private void btnSubmit_Click(object sender, EventArgs e)
        {
            localhost.Service1 ser = new localhost.Service1();
            bool isValidUpload;
            bool isValidUploadSpecified;
            bool isValidTeacherResult;
            bool isValidTeacherResultSpecified;

            ser.isValidTeacher(txtTeacherName.Text, out isValidTeacherResult, out isValidTeacherResultSpecified);
            if (isValidTeacherResult)
            {
                ser.UploadDMC(txtStudentName.Text, txtTeacherName.Text, cmbGrade.Text, label3.Text, out isValidUpload, out isValidUploadSpecified);
                if (isValidUpload)
                {
                    MessageBox.Show("Grade has been uploaded");
                }
                else
                {
                    MessageBox.Show("Invalid Data");
                }
            }
            else
            {
                MessageBox.Show("Invalid Teacher Name");
            }
        }