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"); } }