)
{
using (var eduBase = EfHelper.GetDbContext())
{
eduBase.Student.Add(student);
return(eduBase.SaveChanges());
}
}
/// <summary>
/// 删除；
/// </summary>
/// <param name="studentNo">学号</param>
/// <returns>受影响行数</returns>
public static int Delete(string studentNo)
{
using (var eduBase = EfHelper.GetDbContext())
{
var student = eduBase.Student.Find(studentNo);
eduBase.Student.Remove(student);
return(eduBase.SaveChanges());
}
}
/// <summary>
/// 查找所有学院；
/// </summary>
/// <returns>学院列表</returns>
public static List <Department> FindAll()
{
using (var eduBase = EfHelper.GetDbContext())
{
var departments = from d in eduBase.Department.Include("Major.Class")
select d;
return(departments.ToList());
}
}
/// <summary>
/// 查找所有班级；
/// </summary>
/// <returns>班级列表</returns>
public static List <Class> FindAll()
{
using (var eduBase = EfHelper.GetDbContext())
{
var classes = from c in eduBase.Class
select c;
return(classes.ToList());
}
}
/// <summary>
/// 查找指定班级的学生；
/// </summary>
/// <param name="classNo">班级编号</param>
/// <returns>学生简况列表</returns>
public static List <Student> FindByClassNo(int classNo)
{
using (var eduBase = EfHelper.GetDbContext())
{
var students = from s in eduBase.Student.Include("Class")
where s.ClassNo == classNo
select s;
return(students.ToList());
}
}
/// <summary>
/// 查找学生；
/// </summary>
/// <param name="studentNo">学号</param>
/// <returns>学生</returns>
public static Student Find(string studentNo)
{
using (var eduBase = EfHelper.GetDbContext())
{
var student = from s in eduBase.Student
where s.No == studentNo
select s;
return(student.FirstOrDefault());
}
}
