DDD领域驱动设计初探(7):Web层的搭建_html/css_WEB-ITnose
一、UI层介绍
在DDD里面,UI层的设计也分为BS和CS,本篇还是以Web为例来说明。我们的Web采用的是MVC+bootstrap的架构。Table组件使用的是bootstrap table,之所以用它是因为它的API比较全,并且博主觉得它的风格适用于各种类型的设备,无论是PC端还是手机端都都能很好的兼容各种浏览器。
这里还是贴出bootstrap API的相关地址。
Bootstrap中文网:http://www.bootcss.com/
Bootstrap Table Demo:http://issues.wenzhixin.net.cn/bootstrap-table/index.html
Bootstrap Table API:http://bootstrap-table.wenzhixin.net.cn/zh-cn/documentation/
Bootstrap Table源码:https://github.com/wenzhixin/bootstrap-table
Bootstrap DataPicker:http://www.bootcss.com/p/bootstrap-datetimepicker/
Bootstrap离线API
二、代码示例
上篇完成了WCF的设计代码,但是具体的业务逻辑的代码还没有,我们先来实现具体业务的CURD代码。
1、WCF代码
1.1 WCF服务业务接口代码
/// /// 权限管理模块接口契约 /// [ServiceContract] [ServiceInterface] public interface IPowerManageWCFService { #region 用户管理 [OperationContract] List GetUsers(ExpressionNode expressionNode); [OperationContract] DTO_TB_USERS AddUser(DTO_TB_USERS oUser); [OperationContract] bool DeleteUser(DTO_TB_USERS oUser); [OperationContract] bool DeleteUserByLamada(ExpressionNode expressionNode); [OperationContract] bool UpdateUser(DTO_TB_USERS oUser); #endregion #region 部门管理 [OperationContract] List GetDepartments(ExpressionNode expressionNode); [OperationContract] DTO_TB_DEPARTMENT AddDepartment(DTO_TB_DEPARTMENT oDept); [OperationContract] bool DeleteDepartment(DTO_TB_DEPARTMENT oDept); [OperationContract] bool DeleteDeptByLamada(ExpressionNode expressionNode); [OperationContract] bool UpdateDepartment(DTO_TB_DEPARTMENT oDept); #endregion #region 角色管理 [OperationContract] List GetRoles(ExpressionNode expressionNode); [OperationContract] DTO_TB_ROLE AddRole(DTO_TB_ROLE oRole); #endregion #region 菜单管理 [OperationContract] List GetMenus(ExpressionNode expressionNode); [OperationContract] DTO_TB_MENU AddMenu(DTO_TB_MENU oMenu); #endregion }
1.2 WCF接口实现代码:
[ServiceClass] public class PowerManageWCFService :BaseService, IPowerManageWCFService { #region Fields [Import] private IUserRepository userRepository { get; set; } [Import] private IDepartmentRepository departmentRepository { get; set; } [Import] private IRoleRepository roleRepository { get; set; } [Import] private IMenuRepository menuRepository { get; set; } #endregion #region Constust public PowerManageWCFService() { } #endregion #region WCF服务接口实现 #region 用户管理 //这里参数为什么不直接用Expression>这种类型,是因为Expression不支持序列化,无法用于WCF数据的传递 public List GetUsers(ExpressionNode expressionNode) { Expressionbool>> selector = null; if (expressionNode != null) { selector = expressionNode.ToExpressionbool>>(); } var lstRes = base.GetDtoByLamada(userRepository, selector); return lstRes; } public DTO_TB_USERS AddUser(DTO_TB_USERS oUser) { return base.AddDto(userRepository, oUser); } public bool DeleteUser(DTO_TB_USERS oUser) { var bRes = false; try { base.DeleteDto(userRepository, oUser); bRes = true; } catch { } return bRes; } public bool DeleteUserByLamada(ExpressionNode expressionNode) { Expressionbool>> selector = null; if (expressionNode != null) { selector = expressionNode.ToExpressionbool>>(); } var bRes = false; try { base.DeleteDto(userRepository, selector); bRes = true; } catch { } return bRes; } public bool UpdateUser(DTO_TB_USERS oUser) { var bRes = false; try { base.UpdateDto(userRepository, oUser); bRes = true; } catch { } return bRes; } #endregion #region 部门管理 public List GetDepartments(ExpressionNode expressionNode) { Expressionbool>> selector = null; if (expressionNode != null) { selector = expressionNode.ToExpressionbool>>(); } return base.GetDtoByLamada(departmentRepository, selector); } public DTO_TB_DEPARTMENT AddDepartment(DTO_TB_DEPARTMENT oDept) { return base.AddDto(departmentRepository, oDept); } public bool DeleteDepartment(DTO_TB_DEPARTMENT oDept) { var bRes = false; try { base.DeleteDto(departmentRepository, oDept); bRes = true; } catch { } return bRes; } public bool DeleteDeptByLamada(ExpressionNode expressionNode) { Expressionbool>> selector = null; if (expressionNode != null) { selector = expressionNode.ToExpressionbool>>(); } var bRes = false; try { base.DeleteDto(departmentRepository, selector); bRes = true; } catch { } return bRes; } public bool UpdateDepartment(DTO_TB_DEPARTMENT oDept) { var bRes = false; try { base.UpdateDto(departmentRepository, oDept); bRes = true; } catch { } return bRes; } #endregion #region 角色管理 public List GetRoles(ExpressionNode expressionNode) { Expressionbool>> selector = null; if (expressionNode != null) { selector = expressionNode.ToExpressionbool>>(); } return base.GetDtoByLamada(roleRepository, selector); } public DTO_TB_ROLE AddRole(DTO_TB_ROLE oRole) { return base.AddDto(roleRepository, oRole); } #endregion #region 菜单管理 public List GetMenus(ExpressionNode expressionNode) { Expressionbool>> selector = null; if (expressionNode != null) { selector = expressionNode.ToExpressionbool>>(); } return base.GetDtoByLamada(menuRepository, selector); } public DTO_TB_MENU AddMenu(DTO_TB_MENU oMenu) { return base.AddDto(menuRepository, oMenu); } #endregion #endregion }
这里要说明一点,在通过lamada表达式查询的方法里面为什么不直接用Expression>这种类型,而要使用ExpressionNode这种类型的变量呢?
这是因为Expression不支持序列化,无法用于WCF数据的传递。ExpressionNode这个对象的使用需要添加Serialize.Linq这个dll的引用,还好有我们神奇的NuGet,让我们再也不用去网上找一大堆的dll了。
我们公用的增删改查封装到了BaseService这个父类里面。
1.3 BaseService代码
public class BaseService { #region Fields private bool bInitAutoMapper = false; #endregion #region Construct public BaseService() { //注册MEF Regisgter.regisgter().ComposeParts(this); } #endregion #region 查询 /// /// 通用单表查询方法 /// /// DTOmodel /// 领域模型 /// 需要传过来的仓储接口对象 /// 前端传过来的lamada表达式 /// public List GetDtoByLamada(IRepository oRepository, Expressionbool>> selector = null) where DomainModel : AggregateRoot where DtoModel : Dto_BaseModel { InitAutoMapper(); if (selector == null) { var lstDomainModel = oRepository.Entities.ToList(); return Mapper.Map, List>(lstDomainModel); } //得到从Web传过来和DTOModel相关的lamaba表达式的委托 Funcbool> match = selector.Compile(); //创建映射Expression的委托 Func mapper = AutoMapper.QueryableExtensions.Extensions.CreateMapExpression(Mapper.Engine).Compile(); //得到领域Model相关的lamada Expressionbool>> lamada = ef_t => match(mapper(ef_t)); List list = oRepository.Find(lamada).ToList(); return Mapper.Map, List>(list); } #endregion #region 新增 public DtoModel AddDto(IRepository oRepository, DtoModel oDtoModel) where DomainModel : AggregateRoot where DtoModel : Dto_BaseModel { InitAutoMapper(); var oDomain = Mapper.Map(oDtoModel); oRepository.Insert(oDomain); return Mapper.Map(oDomain); } #endregion #region 删除 public int DeleteDto(IRepository oRepository, DtoModel oDtoModel) where DomainModel : AggregateRoot where DtoModel : Dto_BaseModel { InitAutoMapper(); var oDomain = Mapper.Map(oDtoModel); return oRepository.Delete(oDomain); } public int DeleteDto(IRepository oRepository, Expressionbool>> selector = null) where DomainModel : AggregateRoot where DtoModel : Dto_BaseModel { InitAutoMapper(); if (selector == null) { return 0; } //得到从Web传过来和DTOModel相关的lamaba表达式的委托 Funcbool> match = selector.Compile(); //创建映射Expression的委托 Func mapper = AutoMapper.QueryableExtensions.Extensions.CreateMapExpression(Mapper.Engine).Compile(); //得到领域Model相关的lamada Expressionbool>> lamada = ef_t => match(mapper(ef_t)); return oRepository.Delete(lamada); } #endregion #region 更新 public void UpdateDto(IRepository oRepository, DtoModel oDtoModel) where DomainModel : AggregateRoot where DtoModel : Dto_BaseModel { InitAutoMapper(); var oDomain = Mapper.Map(oDtoModel); oRepository.Update(oDomain); } #endregion #region Private private void InitAutoMapper() { var oType = Mapper.FindTypeMapFor(); if (oType==null) { Mapper.CreateMap(); Mapper.CreateMap(); } } #endregion }
这个父类主要做了两件事:一是MEF的初始化;二是通用增删改查的实现。所有dto对象和领域model的映射都在这里统一管理。
2、UI层代码
UI层里面,为了更好分离代码,我们引入了接口编程的机制,引入了ESTM.Web.IBLL和ESTM.Web.BLL两个项目,如图:
为什么要有这么一个接口层?之前 MEF实现设计上的“松耦合”(终结篇:面向接口编程)这篇已经做过介绍,对面向接口编程不了解的朋友可以看看。
2.1 ESTM.Web.IBLL代码
这个dll主要定义接口规则。
public interface IPowerManager { List GetUsers(Expressionbool>> selector = null); DTO_TB_USERS AddUser(DTO_TB_USERS oUser); bool DeleteUser(DTO_TB_USERS oUser); bool UpdateUser(DTO_TB_USERS oUser); bool DeleteUser(Expressionbool>> selector = null); List GetDepartments(Expressionbool>> selector = null); DTO_TB_DEPARTMENT AddDepartment(DTO_TB_DEPARTMENT oDept); bool DeleteDepartment(DTO_TB_DEPARTMENT oDept); bool DeleteDepartment(Expressionbool>> selector = null); bool UpdateDepartment(DTO_TB_DEPARTMENT oDept); List GetRoles(Expressionbool>> selector = null); List GetMenus(Expressionbool>> selector = null); }
2.2 ESTM.Web.BLL代码
这个dll用于实现ESTM.Web.IBLL里面的接口方法
[Export(typeof(IPowerManager))] public class PowerManager : IPowerManager { #region Fields //创建WCF服务连接对象 private ServiceReference_PowerManager.PowerManageWCFServiceClient oService = CreatePowerManagerService.GetInstance(); #endregion #region 接口实现 public List GetUsers(Expressionbool>> selector = null) { return oService.GetUsers(GetExpressionNode(selector)); } public List GetDepartments(Expressionbool>> selector = null) { return oService.GetDepartments(GetExpressionNode(selector)); } public List GetRoles(Expressionbool>> selector = null) { return oService.GetRoles(GetExpressionNode(selector)); } public List GetMenus(Expressionbool>> selector = null) { return oService.GetMenus(GetExpressionNode(selector)); } #endregion #region Privates //将lamada表达式转换为可用于WCF传递的ExpressionNode类型 private ExpressionNode GetExpressionNode(Expressionbool>> selector) { if (selector == null) { return null; } ExpressionConverter expressionConverter = new ExpressionConverter(); ExpressionNode expressionNode = expressionConverter.Convert(selector); return expressionNode; } #endregion public DTO_TB_USERS AddUser(DTO_TB_USERS oUser) { return oService.AddUser(oUser); } public bool DeleteUser(DTO_TB_USERS oUser) { return oService.DeleteUser(oUser); } public bool DeleteUser(Expressionbool>> selector = null) { if (selector == null) { return false; } ExpressionConverter expressionConverter = new ExpressionConverter(); ExpressionNode expressionNode = expressionConverter.Convert(selector); return oService.DeleteUserByLamada(expressionNode); } public bool UpdateUser(DTO_TB_USERS oUser) { return oService.UpdateUser(oUser); } public DTO_TB_DEPARTMENT AddDepartment(DTO_TB_DEPARTMENT oDept) { return oService.AddDepartment(oDept); } public bool DeleteDepartment(DTO_TB_DEPARTMENT oDept) { return oService.DeleteDepartment(oDept); } public bool UpdateDepartment(DTO_TB_DEPARTMENT oDept) { return oService.UpdateDepartment(oDept); } public bool DeleteDepartment(Expressionbool>> selector = null) { if (selector == null) { return false; } ExpressionConverter expressionConverter = new ExpressionConverter(); ExpressionNode expressionNode = expressionConverter.Convert(selector); return oService.DeleteDeptByLamada(expressionNode); } }
public class CreatePowerManagerService { private static ServiceReference_PowerManager.PowerManageWCFServiceClient oPowerManagerClient = null; private static object obj = new object(); public static ServiceReference_PowerManager.PowerManageWCFServiceClient GetInstance() { lock (obj) { if (oPowerManagerClient == null) { oPowerManagerClient = new ServiceReference_PowerManager.PowerManageWCFServiceClient(); } } return oPowerManagerClient; } }
由于是采用的添加服务引用的方式引用的WCF服务,所以在这一层需要添加WCF服务的引用。在实现这部分代码的时候博主遇到过一个问题,在此和朋友们分享一下。由于在WCF服务的设计里面用到了DTO对象,而在ESTM.Web.BLL这个项目里面也要用到DTO,但是添加WCF服务引用的时候默认的是WCF服务里面的DTO,而不是ESTM.Common.DtoModel这个项目的DTO对象,这样就有问题了,每次如果我们需要改动下dto的内容,那么我们就需要更新下服务引用。还好,微软给我们选择的机制,我们来看图
这样就能解决上面的问题了。
2.3 ESTM.Web代码
按照面向接口的机制,ESTM.Web项目是不需要添加ESTM.Web.BLL这个实现层项目引用的,通过MEF动态导入ESTM.Web.BLL里面的对象。我们来看代码:
public class PowerManagerController : BaseController { [Import] private IPowerManager PowerManager { set; get; } #region Views // GET: PowerManager public ActionResult User() { return View(); } public ActionResult Role() { return View(); } public ActionResult Menu() { return View(); } public ActionResult Department() { return View(); } #endregion #region 部门管理 public JsonResult GetDepartments(int limit, int offset, string departmentname, string statu) { //得到lamada表达式 var oLamadaExtention = new LamadaExtention(); if (!string.IsNullOrEmpty(departmentname)) { oLamadaExtention.GetExpression("DEPARTMENT_NAME", departmentname, ExpressionType.Contains); } if (!string.IsNullOrEmpty(statu)) { oLamadaExtention.GetExpression("STATUS", statu, ExpressionType.Contains); } var lamada = oLamadaExtention.GetLambda(); var lstRes = PowerManager.GetDepartments(lamada); return Json(new { rows = lstRes.Skip(offset).Take(limit).ToList(), total = lstRes.Count }, JsonRequestBehavior.AllowGet); } public object GetDepartmentEdit(string strPostData) { var oDepartment = Newtonsoft.Json.JsonConvert.DeserializeObject(strPostData); if (string.IsNullOrEmpty(oDepartment.DEPARTMENT_ID)) { oDepartment.DEPARTMENT_ID = Guid.NewGuid().ToString(); oDepartment = PowerManager.AddDepartment(oDepartment); } else { PowerManager.UpdateDepartment(oDepartment); } return oDepartment; } public object DeleteDept(string strID) { PowerManager.DeleteDepartment(x=>x.DEPARTMENT_ID == strID); return new object(); } #endregion #region 菜单管理 public JsonResult GetMenus(int limit, int offset, string menuname, string menuurl) { var oLamadaExtention = new LamadaExtention(); if (!string.IsNullOrEmpty(menuname)) { oLamadaExtention.GetExpression("MENU_NAME", menuname, ExpressionType.Contains); } if (!string.IsNullOrEmpty(menuurl)) { oLamadaExtention.GetExpression("MENU_URL", menuurl, ExpressionType.Contains); } var lamada = oLamadaExtention.GetLambda(); var lstRes = PowerManager.GetMenus(lamada).ToList(); return Json(new { rows = lstRes.Skip(offset).Take(limit).ToList(), total = lstRes.Count }, JsonRequestBehavior.AllowGet); } public object GetMenuEdit(string strPostData) { var oMenu = Newtonsoft.Json.JsonConvert.DeserializeObject(strPostData); if (string.IsNullOrEmpty(oMenu.MENU_ID)) { //oMenu = MenuManager.Add(oMenu); } else { //MenuManager.Update(oMenu); } return oMenu; } public object DeleteMenu(string strID) { //MenuManager.Delete(strID); return new object(); } public object GetParentMenu() { var lstMenu = PowerManager.GetMenus(x => x.MENU_LEVEL == "1"); //var lstRes = RoleManager.Find().ToList(); //var oRes = new PageRowData(); //oRes.rows = lstRes.Skip(offset).Take(limit).ToList(); //oRes.total = lstRes.Count; return lstMenu; ; } public object GetChildrenMenu(string strParentID) { var lstMenu = PowerManager.GetMenus(x => x.MENU_LEVEL == "2" & x.PARENT_ID == strParentID).ToList(); //var lstRes = RoleManager.Find().ToList(); //var oRes = new PageRowData(); //oRes.rows = lstRes.Skip(offset).Take(limit).ToList(); //oRes.total = lstRes.Count; return lstMenu; ; } #endregion #region 权限管理 public JsonResult GetRole(int limit, int offset, string rolename, string desc) { var oLamadaExtention = new LamadaExtention(); if (!string.IsNullOrEmpty(rolename)) { oLamadaExtention.GetExpression("ROLE_NAME", rolename, ExpressionType.Contains); } if (!string.IsNullOrEmpty(desc)) { oLamadaExtention.GetExpression("DESCRIPTION", desc, ExpressionType.Contains); } var lamada = oLamadaExtention.GetLambda(); var lstRes = PowerManager.GetRoles(lamada).ToList(); return Json(new { rows = lstRes.Skip(offset).Take(limit).ToList(), total = lstRes.Count }, JsonRequestBehavior.AllowGet); } #endregion #region 用户管理 public JsonResult GetUsers(int limit, int offset, string username, string fullname) { var oLamadaExtention = new LamadaExtention(); if (!string.IsNullOrEmpty(username)) { oLamadaExtention.GetExpression("USER_NAME", username, ExpressionType.Contains); } if (!string.IsNullOrEmpty(fullname)) { oLamadaExtention.GetExpression("FULLNAME", fullname, ExpressionType.Contains); } var lamada = oLamadaExtention.GetLambda(); var lstRes = PowerManager.GetUsers(lamada).ToList(); return Json(new { rows = lstRes.Skip(offset).Take(limit).ToList(), total = lstRes.Count }, JsonRequestBehavior.AllowGet); } public object GetUserEdit(string strPostData) { var oUser = Newtonsoft.Json.JsonConvert.DeserializeObject(strPostData); if (string.IsNullOrEmpty(oUser.USER_ID)) { oUser.USER_ID = Guid.NewGuid().ToString(); oUser = PowerManager.AddUser(oUser); } else { PowerManager.UpdateUser(oUser); } return oUser; } public object DeleteUser(string strID) { PowerManager.DeleteUser(x => x.USER_ID == strID); return new object(); } #endregion }
View页面
@ViewBag.Title @Styles.Render("~/Content/css") @Styles.Render("~/Content/table-css") @Scripts.Render("~/bundles/jquery") @Scripts.Render("~/bundles/bootstrap") @Scripts.Render("~/bundles/bootstrap-table") @RenderSection("Scripts", false) @RenderBody()
@{ ViewBag.Title = "部门管理"; Layout = "~/Views/Shared/_Layout.cshtml";}@Scripts.Render("~/bundles/PowerManage/DepartmentManage")查询条件
JS代码我们来看一个页面就好了,其他页面类似:
$(function () { $('#tb_departments').bootstrapTable({ url: '/PowerManager/GetDepartments', method: 'post', toolbar: '#toolbar', pagination: true, queryParams: queryParams, queryParamsType: "limit", //ajaxOptions: { departmentname: "", statu: "" }, sidePagination: "server", pageSize: 5, pageList: [5, 25, 50, 100], search: true, strictSearch: true, showColumns: true, showRefresh: true, minimumCountColumns: 2, clickToSelect: true, columns: [{ checkbox: true }, { field: 'DEPARTMENT_NAME', title: '部门名称' }, { field: 'PARENT_ID', title: '上级部门' }, { field: 'DEPARTMENT_LEVEL', title: '部门级别' }, { field: 'STATUS', title: '状态' }, ], onLoadSuccess: function (data) { var odata = data; } }); var oButtonInit = new ButtonInit(); oButtonInit.Init();});function queryParams(params) { //配置参数 var temp = { //这里的键的名字和控制器的变量名必须一直,这边改动,控制器也需要改成一样的 limit: params.limit, //页面大小 offset: params.offset, //页码 departmentname: $("#txt_search_departmentname").val(), statu: $("#txt_search_statu").val() }; return temp;}var ButtonInit = function () { var oInit = new Object(); var postdata = {}; oInit.Init = function () { $("#btn_add").click(function () { $("#myModalLabel").text("新增"); $("#myModal").find(".form-control").val(""); $('#myModal').modal() postdata.DEPARTMENT_ID = ""; }); $("#btn_edit").click(function () { var arrselections = $("#tb_departments").bootstrapTable('getSelections'); if (arrselections.length > 1) { //alert("只能选择一行进行编辑"); $("#btn_alert").alert(); return; } if (arrselections.length效果图:
在做页面数据更新的时候,博主又遇到一个问题:ObjectStateManager 中已存在具有同一键的对象。ObjectStateManager 无法跟踪具有相同键的多个对象。在此还是记录下解决方案:
在仓储的公共实现类中将
public virtual IQueryable Entities { get { return UnitOfWork.context.Set(); } }改成
public virtual IQueryable Entities{ get { return UnitOfWork.context.Set().AsNoTracking() as IQueryable; }}就可以了。
至此,从领域模型到Web前端的代码基本完成,可能很多代码并未完善,比如异常处理、数据验证等。
DDD领域驱动设计初探系列文章:
- 《DDD领域驱动设计初探(1):聚合》
- 《DDD领域驱动设计初探(2):仓储Repository(上)》
- 《DDD领域驱动设计初探(3):仓储Repository(下)》
- 《DDD领域驱动设计初探(4):WCF搭建》
- 《DDD领域驱动设计初探(5):AutoMapper使用》
- 《DDD领域驱动设计初探(6):领域服务》