/// <summary> /// Checks if username and password are valid and then logs to the shop. /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnLogin_Click(object sender, EventArgs e) { using (SqlConnection sqlCon = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=C:\Users\Marius\source\repos\ProiectIP\DataBase\LoginDB.mdf;Integrated Security=True;Connect Timeout=30")) { string query = "Select * from [Table] where Username = '******' COLLATE SQL_Latin1_General_CP1_CS_AS and Password= '******' COLLATE SQL_Latin1_General_CP1_CS_AS"; SqlDataAdapter sdata = new SqlDataAdapter(query, sqlCon); DataTable dtbl = new DataTable(); sdata.Fill(dtbl); if (dtbl.Rows.Count == 1) { MainForm objMain = new MainForm(); this.Hide(); objMain.Show(); DisplayEmail(); DisplayName(); DisplayAdress(); } else { MessageBox.Show("Invalid username and/or password!"); } } }