private void button3_Click(object sender, EventArgs e) { Main_menu m = new Main_menu(); this.Hide(); m.Show(); }
private void button1_Click(object sender, EventArgs e) { //Sqlconnection for user login SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\lenovo\Desktop\Ravi_code\Teachers\user_Database.mdf;Integrated Security=True;Connect Timeout=30"); string Query = "SELECT * From Login WHERE username= '******' AND password= '******'"; SqlDataAdapter sda = new SqlDataAdapter(Query, con); DataTable dt = new DataTable(); sda.Fill(dt); if (dt.Rows.Count == 1) { Main_menu m = new Main_menu(); this.Hide(); m.Show(); } else { MessageBox.Show("Username or Password is Incorect"); } con.Close(); }