数据库的相对路径字符串

 Private Function GetConnStr() As String
        GetConnStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Application.StartupPath + "\" + "booksystem.mdb" + ";User Id=;Password=;" ' ConfigurationSettings '2获取web.config文件的数据库连接设置字串
    End Function