addressbook.cs

this is a good book for the visual c#

// Fig. 19.29: AddressBook.cs
// Using SQL statements to manipulate a database.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace AddressBook
{
   /// <summary>
   /// Summary description for AddressBook.
   /// </summary>
   public class AddressBook : System.Windows.Forms.Form
   {
      private System.Windows.Forms.TextBox faxTextBox;
      private System.Windows.Forms.TextBox homeTextBox;
      private System.Windows.Forms.TextBox firstTextBox;
      private System.Windows.Forms.TextBox stateTextBox;
      private System.Windows.Forms.TextBox idTextBox;
      private System.Windows.Forms.TextBox lastTextBox;
      private System.Windows.Forms.TextBox postalTextBox;
      private System.Windows.Forms.TextBox addressTextBox;
      private System.Windows.Forms.TextBox cityTextBox;
      private System.Windows.Forms.TextBox countryTextBox;
      private System.Windows.Forms.TextBox emailTextBox;
      private System.Data.DataSet dataSet1;
      private System.Data.OleDb.OleDbDataAdapter oleDbDataAdapter1;
      private System.Data.OleDb.OleDbCommand oleDbSelectCommand1;
      private System.Data.OleDb.OleDbCommand oleDbInsertCommand1;
      private System.Data.OleDb.OleDbCommand oleDbUpdateCommand1;
      private System.Data.OleDb.OleDbCommand oleDbDeleteCommand1;
      private System.Windows.Forms.TextBox statusTextBox;
      private System.Windows.Forms.Label addressLabel;
      private System.Windows.Forms.Label cityLabel;
      private System.Windows.Forms.Label stateLabel;
      private System.Windows.Forms.Label idLabel;
      private System.Windows.Forms.Label firstLabel;
      private System.Windows.Forms.Label lastLabel;
      private System.Windows.Forms.Label postalLabel;
      private System.Windows.Forms.Label countryLabel;
      private System.Windows.Forms.Label emailLabel;
      private System.Windows.Forms.Button clearButton;
      private System.Windows.Forms.Button helpButton;
      private System.Windows.Forms.Button findButton;
      private System.Windows.Forms.Button addButton;
      private System.Windows.Forms.Button updateButton;
      private System.Windows.Forms.Label faxLabel;
      private System.Windows.Forms.Label homeLabel;
      private System.Data.OleDb.OleDbCommand oleDbSelectCommand2;
      private System.Data.OleDb.OleDbCommand oleDbInsertCommand2;
      private System.Data.OleDb.OleDbCommand oleDbUpdateCommand2;
      private System.Data.OleDb.OleDbCommand oleDbDeleteCommand2;
      private System.Data.OleDb.OleDbConnection oleDbConnection1;
      /// <summary>
      /// Required designer variable.
      /// </summary>
      private System.ComponentModel.Container components = null;

      public AddressBook()
      {
         //
         // Required for Windows Form Designer support
         //
         InitializeComponent();

         //
         // TODO: Add any constructor code after InitializeComponent call
         //
         oleDbConnection1.Open();
      }

      /// <summary>
      /// Clean up any resources being used.
      /// </summary>
      protected override void Dispose( bool disposing )
      {
         if( disposing )
         {
            if (components != null) 
            {
               components.Dispose();
            }
         }
         base.Dispose( disposing );
      }

		#region Windows Form Designer generated code
      /// <summary>
      /// Required method for Designer support - do not modify
      /// the contents of this method with the code editor.
      /// </summary>
      private void InitializeComponent()
      {
         this.countryLabel = new System.Windows.Forms.Label();
         this.emailLabel = new System.Windows.Forms.Label();
         this.addressLabel = new System.Windows.Forms.Label();
         this.cityLabel = new System.Windows.Forms.Label();
         this.stateLabel = new System.Windows.Forms.Label();
         this.faxTextBox = new System.Windows.Forms.TextBox();
         this.homeTextBox = new System.Windows.Forms.TextBox();
         this.idLabel = new System.Windows.Forms.Label();
         this.firstLabel = new System.Windows.Forms.Label();
         this.lastLabel = new System.Windows.Forms.Label();
         this.firstTextBox = new System.Windows.Forms.TextBox();
         this.stateTextBox = new System.Windows.Forms.TextBox();
         this.clearButton = new System.Windows.Forms.Button();
         this.helpButton = new System.Windows.Forms.Button();
         this.idTextBox = new System.Windows.Forms.TextBox();
         this.lastTextBox = new System.Windows.Forms.TextBox();
         this.findButton = new System.Windows.Forms.Button();
         this.addButton = new System.Windows.Forms.Button();
         this.updateButton = new System.Windows.Forms.Button();
         this.postalTextBox = new System.Windows.Forms.TextBox();
         this.addressTextBox = new System.Windows.Forms.TextBox();
         this.cityTextBox = new System.Windows.Forms.TextBox();
         this.postalLabel = new System.Windows.Forms.Label();
         this.countryTextBox = new System.Windows.Forms.TextBox();
         this.emailTextBox = new System.Windows.Forms.TextBox();
         this.faxLabel = new System.Windows.Forms.Label();
         this.homeLabel = new System.Windows.Forms.Label();
         this.statusTextBox = new System.Windows.Forms.TextBox();
         this.dataSet1 = new System.Data.DataSet();
         this.oleDbDataAdapter1 = new System.Data.OleDb.OleDbDataAdapter();
         this.oleDbDeleteCommand2 = new System.Data.OleDb.OleDbCommand();
         this.oleDbConnection1 = new System.Data.OleDb.OleDbConnection();
         this.oleDbInsertCommand2 = new System.Data.OleDb.OleDbCommand();
         this.oleDbSelectCommand2 = new System.Data.OleDb.OleDbCommand();
         this.oleDbUpdateCommand2 = new System.Data.OleDb.OleDbCommand();
         this.oleDbDeleteCommand1 = new System.Data.OleDb.OleDbCommand();
         this.oleDbInsertCommand1 = new System.Data.OleDb.OleDbCommand();
         this.oleDbSelectCommand1 = new System.Data.OleDb.OleDbCommand();
         this.oleDbUpdateCommand1 = new System.Data.OleDb.OleDbCommand();
         ((System.ComponentModel.ISupportInitialize)(this.dataSet1)).BeginInit();
         this.SuspendLayout();
         // 
         // countryLabel
         // 
         this.countryLabel.Location = new System.Drawing.Point(16, 264);
         this.countryLabel.Name = "countryLabel";
         this.countryLabel.Size = new System.Drawing.Size(152, 16);
         this.countryLabel.TabIndex = 6;
         this.countryLabel.Text = "Country:";
         this.countryLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
         // 
         // emailLabel
         // 
         this.emailLabel.Location = new System.Drawing.Point(16, 296);
         this.emailLabel.Name = "emailLabel";
         this.emailLabel.Size = new System.Drawing.Size(152, 16);
         this.emailLabel.TabIndex = 6;
         this.emailLabel.Text = "Email:";
         this.emailLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
         // 
         // addressLabel
         // 
         this.addressLabel.Location = new System.Drawing.Point(16, 136);
         this.addressLabel.Name = "addressLabel";
         this.addressLabel.Size = new System.Drawing.Size(152, 16);
         this.addressLabel.TabIndex = 6;
         this.addressLabel.Text = "Address:";
         this.addressLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
         // 
         // cityLabel
         // 
         this.cityLabel.Location = new System.Drawing.Point(16, 168);
         this.cityLabel.Name = "cityLabel";