private void btnSave_Click(object sender, EventArgs e) { pass = ""; SetPass(); nhanVien nv = db.nhanViens.Where(s => s.maNV.Equals(txtMaNV.Text)).FirstOrDefault(); nhanVien nv2 = db.nhanViens.Where(s => s.tendn.Equals(txtTenDN.Text)).FirstOrDefault(); switch (choose) { case 1: { if (txtTenDN.Text.Equals(null)) { MessageBox.Show("Chưa điền tên đăng nhập"); } else { if (nv2 == null) { SendMail(nv.tenNV, nv.email); db.ACC_Add(txtMaNV.Text, txtTenDN.Text, MaHoaMD5(pass)); Uc_TaiKhoan_Load(sender, e); } } break; } case 2: { db.ACC_Del(txtMaNV.Text); Uc_TaiKhoan_Load(sender, e); break; } case 3: { SendMail(nv.tenNV, nv.email); db.ACC_Up(txtMaNV.Text, MaHoaMD5(pass)); Uc_TaiKhoan_Load(sender, e); break; } case 4: { if (rdbMaNV.Checked == true) { dgvTaiKhoan.DataSource = db.ACC_FindID(txtMaNV.Text); } else if (rdbTenDN.Checked == true) { dgvTaiKhoan.DataSource = db.ACC_FindTenDN(txtTenDN.Text); } break; } } }