ABP进阶教程1 - 条件查询

点这里进入ABP进阶教程目录

添加实体

打开领域层(即JD.CRS.Core)的Entitys目录 //用以存放实体对象
添加一个枚举StatusCode.cs //状态信息

 using System;
 using System.Collections.Generic;
 using System.Text;

 namespace JD.CRS.Entitys
 {
     public enum StatusCode : byte
     {
         Enabled = ,
         Disabled =
     }
 }

添加数据传输对象

打开应用层(即JD.CRS.Application)的Course\Dto目录 //用以存放Course相关数据传输对象

添加一个Dto GetAllCoursesInput.cs

 using Abp.Application.Services.Dto;
 using JD.CRS.Entitys;

 namespace JD.CRS.Course.Dto
 {
     public class GetAllCoursesInput: PagedResultRequestDto
     {
         public StatusCode? Status { get; set; }
     }
 }

更新应用服务

打开应用层(即JD.CRS.Application)的Course\CourseAppService.cs //Course应用服务

重写GetAll方法 //按状态查询Course

 public override async Task<PagedResultDto<CourseDto>> GetAll(GetAllCoursesInput input)
 {
     var query = base.CreateFilteredQuery(input).WhereIf(input.Status.HasValue, t => t.Status == input.Status.Value);
     var coursecount = query.Count();
     var courselist = query.ToList();
     return new PagedResultDto<CourseDto>()
     {
         TotalCount = coursecount,
         Items = ObjectMapper.Map<List<CourseDto>>(courselist)
     };
 }

更新模型

打开展示层(即JD.CRS.Web.Mvc)的Models/Course/CourseListViewModel.cs //Course查询视图模型

新增GetStatusList方法 //获取状态列表

 public StatusCode? SelectedStatus { get; set; }

 public List<SelectListItem> GetStatusList(ILocalizationManager localizationManager)
 {
     var list = new List<SelectListItem>
     {
         new SelectListItem
         {
             Text = localizationManager.GetString(CRSConsts.LocalizationSourceName, "All"),
             Value = "",
             Selected = SelectedStatus == null
         }
     };

     list.AddRange(Enum.GetValues(typeof(StatusCode))
         .Cast<StatusCode>()
         .Select(status =>
             new SelectListItem
             {
                 Text = localizationManager.GetString(CRSConsts.LocalizationSourceName, $"StatusCode_{status}"),
                 Value = status.ToString(),
                 Selected = status == SelectedStatus
             })
     );

更新控制器

打开展示层(即JD.CRS.Web.Mvc)的Controllers/CourseController.cs //Course控制器

更新Index方法 //按状态查询Course

 public async Task<ActionResult> Index(GetAllCoursesInput input)
 {
     IReadOnlyList<CourseDto> output = (await _courseAppService.GetAll(new GetAllCoursesInput { Status = input.Status })).Items;
     var model = new CourseListViewModel(output)
     {
         SelectedStatus = input.Status
     };
     return View(model);
 }

更新视图

打开展示层(即JD.CRS.Web.Mvc)的Views/Course/Index.cshtml //Course查询视图

插入查询条件 //按状态查询Course

 <div class="header">
     <table>
         <thead>
             <tr>
                 <th class="col-sm-1">@L("Status")</th>
                 <th class="col-sm-1">
                     @Html.DropDownListFor(
                     model => model.SelectedStatus,
                     Model.GetStatusList(LocalizationManager),
                     new
                     {
                         @class = "form-control",
                         id = "StatusCombobox"
                     })
                 </th>
                 <th class="col-sm-10"></th>
             </tr>
         </thead>
     </table>
 </div>

更新脚本

打开展示层(即JD.CRS.Web.Mvc)的\wwwroot\view-resources\Views\Course\Index.js //用以存放Course查询相关脚本

插入查询条件 //按状态查询Course

 var _$statusCombobox = $('#StatusCombobox');
 _$statusCombobox.change(function () {
     location.href = '/Course?status=' + _$statusCombobox.val();
 });

预览效果