Access 数据库连接 字符串

<!--Microsoft.Practices.EnterpriseLibrary.Data.dll    操作引用程序集-->
  <connectionStrings>
    <add name="AccessConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|AccessDB.mdb" providerName="System.Data.OleDb" />     
  </connectionStrings>

 static Database db = DatabaseFactory.CreateDatabase("AccessConnectionString");