using System;
using System.Data;
using System.Data.Sql;

class MainClass {
    public static void Main(string[] args) {
        using (DataTable SqlSources = SqlDataSourceEnumerator.Instance.GetDataSources()) {
            Console.WriteLine("Discover SQL Server Instances:");
            foreach (DataRow source in SqlSources.Rows) {
                Console.WriteLine(" Server Name:{0}", source["ServerName"]);
                Console.WriteLine("   Instance Name:{0}", source["InstanceName"]);
                Console.WriteLine("   Is Clustered:{0}", source["IsClustered"]);
                Console.WriteLine("   Version:{0}", source["Version"]);
            }
        }
    }

}

    

   


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

   class OrdinalIndexer
   {
      static void Main(string[] args)
      {
         string connString = "server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         string sql = @"select FirstName, LastName from Employee";

         SqlConnection conn = new SqlConnection(connString);

         try
         {
            conn.Open();
            SqlCommand cmd = new SqlCommand(sql, conn);
            SqlDataReader reader = cmd.ExecuteReader();
            Console.WriteLine("	{0}   {1}", "First Name".PadRight(25),"Last Name".PadRight(20));
            Console.WriteLine("	{0}   {1}",  "============".PadRight(25), "============".PadRight(20));
            while(reader.Read()) {
               Console.WriteLine(" {0} | {1}", 
                  reader[0].ToString().PadLeft(25),
                  reader[1].ToString().PadLeft(20));
            }
            reader.Close();
         } catch(Exception e) {
            Console.WriteLine("Error Occurred: " + e);
         } finally {
            conn.Close();
         }
      }
   }


           
          

   


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

   class MultipleResults {
      static void Main(string[] args) {
         string connString = "server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";

         string sql1 = @"select FirstName from Employee;";

         string sql2 = @"select FirstName, LastName from Employee;";

         string sql = sql1 + sql2;

         SqlConnection conn = new SqlConnection(connString);

         try
         {
            conn.Open();
            SqlCommand cmd = new SqlCommand(sql, conn);

            SqlDataReader reader = cmd.ExecuteReader();

            do{
                while(reader.Read()) {
                   Console.WriteLine("{0} : {1}", reader[0], reader[0]);
                }
                Console.WriteLine("".PadLeft(60, '='));
            } while(reader.NextResult());
            reader.Close();
         } catch(Exception e) {
            Console.WriteLine("Error Occurred: " + e);
         } finally {
            conn.Close();
         }
      }  
   }

           
          

   

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

   class DataLooper{
      static void Main(string[] args) {
         string connString = "server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";

         string sql = @"select FirstName from Employee";

         SqlConnection conn = new SqlConnection(connString);

         try {
            conn.Open();
            SqlCommand cmd = new SqlCommand(sql, conn);
            SqlDataReader reader = cmd.ExecuteReader();
            while(reader.Read()) {
               Console.WriteLine("{0}", reader[0]);
            }
            reader.Close();
         }
         catch(Exception e)
         {
            Console.WriteLine("Error Occurred: " + e);
         }
         finally
         {
            conn.Close();
         }
      }
   } 


           
          

   


/*
 * 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 UsingADataReader
    {
        static void Main(string[] args)
        {
            SqlConnection MyConnection = new SqlConnection(@"Data Source=(local); Initial Catalog = CaseManager; Integrated Security=true");

            MyConnection.Open();

            SqlCommand MyCommand = new SqlCommand("SELECT * FROM CaseInfo", MyConnection);
            SqlDataReader MyDataReader = MyCommand.ExecuteReader(CommandBehavior.CloseConnection);

            while (MyDataReader.Read())
            {
                Console.WriteLine(MyDataReader[0] + " " + MyDataReader[1]);
            }

            MyConnection.Close();
        }
    }
}


           
          

   


    using System;
    using System.Data.SqlClient;

  class pubsdemo
  {
    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();

      while(oReader.Read()) {
        Console.WriteLine("{0} {1} {2}",
          oReader["id"],
          oReader["firstname"],
          oReader["lastname"]);
      }
    }
  }


           
          

   


    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));
      }
    }
  }