一、Web.config设置
将
<add key="ConnectionString" value="server=127.0.0.1;database=codematic;uid=sa;pwd=1"/>
改为
add key="ConnectionString" value="provider=microsoft.jet.oledb.4.0;data source= "/>
    <add key="dbPath" value="~/App_Data/Data.mdb"/>

二、DbHelperOleDb.cs设置
加：using System.Web; 
将
public static string connectionString = PubConstant.ConnectionString;  
改为
public static string connectionString = ConfigurationManager.AppSettings["ConnectionString"].ToString() + HttpContext.Current.Server.MapPath(ConfigurationManager.AppSettings["dbPath"]) + ";";