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using System.Data;            // Use ADO.NET namespace
using System.Data.SqlClient;  
 SqlConnection thisConnection = new SqlConnection(
            @"Data Source=GY; Initial Catalog=northwind;uid=sa;password=datadog"); //ÏȽ¨Á¢Á¬½Ó
 thisConnection.Open();//´ò¿ªÁ¬½Ó
         SqlCommand thisCommand = thisConnection.CreateCommand();//Ö±½ÓÖ¸¶¨connµÄcommand
Ò²¿ÉÒÔÕâÑù        //  SqlCommand cmd = new SqlCommand();
       //  cmd.Connection = thisConnection;
cmmandµÄsqlÃüÁî         
thisCommand.CommandText = "SELECT CustomerID, CompanyName from Customer";
         SqlDataReader thisReader = thisCommand.ExecuteReader();//sqldatareader²»¿ÉÒÔÓÃnew ±ØÐëÖ±½ÓÓëcommand¹ØÁª
//ÓÃreader¶Á³ö±í
         while (thisReader.Read())
         {
            // Output ID and name columns
            Console.WriteLine("\t{0}\t{1}", 
               thisReader["CustomerID"], thisReader["CompanyName"]);
         // Close reader ÓÃÍêÒª¹Ø±Õ
         thisReader.Close();
   


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ASP.NET·ÀSQL×¢Èë½Å±¾³ÌÐò v2.0

public class SqlCheck
{
public SqlCheck()
{
//
// TODO: ÔÚ´Ë´¦Ìí¼Ó¹¹Ô캯ÊýÂß¼­
//
}

public SqlConnection oconn()
{
SqlConnection conn = new SqlConnection();
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SQL Server 2005 ĬÈÏsaÎÞ·¨µÇ½

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