Locadora de livros c#

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data.SqlClient; using System.Configuration;

namespace LocadoraWinApp
{
public partial class Form1 : Form { public Form1() { InitializeComponent(); }

//PREPARANDO CONEXÃO: static bool incluir = false; static string strConexaoSQL = @"Data Source=.\SQLEXPRESS;AttachDbFilename='c:\users\seminovoacer\documents\visual studio 2010\Projects\LocadoraWinApp\LocadoraWinApp\LocadoraDb.mdf';Integrated Security=True;User Instance=True;"; SqlDataReader Dr; SqlConnection con = new SqlConnection(strConexaoSQL);

private void chamaViews() { carregaDadosTreeView(); carregaDadosGridView(); }

private void limpaControles() { foreach (Control ctrl in groupBox1.Controls) { if (ctrl is TextBox) { ((TextBox)ctrl).Clear(); } if (ctrl is CheckBox) { ((CheckBox)ctrl).Checked = false; } }

foreach (Control ctrl in groupBox3.Controls) { if (ctrl is RadioButton) { ((RadioButton)ctrl).Checked = false; } } }

//CARREGA DADOS DOS TEXT BOXES E CHECKBOXES: private void carregaDados(string tituloLivro) { try { con.Open(); SqlCommand cmd = new SqlCommand("SELECT * FROM Livros WHERE livroTitulo = '" + tituloLivro +"'" , con); Dr = cmd.ExecuteReader(); while (Dr.Read()) {