private void Start_btn_Click(object sender, EventArgs e) { if (FLSM_chck.Checked) { FLSM_Mass.Show(); FLSM_Mass.Enabled = true; VLSM_Mass.Hide(); } else if (VLSM_chck.Checked) { VLSM_Mass.Show(); VLSM_Mass.Enabled = true; FLSM_Mass.Hide(); } else { return; } IP_txt.Enabled = true; Calc_btn.Enabled = true; Req_txt.Enabled = true; }
private void VLSM_Mass_Leave(object sender, EventArgs e) { if (string.IsNullOrEmpty(VLSM_Mass.Text) == true) { VLSM_Mass.Focus(); errorProvider2.SetError(this.VLSM_Mass, "Please enter Subnet mask!"); } else { errorProvider2.Clear(); } }