private void buttonLogin_Click(object sender, RoutedEventArgs e) { Boolean clear = true; if (string.IsNullOrWhiteSpace(this.user.Text)) { MessageBox.Show("Username can't be empty"); this.user.Focus(); clear = false; return; } if (string.IsNullOrWhiteSpace(this.pass.Password)) { MessageBox.Show("Password can't be empty"); this.pass.Focus(); clear = false; } if (clear == true) { try { this.myConnection.Open(); SqlCommand getAll = new SqlCommand("SELECT * FROM users where userName = '******' AND userPass = '******'", myConnection); SqlDataReader runit = getAll.ExecuteReader(); if (runit.Read() == true) { MessageBox.Show("Welcome " + this.user.Text); this.Hide(); userWindow userw = new userWindow(); userw.ShowDialog(); } else { MessageBox.Show("False Username or Password"); this.user.Clear(); this.pass.Clear(); this.user.Focus(); } } catch (SqlException d) { MessageBox.Show(d.ToString()); } finally { this.myConnection.Close(); } } }