public static TeacherService GetInstance()
{
if (TeacherServiceObj == null)
{
TeacherServiceObj = new TeacherService();
}
return(TeacherServiceObj);
}
//登陆
public bool TeacherLogIn(string loginId, string loginPwd, out Teacher validTeacher)
{
Teacher teacher = new TeacherService().GetTeacherById(loginId);
if (teacher == null)
{
validTeacher = null; //用户名不存在
return(false);
}
if (teacher.TeacherPwd == loginPwd)
{
validTeacher = teacher;
return(true);
}
else
{
validTeacher = null;//密码错误
return(false);
}
}
