using System;
using System.Data;
using System.Data.SqlClient;

class ExecuteDDL
{
  public static void Main()
  {
    SqlConnection mySqlConnection =new SqlConnection("server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");

    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();

    mySqlCommand.CommandText =
      "CREATE TABLE MyEmployee (" +
      "  ID int CONSTRAINT PK_Persons PRIMARY KEY," +
      "  FirstName nvarchar(15) NOT NULL," +
      "  LastName nvarchar(15) NOT NULL," +
      "  DateOfBirth datetime" +
      ")";

    mySqlConnection.Open();

    Console.WriteLine("Creating MyEmployee table");
    int result = mySqlCommand.ExecuteNonQuery();
    Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);

    mySqlCommand.CommandText =
      "ALTER TABLE MyEmployee " +
      "ADD EmployerID nchar(5) CONSTRAINT FK_Persons_Customers " +
      "REFERENCES Employee(ID)";

    Console.WriteLine("Altering MyEmployee table");
    result = mySqlCommand.ExecuteNonQuery();
    Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);

    mySqlCommand.CommandText = "DROP TABLE MyEmployee";

    Console.WriteLine("Dropping MyEmployee table");
    result = mySqlCommand.ExecuteNonQuery();
    Console.WriteLine("mySqlCommand.ExecuteNonQuery() = " + result);

    mySqlConnection.Close();
  }
}


           
          

   


using System;
using System.Data;
using System.Data.SqlClient;

   class CommandExampleCreateDb
   {
      static void Main() 
      {
         SqlConnection thisConnection = new SqlConnection("server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI");
         SqlCommand nonqueryCommand = thisConnection.CreateCommand();

         try 
         {
            thisConnection.Open();

            nonqueryCommand.CommandText = "CREATE DATABASE MyDb";
            Console.WriteLine(nonqueryCommand.CommandText);

            nonqueryCommand.ExecuteNonQuery();
            Console.WriteLine("Database created, now switching");
            thisConnection.ChangeDatabase("MyDb");

            nonqueryCommand.CommandText = "CREATE TABLE MyJava2sTable (COL1 integer)";
            Console.WriteLine(nonqueryCommand.CommandText);
            Console.WriteLine("Number of Rows Affected is: {0}", nonqueryCommand.ExecuteNonQuery());

            nonqueryCommand.CommandText = "INSERT INTO MyJava2sTable VALUES (99)";
            Console.WriteLine(nonqueryCommand.CommandText);
            Console.WriteLine("Number of Rows Affected is: {0}", nonqueryCommand.ExecuteNonQuery());
         
         } catch (SqlException ex) {
         
            Console.WriteLine(ex.ToString());
         
         } finally {  
         
            thisConnection.Close();
            Console.WriteLine("Connection Closed.");
         
         }
      }
   }


           
          

   


    using System;
    using System.Data.SqlClient;
  
  class ConnectToSqlConnection {
    static void Main(string[] args)  {
      String sConn = "server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";

        String sSQL = "select id, firstname, lastname from Employee";

      SqlConnection oConn = new SqlConnection(sConn);
      oConn.Open();

      SqlCommand oCmd = new SqlCommand(sSQL, oConn);
      SqlDataReader oReader = oCmd.ExecuteReader();

      int idxID = oReader.GetOrdinal("id");
      int idxFirstName = oReader.GetOrdinal("firstname");
      int idxLastName = oReader.GetOrdinal("lastname");

      while(oReader.Read()) {
        Console.WriteLine("{0} {1} {2}",
          oReader.GetValue(idxID),
          oReader.GetValue(idxFirstName),
          oReader.GetValue(idxLastName));
      }
    }
  }


           
          

   

using System;
using System.Data.OleDb;

public class ReadFromOleDb
{
  [STAThread]
  static void Main(string[] args)
  {
    String sConn = "provider=sqloledb;server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
    
    String sSQL = "select id, firstname, lastname from Employee";

    OleDbConnection oConn = new OleDbConnection(sConn);
    oConn.Open();

    OleDbCommand oCmd = new OleDbCommand(sSQL, oConn);
    OleDbDataReader oReader = oCmd.ExecuteReader();

    int idxID = oReader.GetOrdinal("id");
    int idxFirstName = oReader.GetOrdinal("firstname");
    int idxLastName = oReader.GetOrdinal("lastname");

    while(oReader.Read()) {
      Console.WriteLine("{0} {1} {2}",
        oReader.GetValue(idxID),
        oReader.GetValue(idxFirstName),
        oReader.GetValue(idxLastName));
    }
  }
}



           
          

   

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

    public class Form1 : System.Windows.Forms.Form {
      private System.Windows.Forms.TextBox textBox1;
      private System.Windows.Forms.TextBox textBox2;
      private System.Windows.Forms.Button buttonBack;
      private System.Windows.Forms.Button buttonNext;
      private System.Data.DataSet dataSet1;
      private System.ComponentModel.Container components = null;

      private BindingManagerBase bMgr;

      public Form1() {
        InitializeComponent();
      }

      private void InitializeComponent() {
         this.textBox1 = new System.Windows.Forms.TextBox();
         this.textBox2 = new System.Windows.Forms.TextBox();
         this.buttonBack = new System.Windows.Forms.Button();
         this.buttonNext = new System.Windows.Forms.Button();
         this.dataSet1 = new System.Data.DataSet();
         ((System.ComponentModel.ISupportInitialize)(this.dataSet1)).BeginInit();
         this.SuspendLayout();

         this.textBox1.Location = new System.Drawing.Point(8, 8);
         this.textBox1.Name = "textBox1";
         this.textBox1.Size = new System.Drawing.Size(160, 20);
         this.textBox1.TabIndex = 0;
         this.textBox1.Text = "textBox1";

         this.textBox2.Location = new System.Drawing.Point(8, 40);
         this.textBox2.Name = "textBox2";
         this.textBox2.Size = new System.Drawing.Size(160, 20);
         this.textBox2.TabIndex = 1;
         this.textBox2.Text = "textBox2";

         this.buttonBack.Location = new System.Drawing.Point(24, 80);
         this.buttonBack.Name = "buttonBack";
         this.buttonBack.Size = new System.Drawing.Size(56, 23);
         this.buttonBack.TabIndex = 2;
         this.buttonBack.Text = "<< Back";
         this.buttonBack.Click += new System.EventHandler(this.buttonBack_Click);

         this.buttonNext.Location = new System.Drawing.Point(96, 80);
         this.buttonNext.Name = "buttonNext";
         this.buttonNext.Size = new System.Drawing.Size(56, 23);
         this.buttonNext.TabIndex = 3;
         this.buttonNext.Text = "Next>>";
         this.buttonNext.Click += new System.EventHandler(this.buttonNext_Click);

         this.dataSet1.DataSetName = "NewDataSet";
         this.dataSet1.Locale = new System.Globalization.CultureInfo("en-US");

         this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
         this.ClientSize = new System.Drawing.Size(176, 108);
         this.Controls.Add(this.buttonNext);
         this.Controls.Add(this.buttonBack);
         this.Controls.Add(this.textBox2);
         this.Controls.Add(this.textBox1);
         this.Name = "Form1";
         this.Text = "Form1";
         this.Load += new System.EventHandler(this.Form1_Load);
         ((System.ComponentModel.ISupportInitialize)(this.dataSet1)).EndInit();
         this.ResumeLayout(false);
      }

      static void Main() {
         Application.Run(new Form1());
      }

      private void Form1_Load(object sender, System.EventArgs e) {
         string connString = "server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         string sql = @"select * from employee ";

         SqlConnection conn = new SqlConnection(connString);
         SqlDataAdapter da = new SqlDataAdapter(sql, conn);
         da.Fill(dataSet1, "employee");

         textBox1.DataBindings.Add("text", dataSet1, "employee.firstname");
         textBox2.DataBindings.Add("text", dataSet1, "employee.lastname");
  
         bMgr = this.BindingContext[dataSet1, "employee"];
      }

      private void buttonNext_Click(object sender, System.EventArgs e) {
         bMgr.Position += 1;    
      }

      private void buttonBack_Click(object sender, System.EventArgs e) {
         bMgr.Position -= 1;
      }
    }



           
          

   


/*
 * C# Programmers Pocket Consultant
 * Author: Gregory S. MacBeth
 * Email: gmacbeth@comporium.net
 * Create Date: June 27, 2003
 * Last Modified Date:
 * Version: 1
 */
using System;
using System.Data;
using System.Data.SqlClient;

namespace Client.Chapter_13___ADO.NET
{
    public class UsingADONETEvents
    {
        static void Main(string[] args)
        {
            SqlConnection MyConnection = new SqlConnection(@"Data Source=(local); Initial Catalog = CaseManager; Integrated Security=true");

            MyConnection.StateChange += new StateChangeEventHandler(OnStateChange);
            MyConnection.Open(); //Trigger Open Event
            MyConnection.Close();
        }
        public static void OnStateChange(object sender, System.Data.StateChangeEventArgs e)
        {
            Console.WriteLine("Connection State Chnaged: {0}", ((SqlConnection)sender).State);
        }
    }
}


           
          

   

using System;
using System.Data;
using System.Data.OleDb;

class AccessConnect {
   static void Main() 
   {
      string connString = @"provider = microsoft.jet.oledb.4.0;data source = Employee.mdb;";

      OleDbConnection conn = new OleDbConnection(connString);

      try 
      {
         conn.Open();
         Console.WriteLine("Connection opened.");

         Console.WriteLine("Connection Properties:");   
         Console.WriteLine("	Connection String: {0}", conn.ConnectionString);    
         Console.WriteLine("	Database: {0}",conn.Database);   
         Console.WriteLine("	DataSource: {0}",conn.DataSource);
         Console.WriteLine("	ServerVersion: {0}", conn.ServerVersion);
         Console.WriteLine("	State: {0}", conn.State);
      } catch (OleDbException e) {
         Console.WriteLine("Error: " + e);  
      } finally  {
         conn.Close();
         Console.WriteLine("Connection closed.");
      }
   }
}