private void txtSearch_TextChanged(object sender, TextChangedEventArgs e)
        {
            if (txtSearch.Text != "")
            {
                int id = Int32.Parse(txtSearch.Text);
                student = rep.getStudent(id);
                txtName.Text = student.StudentName;

                if (student.StudentAddress != null)
                {
                    txtDireccion1.Text = student.StudentAddress.Address1;
                    txtDireccion2.Text = student.StudentAddress.Address2;
                    txtCiudad.Text = student.StudentAddress.City;
                }
                else
                {
                    txtDireccion1.Text = "";
                    txtDireccion2.Text = "";
                    txtCiudad.Text = "";
                }
                if (student.Standard != null)
                {
                    comboStandardId.Text = student.Standard.StandardName;

                }

                dataGrid.ItemsSource = student.Course.ToList();
            }

        }

        private void txtSearch_TextChanged(object sender, TextChangedEventArgs e)
        {
            int id = Int32.Parse(txtSearch.Text);
            Student student = rep.getStudent(id);
            txtName.Text = student.StudentName;

            dataGrid.ItemsSource = student.Course.ToList();

            Student tmp = new Student();
            
        }

        private void btnGuardar_Click(object sender, RoutedEventArgs e)
        {
            Student std = new Student();

            std.StudentName = txtName.Text;
            std.StudentAddress = new StudentAddress();
            std.StudentAddress.Address1 = txtDireccion1.Text;
            std.StudentAddress.Address2 = txtDireccion2.Text;
            std.StudentAddress.State = txtEstado.Text;
            std.StudentAddress.City = txtCiudad.Text;

            if (comboStandardId.SelectedIndex != -1)
            {
                std.StandardId = standards[comboStandardId.SelectedIndex].StandardId;
            }


            int id = rep.addStudent(std);
            Console.WriteLine(id);
        }

        private void btnNuevo_Click(object sender, RoutedEventArgs e)
        {
            student = null;
            newStudentCourses = null;
            txtSearch.Text = "";
            txtName.Text = "";
            txtDireccion1.Text = "";
            txtDireccion2.Text = "";
            txtEstado.Text = "";
            txtCiudad.Text = "";

            comboStandardId.Text = "";
            comboCursos.Text = "";

            dataGrid.ItemsSource = null;


        }

        private void btnGuardar_Click(object sender, RoutedEventArgs e)
        {
            Student std = new Student();

            std.StudentName = txtName.Text;
            std.StudentAddress = new StudentAddress();
            std.StudentAddress.Address1 = txtDireccion1.Text;
            std.StudentAddress.Address2 = txtDireccion2.Text;
            std.StudentAddress.State = txtCiudad.Text;
            if (comboStandardId.SelectedIndex != -1)
            {
                std.StudentID = standards[comboStandardId.SelectedIndex].StandardId;
            }
            rep.addStudent(std);
        }

        private void btnGuardar_Click(object sender, RoutedEventArgs e)
        {
            Student std = new Student();

            std.StudentName = txtName.Text;
            std.StudentAddress = new StudentAddress();
            std.StudentAddress.Address1 = txtDireccion1.Text;
            std.StudentAddress.Address2 = txtDireccion2.Text;
            rep.addStudent(std);
        }

        private void btnGuardar_Click(object sender, RoutedEventArgs e)
        {
            Student std = new Student();



            rep.addStudent(std);
        }