private void buttonSignupin_Click(object sender, EventArgs e) { if ((textBoxPw.Text != textBoxCf.Text)) { labelPw.Text = "The value is different from the confirm"; labelCf.Text = "The value is different from the password"; textBoxPw.Text = null; textBoxCf.Text = null; } else if (textBoxId.Text == "") { labelId.Text = "Please enter your username"; } else if (textBoxPw.Text == "") { labelPw.Text = "Please enter your password"; } else if (textBoxCf.Text == "") { labelPw.Text = "Please enter your password"; } else { try { sqlconn = new SqlConnection(constr); sqlconn.Open(); DataSet ds = new DataSet(); using (SqlConnection conn = new SqlConnection(constr)) { conn.Open(); string sql = "INSERT INTO customer VALUES ('" + textBoxId.Text + "', '" + textBoxPw.Text + "')"; SqlDataAdapter adapter = new SqlDataAdapter(sql, conn); adapter.Fill(ds, "enroll"); } MessageBox.Show("등록 성공"); } catch (Exception ex) { MessageBox.Show(ex.Message.ToString()); } this.Visible = false; FormLogin showFormLogin = new FormLogin(); showFormLogin.showDialog(); } }