private void btnAdd_Click(object sender, EventArgs e)
{
string user = txtUser.Text;
string pass = txtPass.Text;
string name = txtName.Text;
string power = cbPower.Text;
string sex = cbSex.Text;
string add = txtAdd.Text;
string phone = txtPhone.Text;
DateTime birthday = DateTime.Parse(dtpBirthday.Text);
string cmt = rtbCmt.Text;
DataProcess dt = new DataProcess();
dgvStaff.DataSource = dt.AddStaff(user, pass, name, power, sex, add, phone, birthday, cmt);
}
