using System;
using System.Data;
using System.Data.SqlClient;  //SqlDataAdapter网站：http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldataadapter.aspx
//SqlCommandBuilder网站：http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommandbuilder.aspx
namespace Chapter13
{  class PersistAddsBuilder  {  static void Main(string[] args)  {  // connection string  string connString = @"  server = .;  integrated security = true;  database = northwind  ";  // query  string qry = @"  select  *  from  employees  where  country = 'UK'  ";  // create connection  SqlConnection conn = new SqlConnection(connString);  try  {  // create data adapter  SqlDataAdapter da = new SqlDataAdapter();  da.SelectCommand = new SqlCommand(qry, conn);  // create command builder  SqlCommandBuilder cb = new SqlCommandBuilder(da);  // create and fill dataset  DataSet ds = new DataSet();  da.Fill(ds, "employees");  // get data table reference  DataTable dt = ds.Tables["employees"];  // add a row  DataRow newRow = dt.NewRow();  newRow["firstname"] = "Roy";  newRow["lastname"] = "Beatty";  newRow["titleofcourtesy"] = "Sir";  newRow["city"] = "Birmingham";  newRow["country"] = "UK";  dt.Rows.Add(newRow);  // display rows  foreach (DataRow row in dt.Rows)  {  Console.WriteLine(  "{0} {1} {2}",  row["firstname"].ToString().PadRight(15),  row["lastname"].ToString().PadLeft(25),  row["city"]);  }  // insert employees  da.Update(ds, "employees");  }  catch (Exception e)  {  Console.WriteLine("Error: " + e);  }  finally  {  // close connection  conn.Close();  }  }  }
}