随着技术的进步，跨平台开发已经成为了标配，在此大背景下，ASP.NET Core也应运而生。本文主要基于ASP.NET Core+Element+Sql Server开发一个校园图书管理系统为例，简述基于MVC三层架构开发的常见知识点，前两篇文章简单介绍了如何搭建开发框架，登录功能以及主页面功能的实现，本篇文章继续讲解书室以及书架相关功能的开发，仅供学习分享使用，如有不足之处，还请指正。涉及知识点
在本示例中，应用最多的就是如何Element中提供的组件，和控制器中业务逻辑处理，涉及知识点如下所示：- MVC 是一种使用 MVC（Model View Controller 模型-视图-控制器）设计创建 Web 应用程序的模式，其中Controller（控制器）处理输入（写入数据库记录）。控制器Controller，是应用程序中处理用户交互的部分，通常控制器负责从视图读取数据，控制用户输入，并向模型发送数据。
- Element组件库，一套为开发者、设计师和产品经理准备的基于 Vue 2.0 的桌面端组件库。可以大大提高开发效率，减少工作量。在主页面中，主要用到如下几种：
- 表单控件el-form，由输入框、选择器、单选框、多选框等控件组成，用以收集、校验、提交数据到后台。
- 列表控件el-table，用于展示多条结构类似的数据，可对数据进行排序、筛选、对比或其他自定义操作。主要用户显示结构化列表的数据。
- 分页控件el-pagination，当数据量过多时，使用分页分解数据。
- 弹出窗口el-dialog，在保留当前页面状态的情况下，告知用户并承载相关操作。主要用于弹出新建或编辑窗口。
- axios组件，是一个基于promise 的网络请求库，axios本质上也是对原生XHR的封装，只不过它是Promise的实现版本，符合最新的ES规范。在本示例中，所有的前后端交互，均是通过axios库。
功能介绍
书室管理和书架管理，主要用于管理书籍的存放位置，及对书室和书架的CRUD(增删改查)等基本操作。每一个书室都有很多书架，并根据分类存放不同书籍，所以书室ID是书架ID的外键。两者之间存在对应关系。下面逐一进行介绍。书室管理
书室管理就是对书室数据表的增删改查操作，相对比较独立，操作起来也比较简单。1. 书室数据表结构书室表主要包括Id(唯一标识),Name(图书馆名称),SubName(书室名称),Location(位置),Manager(管理员)等几个字段，具体如下所示2. 书室数据表实体类数据表实体类和数据表一一对应，主要通过EntityFrameword与数据库进行映射。如下所示：namespace CLMS.Entity{ /// <summary> /// 图书馆实体 /// </summary> public class LibraryEntity { /// <summary> /// 唯一标识 /// </summary> public int Id { get; set; }
/// <summary> /// 图书馆名称 /// </summary> public string? Name { get; set; }
/// <summary> /// 图书室名称 /// </summary> public string? SubName { get; set; }
/// <summary> /// 位置 /// </summary> public string? Location { get; set; }
/// <summary> /// 管理员 /// </summary> public string? Manager { get; set; }
/// <summary> /// 创建时间 /// </summary> public DateTime CreateTime { get; set; }
/// <summary> /// 当前登录的账号的ID /// </summary> public int CreateUser { get; set; }
/// <summary> /// 最后编辑时间 /// </summary> public DateTime LastEditTime { get; set; }
/// <summary> /// 最后修改人 /// </summary> public int LastEditUser { get; set; } }}
3. 书室页面布局书室管理，主要用户查询，新增，修改，删除书室等基本操作，页面布局源码如下所示：<div id="app"> <template> <el-breadcrumb separator-class="el-icon-arrow-right"> <el-breadcrumb-item>书室管理</el-breadcrumb-item> <el-breadcrumb-item>书室管理</el-breadcrumb-item> </el-breadcrumb> <el-form :inline="true" :model="queryCondition" class="demo-form-inline" style="margin-top: 10px; border: solid;border-width: 1px;border-color: #ebeef5;padding: 10px;"> <el-form-item label="图书馆名称"> <el-input v-model="queryCondition.Name" placeholder="图书馆名称"></el-input> </el-form-item> <el-form-item label="书室名称"> <el-input v-model="queryCondition.SubName" placeholder="书室名称"></el-input> </el-form-item> <el-form-item> <el-button type="primary" v-on:click="handleQuery">查询</el-button> </el-form-item> <el-form-item> <el-button type="primary" v-on:click="handleAdd">新增</el-button> </el-form-item> </el-form>
<el-table :data="tableData" style="width: 100%" border> <el-table-column prop="Name" label="图书馆名称" sortable></el-table-column> <el-table-column prop="SubName" label="书室名称" sortable></el-table-column> <el-table-column prop="Location" label="位置" sortable></el-table-column> <el-table-column prop="Manager" label="管理员" sortable></el-table-column> <el-table-column prop="CreateTime" label="创建时间" sortable min-width="120"></el-table-column> <el-table-column label="操作"> <template slot-scope="scope"> <el-button size="medium" type="primary" plain v-on:click="handleEdit(scope.$index,scope.row)">编辑</el-button> <el-button size="medium" type="danger" v-on:click="handleDelete(scope.$index,scope.row)">删除</el-button> </template> </el-table-column> </el-table> <el-pagination background layout="prev, pager, next" :page-size="pageSize" :current-page="currentPage" :total="total" style="margin-top:10px;" v-on:current-change="handlePageChanged" v-on:prev-click="handlePrevClick" v-on:next-click="handleNextClick"></el-pagination> <el-dialog title="书室信息" :visible.sync="dialogFormVisible"> <el-form :model="addOrEditForm"> <el-form-item label="图书馆名称" :label-width="formLabelWidth"> <el-input v-model="addOrEditForm.Name" autocomplete="off"></el-input> </el-form-item> <el-form-item label="书室名称" :label-width="formLabelWidth"> <el-input v-model="addOrEditForm.SubName" autocomplete="off"></el-input> </el-form-item> <el-form-item label="位置" :label-width="formLabelWidth"> <el-input v-model="addOrEditForm.Location" autocomplete="off"></el-input> </el-form-item> <el-form-item label="管理员" :label-width="formLabelWidth"> <el-input v-model="addOrEditForm.Manager" autocomplete="off"></el-input> </el-form-item> </el-form> <div slot="footer" class="dialog-footer"> <el-button v-on:click="dialogFormVisible = false">取 消</el-button> <el-button type="primary" v-on:click="handleSave">确 定</el-button> </div> </el-dialog> </template></div>
4. 书室页面数据交互数据交互通过JS脚本进行，书写格式和VUE2.0保持一致，在页面启动时，加载所有的书室信息，并绑定到el-table对象，所以需要在mounted函数中增加调用向服务器端发出请求，当用户新增或编辑保存时，通过axios发送请求到服务端接口。<script> var app= new Vue({ el: '#app', data:function() { return { queryCondition:{ Name: '', SubName: '', }, formLabelWidth: '120px', addOrEditForm:{ ID:0, Name: '', SubName: '', Location:'', Manager:'' }, total:0, pageSize:20, currentPage:1, dialogFormVisible: false, tableData: [] } }, mounted:function(){ this.query(1); }, methods: { handleOpen(key, keyPath) { console.log(key, keyPath); }, handleClose(key, keyPath) { console.log(key, keyPath); }, formatter(row, column) { return row.address; }, handleQuery(){ this.query(1); console.log("query"); }, handlePageChanged(val){ this.query(val); }, handlePrevClick(val){ //this.query(this.currentPage); }, handleNextClick(val){ //this.query(this.currentPage); }, handleEdit(index,row){ console.log("当前index="+index); console.log(row); this.addOrEditForm.Id=row.Id; this.addOrEditForm.Name=row.Name; this.addOrEditForm.SubName=row.SubName; this.addOrEditForm.Location=row.Location; this.addOrEditForm.Manager=row.Manager; this.dialogFormVisible=true; }, handleDelete(index,row){ console.log("当前index="+index); console.log(row); this.$confirm('确定要删除编号为'+row.Id+'的书室吗?', '提示', { confirmButtonText: '确定', cancelButtonText: '取消', type: 'warning' }).then(() => { var that=this; axios.post('/Library/Delete', { Id:row.Id }).then(function (response) { if(response.status==200){ var msg = response.data; console.log(msg); if(msg.code=="0"){ //刷新页面 that.$message({ type: 'success', message: '删除成功!' }); that.query(1); }else{ that.$message.error(msg.message); } } console.log(response); }).catch(function (error) { that.$message.error(error); }); console.log("delete"); }).catch(() => { this.$message({ type: 'info', message: '已取消删除' }); }); }, handleAdd(){ this.addOrEditForm.Id=0; this.addOrEditForm.Name=''; this.addOrEditForm.SubName=''; this.addOrEditForm.Location=''; this.addOrEditForm.Manager=''; this.dialogFormVisible=true; console.log("add"); }, handleSave(){ var that=this; axios.post('/Library/Add', { Id:this.addOrEditForm.Id, Name:this.addOrEditForm.Name, SubName:this.addOrEditForm.SubName, Location:this.addOrEditForm.Location, Manager:this.addOrEditForm.Manager }).then(function (response) { if(response.status==200){ var msg = response.data; console.log(msg); if(msg.code=="0"){ that.dialogFormVisible=false; //刷新页面 that.query(1); }else{ window.alert(msg.message); } console.log(that.dialogFormVisible); } console.log(response); }).catch(function (error) { console.log(error); }); console.log("save"); }, query(pageNum){ var that = this; this.tableData=[]; console.log("query"); axios.get('/Library/Query',{params: { Name:this.queryCondition.Name, SubName:this.queryCondition.SubName, PageSize:this.pageSize, PageNum:pageNum }}).then(function (response) { if(response.status==200){ var data = response.data; var count=data.count; that.total = count; for (let i = 0; i < data.items.length; i++) { that.tableData.push({ Id: data.items[i].id, Name: data.items[i].name, SubName: data.items[i].subName, Location: data.items[i].location, Manager:data.items[i].manager, CreateTime: data.items[i].createTime, }); } } console.log(that.tableData); console.log(response); }).catch(function (error) { console.log(error); }); } } });</script>
5. 书室控制器逻辑LibraryController控制器主要用于响应用户的请求，与数据库交互，并返回执行的结果信息。namespace CLMS.Host.Controllers{ public class LibraryController : Controller { private DataContext dataContext;
public LibraryController(DataContext context) { dataContext = context; }
public IActionResult Index() { return View(); }
/// <summary> /// 获取符合条件的查询 /// </summary> /// <param name="Name"></param> /// <param name="Publisher"></param> /// <param name="pageNum"></param> /// <param name="pageSize"></param> /// <returns></returns> [HttpGet] public PagedRequest<Library> Query(string Name, string SubName, int pageNum, int pageSize) { Name = string.IsNullOrEmpty(Name) ? string.Empty : Name; SubName = string.IsNullOrEmpty( SubName) ? string.Empty:SubName;
var entities = dataContext.Librarys.Where(r => r.Name.Contains(Name) && r.SubName.Contains(SubName)); var total = entities.Count(); var dtos = entities.Skip((pageNum - 1) * pageSize).Take(pageSize).Select(r => new Library() { Id = r.Id, Name = r.Name, SubName=r.SubName,Location=r.Location,Manager=r.Manager, CreateTime = r.CreateTime }).ToList(); return new PagedRequest<Library>() { count = total, items = dtos, }; }
/// <summary> /// 查询所有信息 /// </summary> /// <returns></returns> [HttpGet] public List<Library> QueryAll() { var dtos = dataContext.Librarys.Select(r=> new Library() { Id = r.Id, Name = r.Name, SubName = r.SubName}).ToList(); return dtos; }
[Consumes("application/json")] [HttpPost] public Msg Add([FromBody] Library library) { Msg msg = new Msg(); if (library == null) { msg.code = 1; msg.message = "对象为空"; return msg; } else { var userId= HttpContext.Session.GetInt32("UserId");
if (library.Id > 0) { //更新 var entity = dataContext.Librarys.Where(r => r.Id == library.Id).FirstOrDefault(); if (entity != null) { entity.Name = library.Name; entity.SubName = library.SubName; entity.Location = library.Location; entity.Manager= library.Manager; entity.LastEditUser = userId.GetValueOrDefault(); entity.LastEditTime = DateTime.Now; dataContext.Librarys.Update(entity); dataContext.SaveChanges(); } else { msg.code = 1; msg.message = "修改失败"; return msg; } } else { //新增 var entity = new LibraryEntity() { Id = library.Id, Name = library.Name, SubName = library.SubName, Location = library.Location, Manager = library.Manager, CreateTime = DateTime.Now, CreateUser = userId.GetValueOrDefault(), LastEditTime = DateTime.Now, LastEditUser = userId.GetValueOrDefault(), }; dataContext.Librarys.Add(entity); dataContext.SaveChanges(); } msg.code = 0; msg.message = "success"; return msg; } }
[Consumes("application/json")] [HttpPost] public Msg Delete([FromBody] Library library) { Msg msg = new Msg(); if (library == null) { msg.code = 1; msg.message = "对象为空"; return msg; } else { if (library.Id > 0) { var entity = dataContext.Librarys.Where(r => r.Id == library.Id).FirstOrDefault(); if (entity != null) { dataContext.Librarys.Remove(entity); dataContext.SaveChanges(); msg.code = 0; msg.message = "success"; } else { msg.code = 1; msg.message = "对象不存在或已被删除"; } } else {
msg.code = 1; msg.message = "对象Id小于0"; } return msg; } } }}
6. 书室功能运行测试经过以上几个步骤，即可完成书室管理的基本操作，主要包括书室的查询，新增，编辑，删除，已经分页等功能，如下所示：书架管理
书架管理是在书室管理的基础之上，进步细化书架的具体位置，方便用户查找书籍。1. 书架数据表结构书架表主要包括Id(唯一标识)，LibraryId(书室表的唯一标识)，Row(行)，Column(排)等几个字段。如下所示：2. 书架数据表实体类数据表实体类和数据表一一对应，主要通过EntityFrameword与数据库进行映射。如下所示：namespace CLMS.Entity{ /// <summary> /// 阅览架 /// </summary> public class BookRackEntity { /// <summary> /// 唯一标识 /// </summary> public int Id { get; set; }
/// <summary> /// 图书室ID /// </summary> public int LibraryId { get; set; }
/// <summary> /// 排 /// </summary> public int Row { get; set; }
/// <summary> /// 列 /// </summary> public int Column { get; set; }
/// <summary> /// 描述 /// </summary> public string Description { get; set; }
/// <summary> /// 创建时间 /// </summary> public DateTime CreateTime { get; set; }
/// <summary> /// 当前登录的账号的ID /// </summary> public int CreateUser { get; set; }
/// <summary> /// 最后编辑时间 /// </summary> public DateTime LastEditTime { get; set; }
/// <summary> /// 最后修改人 /// </summary> public int LastEditUser { get; set; } }}
3. 书架页面布局书架管理需要关系书室信息，即哪一个书室的第几行，第几列，以下拉框的形式呈现。如下所示：<div id="app"> <template> <el-breadcrumb separator-class="el-icon-arrow-right"> <el-breadcrumb-item>书室管理</el-breadcrumb-item> <el-breadcrumb-item>书架管理</el-breadcrumb-item> </el-breadcrumb> <el-form :inline="true" :model="queryCondition" class="demo-form-inline" style="margin-top: 10px; border: solid;border-width: 1px;border-color: #ebeef5;padding: 10px;"> <el-form-item label="图书馆"> <el-input v-model="queryCondition.Name" placeholder="图书馆"></el-input> </el-form-item> <el-form-item label="书室"> <el-input v-model="queryCondition.SubName" placeholder="书室"></el-input> </el-form-item> <el-form-item> <el-button type="primary" v-on:click="handleQuery">查询</el-button> </el-form-item> <el-form-item> <el-button type="primary" v-on:click="handleAdd">新增</el-button> </el-form-item> </el-form>
<el-table :data="tableData" style="width: 100%" border :default-sort="{prop: 'date', order: 'descending'}"> <el-table-column prop="Name" label="图书馆" sortable ></el-table-column> <el-table-column prop="SubName" label="图书室" sortable ></el-table-column> <el-table-column prop="Row" label="排" sortable ></el-table-column> <el-table-column prop="Column" label="列" sortable ></el-table-column> <el-table-column prop="Description" label="描述" sortable ></el-table-column> <el-table-column prop="CreateTime" label="创建时间" sortable min-width="120"></el-table-column> <el-table-column label="操作"> <template slot-scope="scope"> <el-button size="medium" type="primary" plain v-on:click="handleEdit(scope.$index,scope.row)">编辑</el-button> <el-button size="medium" type="danger" v-on:click="handleDelete(scope.$index,scope.row)">删除</el-button> </template> </el-table-column> </el-table> <el-pagination background layout="prev, pager, next" :page-size="pageSize" :current-page="currentPage" :total="total" style="margin-top:10px;" v-on:current-change="handlePageChanged" v-on:prev-click="handlePrevClick" v-on:next-click="handleNextClick"></el-pagination> <el-dialog title="书架信息" :visible.sync="dialogFormVisible"> <el-form :model="addOrEditForm"> <el-form-item label="书室名称" :label-width="formLabelWidth"> <el-select v-model="addOrEditForm.libraryId" clearable placeholder="请选择"> <el-option v-for="item in librarys" :key="item.Id" :label="item.Label" :value="item.Id"> </el-option> </el-select> </el-form-item> <el-form-item label="排" :label-width="formLabelWidth"> <el-input v-model="addOrEditForm.Row" autocomplete="off"></el-input> </el-form-item> <el-form-item label="列" :label-width="formLabelWidth"> <el-input v-model="addOrEditForm.Column" autocomplete="off"></el-input> </el-form-item> <el-form-item label="描述" :label-width="formLabelWidth"> <el-input v-model="addOrEditForm.Description" autocomplete="off"></el-input> </el-form-item> </el-form> <div slot="footer" class="dialog-footer"> <el-button v-on:click="dialogFormVisible = false">取 消</el-button> <el-button type="primary" v-on:click="handleSave">确 定</el-button> </div> </el-dialog> </template></div>
4. 书架数据交互数据交互通过JS脚本进行，书写格式和VUE2.0保持一致，在页面启动时，加载所有的书架信息，并绑定到el-table对象，所以需要在mounted函数中增加调用向服务器端发出请求，当用户新增或编辑保存时，通过axios发送请求到服务端接口。<script> var app= new Vue({ el: '#app', data:function() { return { queryCondition:{ Name: '', SubName: '', }, addOrEditForm:{ Id:0, libraryId:'', Row: '', Column: '', Description:'', }, formLabelWidth: '120px', tableData: [], librarys:[], total:0, pageSize:10, currentPage:1, dialogFormVisible: false, } }, mounted:function(){ this.query(1); }, methods: { handleOpen(key, keyPath) { console.log(key, keyPath); }, handleClose(key, keyPath) { console.log(key, keyPath); }, formatter(row, column) { return row.address; }, handleQuery(){ this.query(1); console.log("query"); }, handlePageChanged(val){ this.query(val); }, handlePrevClick(val){ //this.query(val); }, handleNextClick(val){ //this.query(val); }, handleEdit(index,row){ var that=this; that.librarys=[]; that.addOrEditForm.Id=0; axios.get('/Library/QueryAll',{params: {}}).then(function (response) { if(response.status==200){ var data = response.data; for (let i = 0; i < data.length; i++) { that.librarys.push({ Id: data[i].id, Label: data[i].name+'-'+data[i].subName }); } that.dialogFormVisible=true; } console.log(that.librarys); console.log(response); }).catch(function (error) { console.log(error); }); console.log("当前index="+index); console.log(row); this.addOrEditForm.Id=row.Id; this.addOrEditForm.libraryId=row.libraryId; this.addOrEditForm.Row=row.Row; this.addOrEditForm.Column=row.Column; this.addOrEditForm.Description=row.Description; this.dialogFormVisible=true; }, handleDelete(index,row){ console.log("当前index="+index); console.log(row); this.$confirm('确定要删除编号为'+row.Id+'的书架吗?', '提示', { confirmButtonText: '确定', cancelButtonText: '取消', type: 'warning' }).then(() => { var that=this; axios.post('/BookRack/Delete', { Id:row.Id }).then(function (response) { if(response.status==200){ var msg = response.data; console.log(msg); if(msg.code=="0"){ //刷新页面 that.$message({ type: 'success', message: '删除成功!' }); that.query(1); }else{ that.$message.error(msg.message); } } console.log(response); }).catch(function (error) { that.$message.error(error); }); console.log("delete"); }).catch(() => { this.$message({ type: 'info', message: '已取消删除' }); }); }, handleAdd(){ var that=this; that.librarys=[]; that.addOrEditForm.Id=0; that.addOrEditForm.libraryId=''; that.addOrEditForm.Row= ''; that.addOrEditForm.Column= ''; that.addOrEditForm.Description=''; axios.get('/Library/QueryAll',{params: {}}).then(function (response) { if(response.status==200){ var data = response.data; for (let i = 0; i < data.length; i++) { that.librarys.push({ Id: data[i].id, Label: data[i].name+'-'+data[i].subName }); } that.dialogFormVisible=true; } console.log(that.librarys); console.log(response); }).catch(function (error) { console.log(error); });
console.log("add"); }, handleSave(){ var that=this; axios.post('/BookRack/Add', { Id:this.addOrEditForm.Id, LibraryId:this.addOrEditForm.libraryId, Row:this.addOrEditForm.Row, Column:this.addOrEditForm.Column, Description:this.addOrEditForm.Description, }).then(function (response) { if(response.status==200){ var msg = response.data; console.log(msg); if(msg.code=="0"){ that.dialogFormVisible=false; //刷新页面 that.query(1); }else{ window.alert(msg.message); } console.log(that.dialogFormVisible); } console.log(response); }).catch(function (error) { console.log(error); }); console.log("save"); }, query(pageNum){ var that = this; this.tableData=[]; console.log("query"); axios.get('/BookRack/Query',{params: { Name:this.queryCondition.Name, SubName:this.queryCondition.SubName, PageSize:this.pageSize, PageNum:pageNum }}).then(function (response) { if(response.status==200){ var data = response.data; var count=data.count; that.total = count; for (let i = 0; i < data.items.length; i++) { that.tableData.push({ Id: data.items[i].id, libraryId:data.items[i].libraryId, Name: data.items[i].name, SubName: data.items[i].subName, Row : data.items[i].row, Column : data.items[i].column, Location : data.items[i].location, Description:data.items[i].description, CreateTime: data.items[i].createTime, }); } } console.log(that.tableData); console.log(response); }).catch(function (error) { console.log(error); }); } } });</script>
5. 书架控制器逻辑BookRackController控制器主要用于响应用户的请求，与数据库交互，并返回执行的结果信息。namespace CLMS.Host.Controllers{ public class BookRackController : Controller { private DataContext dataContext;
public BookRackController(DataContext context) { dataContext = context; }
public IActionResult Index() { return View(); }
/// <summary> /// 获取符合条件的查询 /// </summary> /// <param name="Name"></param> /// <param name="Publisher"></param> /// <param name="pageNum"></param> /// <param name="pageSize"></param> /// <returns></returns> [HttpGet] public PagedRequest<BookRack> Query(string Name, string SubName, int pageNum, int pageSize) { Name = string.IsNullOrEmpty(Name) ? string.Empty : Name; SubName = string.IsNullOrEmpty(SubName) ? string.Empty : SubName;
var entities = dataContext.Librarys.Where(r => r.Name.Contains(Name) && r.SubName.Contains(SubName)).Join(dataContext.BookRacks,l=>l.Id,b=>b.LibraryId,(l,b) =>new BookRack() {Name=l.Name,SubName=l.SubName,Location=l.Location,LibraryId=b.LibraryId,Id=b.Id,Row=b.Row,Column=b.Column,Description=b.Description,CreateTime=b.CreateTime }); var total = entities.Count(); var dtos = entities.Skip((pageNum - 1) * pageSize).Take(pageSize).ToList(); return new PagedRequest<BookRack>() { count = total, items = dtos, }; }
[Consumes("application/json")] [HttpPost] public Msg Add([FromBody] BookRack bookRack) { Msg msg = new Msg(); if (bookRack == null) { msg.code = 1; msg.message = "对象为空"; return msg; } else { var userId = HttpContext.Session.GetInt32("UserId");
if (bookRack.Id > 0) { //更新 var entity = dataContext.BookRacks.Where(r => r.Id == bookRack.Id).FirstOrDefault(); if (entity != null) { entity.LibraryId = bookRack.LibraryId; entity.Row = bookRack.Row; entity.Column = bookRack.Column; entity.Description = bookRack.Description; entity.LastEditUser = userId.GetValueOrDefault(); entity.LastEditTime = DateTime.Now; dataContext.BookRacks.Update(entity); dataContext.SaveChanges(); } else { msg.code = 1; msg.message = "修改失败"; return msg; } } else { //新增 var entity = new BookRackEntity() { Id = bookRack.Id, LibraryId = bookRack.LibraryId, Row = bookRack.Row, Column = bookRack.Column, Description = bookRack.Description, CreateTime = DateTime.Now, CreateUser = userId.GetValueOrDefault(), LastEditTime = DateTime.Now, LastEditUser = userId.GetValueOrDefault(), }; dataContext.BookRacks.Add(entity); dataContext.SaveChanges(); } msg.code = 0; msg.message = "success"; return msg; } }
[Consumes("application/json")] [HttpPost] public Msg Delete([FromBody] BookRack bookRack) { Msg msg = new Msg(); if (bookRack == null) { msg.code = 1; msg.message = "对象为空"; return msg; } else { if (bookRack.Id > 0) { var entity = dataContext.BookRacks.Where(r => r.Id == bookRack.Id).FirstOrDefault(); if (entity != null) { dataContext.BookRacks.Remove(entity); dataContext.SaveChanges(); msg.code = 0; msg.message = "success"; } else { msg.code = 1; msg.message = "对象不存在或已被删除"; } } else {
msg.code = 1; msg.message = "对象Id小于0"; } return msg; } } }}
6. 运行测试经过以上几个步骤，即可完成书架管理的基本操作，主要包括书架的查询，新增，编辑，删除，已经分页等功能，如下所示：以上就是校园图书管理系统的书室管理及书架管理功能实现，功能正在开发完善中，后续功能再继续介绍。旨在抛砖引玉，一起学习，共同进步。
学习编程，从关注【老码识途】开始！！！ 
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