private void button_AssignCourse_Click(object sender, EventArgs e) { if (comboBox_Teacher.Text != "Select Teacher" && comboBox_Course.Text != "Select Course") { int courseId = mysql.getCourseIdByName(comboBox_Course.Text); int teacherId = mysql.getTeacherIdByName(comboBox_Teacher.Text); mysql.AssignedCourseInsert(courseId, teacherId, comboBox_Course.Text, comboBox_Teacher.Text); label_AssinCourseMessage.ForeColor = Color.Green; label_AssinCourseMessage.Text = "Course Added Successfully"; label_AssinCourseMessage.Show(); } else { label_AssinCourseMessage.ForeColor = Color.Red; label_AssinCourseMessage.Text = "Kindly, fill all the fields."; label_AssinCourseMessage.Show(); } }