private void iAddBtn_Click(object sender, EventArgs e)
        {
            //validate input
            //add instructor details

            if (!Validation.isTextBoxValid(errorProvider1, IuserIdTxtBox, iPasswordTxtBox, iFirstNameTxtBox, iLastNameTxtBox, iEmailTxtBox, iPhoneTxtBox))
            {
                return;
            }

            //add instructor

            adminConnect = new AdminConnect();
            InstructorObject instructor = new InstructorObject();

            instructor.UserId    = IuserIdTxtBox.Text;
            instructor.Password  = iPasswordTxtBox.Text;
            instructor.FirstName = iFirstNameTxtBox.Text;
            instructor.LastName  = iLastNameTxtBox.Text;
            instructor.Phone     = iPhoneTxtBox.Text;
            instructor.Email     = iEmailTxtBox.Text;

            if (adminConnect.AddUser(instructor) <= 0)
            {
                //show error
                MessageBox.Show("Instructor not added", "Add error", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1, MessageBoxOptions.DefaultDesktopOnly);
            }
            else
            {
                //display success message
                MessageBox.Show("Instructor added successfully", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1, MessageBoxOptions.DefaultDesktopOnly);
            }
        }
        private void sAddButton_Click(object sender, EventArgs e)
        {
            if (!Validation.isTextBoxValid(errorProvider1, sUserIdTextBox, sPassowrdtextBox, sFirstNametextBox, sLastNametextBox, sEmailTextBox, sPhoneTextBox))
            {
                return;
            }

            //add student

            adminConnect = new AdminConnect();
            StudentObject student = new StudentObject();

            student.UserId    = sUserIdTextBox.Text;
            student.Password  = sPassowrdtextBox.Text;
            student.FirstName = sFirstNametextBox.Text;
            student.LastName  = sLastNametextBox.Text;
            student.Phone     = sPhoneTextBox.Text;
            student.Email     = sEmailTextBox.Text;

            if (adminConnect.AddUser(student) <= 0)
            {
                //show error
                MessageBox.Show("Instructor not added", "Add error", MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1, MessageBoxOptions.DefaultDesktopOnly);
            }
            else
            {
                //display success message
                MessageBox.Show("Instructor added successfully", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1, MessageBoxOptions.DefaultDesktopOnly);
            }
        }