ABP進階教程1 - 條件查詢

點這里進入ABP進階教程目錄 

添加實體

打開領域層(即JD.CRS.Core)的Entitys目錄 //用以存放實體對象
添加一個枚舉StatusCode.cs //狀態信息

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

namespace JD.CRS.Entitys
{
    public enum StatusCode : byte
    {
        Enabled = 0,
        Disabled = 1
    }
}

添加數據傳輸對象 

打開應用層(即JD.CRS.Application)的Course\Dto目錄 //用以存放Course相關數據傳輸對象

添加一個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; }
    }
}

更新應用服務

打開應用層(即JD.CRS.Application)的Course\CourseAppService.cs //Course應用服務

重寫GetAll方法 //按狀態查詢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

打開展示層(即JD.CRS.Web.Mvc)的Models/Course/CourseListViewModel.cs //Course查詢視圖模型

新增GetStatusList方法 //獲取狀態列表

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

打開展示層(即JD.CRS.Web.Mvc)的Controllers/CourseController.cs //Course控制器

更新Index方法 //按狀態查詢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);
}

更新視圖

打開展示層(即JD.CRS.Web.Mvc)的Views/Course/Index.cshtml //Course查詢視圖

插入查詢條件 //按狀態查詢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>

更新腳本

打開展示層(即JD.CRS.Web.Mvc)的\wwwroot\view-resources\Views\Course\Index.js //用以存放Course查詢相關腳本

插入查詢條件 //按狀態查詢Course

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

預覽效果