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

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

         SqlConnection cn = new SqlConnection(connString);

         cn.InfoMessage += new SqlInfoMessageEventHandler(CnInfoMessage);
         cn.StateChange += new StateChangeEventHandler(CnStateChange); 

         SqlCommand cmd = new SqlCommand();
         cmd.CommandText = "SELECT TOP 2 Id FROM Employee";
         cmd.Connection = cn;

         try
         {
            cn.Open();

            SqlDataReader dr = cmd.ExecuteReader();      

            while(dr.Read())
            {
               Console.WriteLine(dr.GetInt32(0));    
            }
            dr.Close();

            cmd.CommandText = "PRINT 'Get Id for all Employees'";
            cmd.ExecuteNonQuery();
         }
         catch(SqlException ex)
         {
            Console.WriteLine(ex.Message);
         }      
         finally
         {
            cn.Close();
         }      
      }


      static void CnInfoMessage(object sender, SqlInfoMessageEventArgs ev)
      {
         foreach (SqlError err in ev.Errors)
         {
            Console.WriteLine("Entering InfoMessage Event Handler");
            Console.WriteLine("Source- " + err.Source);
            Console.WriteLine("State- " + err.State);
            Console.WriteLine("Number- " + err.Number);
            Console.WriteLine("Procedure- " + err.Procedure);
            Console.WriteLine("Server- " + err.Server);
            Console.WriteLine("Message- " + err.Message);
            Console.WriteLine("Exiting InfoMessage Event Handler");
         }
      }

      static void CnStateChange(object sender, StateChangeEventArgs ev)
      {
         Console.WriteLine("Entering StateChange EventHandler");
         Console.WriteLine("Sender = "+ sender.ToString());
         Console.WriteLine("Original State = "+ ev.OriginalState.ToString());
         Console.WriteLine("Current State = "+ ev.CurrentState.ToString()); 
         Console.WriteLine("Exiting StateChange EventHandler");
      }

   }

           
          

   



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

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

         SqlConnection cn = new SqlConnection(connString);

         SqlCommand cmd = new SqlCommand();
         cmd.CommandText = "SELECT TOP 1 Id, FirstName FROM Employee";
         cmd.Connection = cn;
         cn.StateChange += new StateChangeEventHandler(CnStateChange);

         try
         {
            cn.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            while(dr.Read()) {
               Console.WriteLine(dr.GetString(0) + "-" + dr.GetString(1));
            }
         }
         catch(SqlException e1)
         {
            Console.WriteLine(e1.Message);
         }
         finally
         {
            cn.Close();
         }
      }


      static void CnStateChange(object sender, StateChangeEventArgs ev)
      {
         Console.WriteLine("------------------------------");
         Console.WriteLine("Entering StateChange EventHandler");
         Console.WriteLine("Sender = "+ sender.ToString());
         Console.WriteLine("Original State = "+ ev.OriginalState.ToString());
         Console.WriteLine("Current State = "+ ev.CurrentState.ToString()); 
         Console.WriteLine("Exiting StateChange EventHandler");
         Console.WriteLine("------------------------------");
      }

   }
           
          

   
 
using System;
using System.Data.SqlClient;

class MainClass {
    public static void Main(string[] args) {
        string conString = @"Data Source=.sqlexpress;" +
            "Database=Northwind;Integrated Security=SSPI;" +
            "Min Pool Size=5;Max Pool Size=15;Connection Reset=True;" +
            "Connection Lifetime=600;";

        SqlConnectionStringBuilder sb1 = new SqlConnectionStringBuilder(conString);
        Console.WriteLine("  Database Source = " + sb1.DataSource);

        SqlConnectionStringBuilder sb2 = new SqlConnectionStringBuilder(conString);

        sb2.DataSource = @".sqlexpress";

        Console.WriteLine("  " + sb2.ConnectionString);

    }
}

    

   
 

using System;
using System.Data.SqlClient;

class MainClass {
    public static void Main() {
        using (SqlConnection con = new SqlConnection()) {
            con.ConnectionString =
               @"Data Source = .sqlexpress;" +// local SQL Server instance
               "Database = Northwind;" +       // the sample Northwind DB
               "Integrated Security = SSPI;" + // integrated Windows security
               "Min Pool Size = 5;" +          // configure minimum pool size
               "Max Pool Size = 15;" +         // configure maximum pool size
               "Connection Reset = True;" +    // reset connections each use
               "Connection Lifetime = 600";    // set max connection lifetime
            con.Open();
        }

        using (SqlConnection con = new SqlConnection()) {
            con.ConnectionString =
                @"Data Source = .sqlexpress;" +//local SQL Server instance
                "Database = Northwind;" +       //the sample Northwind DB
                "Integrated Security = SSPI;" + //integrated Windows security
                "Pooling = False";              //specify nonpooled connection
            con.Open();
        }

    }
}

    

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

class MainClass {
    public static void Main() {
        using (SqlConnection con = new SqlConnection()) {
            con.ConnectionString = @"Data Source=.sqlexpress;Database=Northwind;Integrated Security=SSPI";    

            con.Open();

            if (con.State == ConnectionState.Open) {
                Console.WriteLine("  Packet Size = " + con.PacketSize);
            } else {
                Console.WriteLine("SqlConnection failed to open.");
                Console.WriteLine("  Connection State = " + con.State);
            }
        }
    }
}

    

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

class MainClass {
    public static void Main() {
        using (SqlConnection con = new SqlConnection()) {
            con.ConnectionString = @"Data Source=.sqlexpress;Database=Northwind;Integrated Security=SSPI";    

            con.Open();

            if (con.State == ConnectionState.Open) {
                Console.WriteLine("  Timeout = " + con.ConnectionTimeout);
            } else {
                Console.WriteLine("SqlConnection failed to open.");
                Console.WriteLine("  Connection State = " + con.State);
            }

        }
    }
}

    

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

class MainClass {
    public static void Main() {
        using (SqlConnection con = new SqlConnection()) {
            con.ConnectionString = @"Data Source=.sqlexpress;Database=Northwind;Integrated Security=SSPI";    

            con.Open();

            if (con.State == ConnectionState.Open) {
                Console.WriteLine("  Workstation Id = " + con.WorkstationId);
            } else {
                Console.WriteLine("SqlConnection failed to open.");
                Console.WriteLine("  Connection State = " + con.State);
            }

        }
    }
}