//声明临时数据库名称
            string temp = DateTime.Now.Year.ToString();
            temp += DateTime.Now.Month.ToString();
            temp += DateTime.Now.Day.ToString();
            temp += DateTime.Now.Hour.ToString();
            temp += DateTime.Now.Minute.ToString();
            temp += DateTime.Now.Second.ToString() + ".bak";
            temp = DBPath.Substring(0, DBPath.LastIndexOf("\\") + 1) + temp;
            //定义临时数据库的连接字符串
            string temp2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+temp;
            //定义目标数据库的连接字符串
            string DBPath2 = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DBPath;
            //创建一个JetEngineClass对象的实例
            JRO.JetEngineClass jt = new JRO.JetEngineClass();
            //使用JetEngineClass对象的CompactDatabase方法压缩修复数据库
            jt.CompactDatabase(DBPath2, temp2);
            //拷贝临时数据库到目标数据库(覆盖)
            File.Copy(temp, DBPath, true);
            //最后删除临时数据库
            File.Delete(temp);
        }
        #endregion

        #region 备份Access数据库
        /// <summary>
        /// 备份Access数据库
        /// </summary>
        /// <param name="srcPath">要备份的数据库绝对路径</param>
        /// <param name="aimPath">备份到的数据库绝对路径</param>
        /// <returns></returns>
        public static void Backup(string srcPath,string aimPath)
        {
           
            if (!File.Exists(srcPath))
            {
                throw new Exception("源数据库不存在,无法备份");
            }
            try
            {
                File.Copy(srcPath,aimPath,true);
            }
            catch(IOException ixp)
            {
                throw new Exception(ixp.ToString());
            }
           
        }

        #endregion

        #region 还原Access数据库
        /// <summary>
        /// 还原Access数据库
        /// </summary>
        /// <param name="bakPath">备份的数据库绝对路径</param>
        /// <param name="dbPath">要还原的数据库绝对路径</param>
        public static void RecoverAccess(string bakPath,string dbPath)
        {          
            if (!File.Exists(bakPath))
            {
                throw new Exception("备份数据库不存在,无法还原");
            }
            try
            {
                File.Copy(bakPath, dbPath, true);
            }
            catch (IOException ixp)
            {
                throw new Exception(ixp.ToString());
            }       
        }       
        #endregion
    }
}