web.config
<appSettings>
<add key="ConnectionString" value="data/data.mdb" />
</appSettings>
cs中:
string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath(System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]);
注意 Server.MapPath 再单独的类中要用
System.Web.HttpContext.Current.Server.MapPath