ASP.NET Core+Element+SQL Server开发校园图书管理系统（三）

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：

书室功能新增或编辑页面

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;
            }
        }
    }
}