public static bool UpdateStudentInfo(Student s)
{
try
{
////查询出来一个student
//Student stu = StudentServer.SelectStudentByID(s.StuID);
//ExamDBEntities db = new ExamDBEntities();
//db.Entry(stu).State = EntityState.Modified;
////逐个更新
//stu.StuName = s.StuName;
//stu.StuLoginName = s.StuLoginName;
//stu.StuSex = s.StuSex;
//stu.StuGrade = s.StuGrade;
//stu.StuEmail = s.StuEmail;
//stu.StuLoginPwd = s.StuLoginPwd;
//stu.StuPhone = s.StuPhone;
//查询出来一个student
Student stu = StudentServer.SelectStudentByID(s.StuID);
ExamDBEntities db = new ExamDBEntities();
//这也可以实现对象的快速修改，推荐用这个方法
db.Entry(s).State = EntityState.Modified; //直接将传入的对象，设置修改装填
db.SaveChanges();
return(true);
}
catch
{
return(false);
}
}
public static bool DeleteStudentByID(int id)
{
try
{
//获取要删除的学生信息
Student s = StudentServer.SelectStudentByID(id);
ExamDBEntities db = new ExamDBEntities();
//将要删除的学生对象状态，修改为删除。
db.Entry(s).State = EntityState.Deleted;
db.Students.Remove(s);//Remove删除
db.SaveChanges();
return(true);
}
catch
{
return(false);
}
}
public static Student GetStudentById(int id)
{
return(StudentServer.SelectStudentByID(id));
}