asp.net ÏÂweb.configÖÐÅäÖÃÊý¾Ý¿âÁ¬½Ó

1¡¢Web.config ¿ÉÒÔ²ÉÓÃдÁ¬½ÓÌõ¼þ »ò ¸½¼Ó ×.mdf Îļþ
<connectionStrings>
  <add name="Sales"
       providerName="System.Data.SqlClient"
       connectionString= "server=myserver;database=Products;uid=<user name>;pwd=<secure password>" />
  <add name="LocalSqlServer"
       providerName="System.Data.SqlClient"
       connectionString="server=.;database=NorthWind;Integrated Security=SSPI" />
  <add name="Sql2005Express"
        connectionString="Data Source=.\SQLEXPRESS;AttachDbFileName=|DataDirectory|NorthWnd.mdf;Integrated     Security=True;User Instance=true"
         providerName="System.Data.SqlClient"/>
</connectionStrings>
2¡¢×.cs Á¬½ÓÊý¾Ý¿â ´úÂë
   string connectionStr = System.Configuration.ConfigurationManager.ConnectionStrings["LocalSqlServer"].ToString();
3¡¢MSDN - Ë÷Òý - connectionStrings ¿ÉÒԲ鿴web.configÀïÊý¾Ý¿âÁ¬½Ó»ò¸½¼ÓÉèÖá£
ms-help://MS.MSDNQTR.v90.chs/dv_aspnetgenref/html/b6ffbb2e-a4d1-410e-8f7e-9755e92c65de.htm