public DataTable SearchTeacherIf(string IDTeacher)
{
try
{
Teacher teacher = new Teacher();
teacher.MaGV = int.Parse(IDTeacher);
return(teacherDAO.SearchTeacherIf(teacher));
}
catch (Exception ex)
{
MessageBox.Show("không nhập kí tự chuỗi");
return(null);
}
}
