SqlDataAdapter和SqlCommandBuilder添加数据

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();
}
}
}
}