ORM框架(ITDOS实战源码)

 ORM提供了实现持久化层的另一种模式，它采用映射元数据来描述对象关系的映射，使得ORM中间件能在任何一个应用的业务逻辑层和数据库层之间充当桥梁。

如以下示例:

 public int GetSystemAccreditMessageInfo(AccreditParam param)
        {
            var where = new Where<User>();
            var countMesage = 0;//记录提醒次数
            HttpCookie cookie = HttpContext.Current.Request.Cookies["UserLogin"] as HttpCookie;
            if (cookie["Login_id"] != null)
            {
                where.And(d => d.id == cookie["Login_id"].ToString());
            }
            where.And(d => d.Del_state == 0);
            var fs = DB.Context.From<User>()
                .Select(User._.All, Power._.All)
                .InnerJoin<Power>((a, b) => a.Role_id == b.id)
                .Where(where);
            if (fs.First().Authority == "0")
            {
                countMesage = 0;
            }
            else if (fs.First().Authority == "1")
            {
                countMesage = DB.Context.From<Accredit>().Where(d => d.OAuditor_signature == null || d.OAuditor_signature == "").Count();
            }
            else if (fs.First().Authority == "2")
            {
                countMesage = DB.Context.From<Accredit>().Where(d => d.TAuditor_signature == null || d.TAuditor_signature == "").Count();
            }
            else if (fs.First().Authority == "3")
            {
                countMesage = DB.Context.From<Accredit>().Where(d => d.OAuditor_signature == null || d.OAuditor_signature == "" || d.TAuditor_signature == null || d.TAuditor_signature == "").Count();
            }
            return countMesage;
        }

public BaseResult AddAccreditInfo(AccreditParam param)
        {
            var model = new Accredit();
            model.id = Guid.NewGuid().ToString();
            model.Acceptance_number = param.Acceptance_number;
            model.Certificate_number = param.Certificate_number;
            model.Issuing_office = param.Issuing_office;
            model.Issue_date = param.Issue_date;
            model.Effective_date = param.Effective_date;
            model.Authorization_projectname = param.Authorization_projectname;
            model.Measuring_range = param.Measuring_range;
            model.Accuracy = param.Accuracy;
            model.Organization_name = param.Organization_name;
            model.Address = param.Address;
            model.Corporate_representative = param.Corporate_representative;
            model.Leading_person = param.Leading_person;
            model.Competent_department = param.Competent_department;
            model.Authorized_area = param.Authorized_area;
            model.Authorization_form = param.Authorization_form;
            model.Approver = param.Approver;
            model.Input_person = param.Input_person;
            model.Input_unit = param.Input_unit;
            model.Acceptance_date = param.Acceptance_date;
            HttpCookie cookie = HttpContext.Current.Request.Cookies["UserLogin"] as HttpCookie;
            if (cookie["OrgId"] != null)
            {
                model.OrgId = cookie["OrgId"].ToString();
            }
            if (cookie["OrgId"]=="63001c38-afa4-4a06-567d-0f39b6b5ca9b")
            {
                model.Processing_state = 0;
            }
            model.Remarks = param.Remarks;
            model.Del_state = 0;
            model.Time = DateTime.Now;
            //model.Processing_state = param.Processing_state;
            model.brand = param.brand;
            var count = DB.Context.Insert<Accredit>(model);
            return new BaseResult(true, model, "", count);
        }

 public BaseResult UptAccreditInfo(AccreditParam param)
        {
            var result = GetUpdateModel(param);
            if (!result.IsSuccess)
                return result;

            var model = (Accredit)result.Data;
            model.Acceptance_number = param.Acceptance_number;
            model.Certificate_number = param.Certificate_number;
            model.Issuing_office = param.Issuing_office;
            model.Issue_date = param.Issue_date;
            model.Effective_date = param.Effective_date;
            model.Authorization_projectname = param.Authorization_projectname;
            model.Measuring_range = param.Measuring_range;
            model.Accuracy = param.Accuracy;
            model.Organization_name = param.Organization_name;
            model.Address = param.Address;
            model.Corporate_representative = param.Corporate_representative;
            model.Leading_person = param.Leading_person;
            model.Competent_department = param.Competent_department;
            model.Authorized_area = param.Authorized_area;
            model.Authorization_form = param.Authorization_form;
            model.Approver = param.Approver;
            model.Input_person = param.Input_person;
            model.Input_unit = param.Input_unit;
            HttpCookie cookie = HttpContext.Current.Request.Cookies["UserLogin"] as HttpCookie;
            if (cookie["OrgId"] != null)
            {
                model.OrgId = cookie["OrgId"].ToString();
            }
            if (cookie["OrgId"] == "63001c38-afa4-4a06-567d-0f39b6b5ca9b")
            {
                model.Processing_state = 0;
            }
            model.Acceptance_date = param.Acceptance_date;
            model.Remarks = param.Remarks;
            model.Del_state = 0;
            //model.Processing_state = param.Processing_state??model.Processing_state;
            model.Time = DateTime.Now;
            model.brand = param.brand;
            var count = DB.Context.Update(model, d => d.id == param.id);
            return new BaseResult(true, model, "", count);
        }