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  • C#教程之轻量ORM-SqlRepoEx （七）AspNetCore应用

ORM-SqlRepoEx 是 .Net平台下兼容.NET Standard 2.0，一个实现以Lambda表达式转转换标准SQL语句，使用强类型操作数据的轻量级ORM工具，在减少魔法字串同时，通过灵活的Lambda表达式组合，实现业务数据查询的多样性。

ORM-SqlRepoEx 也是一个极易使用的工具，通过在AspNetCore中的应用可以展示。

 本案例源码在：

https://github.com/AzThinker/SqlRepoEx2.0DemoForAspCore

或

https://gitee.com/azthinker/SqlRepoEx2.0DemoForAspCore

源码部分代码是使用代码工具生成

https://github.com/AzThinker/CodeToolSolution

 

1、新建一个AspNetCore项目

2、通过Nuget下载SqlRepoEx库、由于本例中是AspNetCore.Mvc项目，案例中使用的是SQL Server的Northwind数据库，所以选择下载

 SqlRepoEx.MsSql.ServiceCollection

 

3、在Startup.cs文件的public void ConfigureServices(IServiceCollection services)中添加

             string ConnectionString = "Data Source=(Local);Initial Catalog=Northwind;User ID=test;Password=test";

            services.AddSimpleSqlRepo(ConnectionString);

 

 

4、增加一个简单类AzCustomers，其属性来源于 Customers 表。为使SqlRepoEx 精准访问，增加特性标识  [TableName("Customers")] 。

 

复制代码
 1 using System;
 2 using SqlRepoEx.Core.CustomAttribute;
 3 
 4 // 客户 业务类
 5 namespace DemoTools.BLL.DemoNorthwind
 6 {
 7     [TableName("Customers")]
 8     /// <summary>
 9     /// 客户 业务类
10     /// </summary>
11     public sealed class AzCustomers
12     {
13         public string CustomerID { get; set; }
14 
15         public string CompanyName { get; set; }
16 
17         public string ContactName { get; set; }
18 
19         public string ContactTitle { get; set; }
20 
21         public string Address { get; set; }
22 
23         public string City { get; set; }
24 
25         public string Region { get; set; }
26 
27         public string PostalCode { get; set; }
28 
29         public string Country { get; set; }
30 
31         public string Phone { get; set; }
32 
33         public string Fax { get; set; }
34 
35     }
36 }
复制代码

 

5、增加一人简单的列表类 AzCustomersList，其中实现了IPagedList接口，此接口是Webdiyer.WebControls.AspNetCore分页控件中定义，由于Webdiyer.WebControls.AspNetCore的源码不支持core2.1，所以重新编译，并将源码加工程中。

 

复制代码
using System;
using System.Collections.Generic;
using Webdiyer.WebControls.AspNetCore;

//客户列表类
namespace DemoTools.BLL.DemoNorthwind
{
    /// <summary>
    /// 客户  列表类
    /// </summary>
    public class AzCustomersList : List<AzCustomers>, IPagedList
    {
        public string DisplayDescription = "客户";
        public int PageSize { get; set; }
        public int TotalItemCount { get; set; }
        public int CurrentPageIndex { get; set; }

        public static AzCustomersList GetModelList((IEnumerable<AzCustomers> QueryResult, int PageCount) queryresult, int pageSize, int currentPageIndex)
        {
            AzCustomersList models = new AzCustomersList();
            models.AddRange(queryresult.QueryResult);
            models.TotalItemCount = queryresult.PageCount;
            models.PageSize = pageSize;
            models.CurrentPageIndex = currentPageIndex;
            return models;
        }
    }
}
复制代码

 

6、增加一个控制器并在控制器的构造方法 AzCustomersController(IRepositoryFactory repositoryFactory)，IRepositoryFactory是SqlRepoEx 工厂类的接口，由于前面（第2条中）已经注册了SqlRepoEx 所需的依赖，此处仅需在构造中加入此接口即可。

 

复制代码
  1 using System.Linq;
  2 using DemoTools.BLL.DemoNorthwind;
  3 using Microsoft.AspNetCore.Authorization;
  4 using Microsoft.AspNetCore.Mvc;
  5 using SqlRepoEx.Abstractions;
  6 
  7 // 客户 控制器
  8 namespace DemoTools.WebUI.DemoNorthwind.Controllers
  9 {
 10     /// <summary>
 11     /// 客户
 12     /// </summary>
 13     public class AzCustomersController : Controller
 14     {
 15         IRepositoryFactory repositoryFactory;
 16         IRepository<AzCustomers> repository;
 17         public AzCustomersController(IRepositoryFactory repositoryFactory)
 18         {
 19             this.repositoryFactory = repositoryFactory;
 20             this.repository = repositoryFactory.Create<AzCustomers>();
 21         }
 22 
 23         /// <summary>
 24         /// 返回 客户 列表
 25         /// 异步调用数据,其异步部分明细View没有Controller只有View
 26         /// </summary>
 27         public IActionResult Index(int pageindex = 1)
 28         {
 29             var queryresult = repository.Query()
 30              .Select(s => s.CustomerID
 31                         , s => s.CompanyName
 32                         , s => s.ContactName
 33                         , s => s.ContactTitle
 34                         , s => s.Address
 35                         , s => s.City
 36                         , s => s.Region
 37                         , s => s.PostalCode
 38                         , s => s.Country
 39                         , s => s.Phone
 40                         , s => s.Fax
 41                 ).OrderBy(o => o.CustomerID).Page(20, pageindex).PageGo();
 42             var model = AzCustomersList.GetModelList(queryresult, 20, pageindex);
 43             string xrh = Request.Headers["X-Requested-With"];
 44             if (!string.IsNullOrEmpty(xrh) && xrh.Equals("XMLHttpRequest", System.StringComparison.OrdinalIgnoreCase))
 45             {
 46                 return PartialView("DetailsPage", model);
 47             }
 48             return View(model);
 49         }
 50 
 51         /// <summary>
 52         /// 增加客户
 53         /// </summary>
 54         public ActionResult Create()
 55         {
 56             var model = new AzCustomers();
 57             return View(model);
 58         }
 59 
 60         /// <summary>
 61         /// 增加保存客户
 62         /// </summary>
 63         [HttpPost, ValidateAntiForgeryToken]
 64         [ActionName("Create")]
 65         public IActionResult CreatePost(AzCustomers model)
 66         {
 67             if (ModelState.IsValid)
 68             {
 69                 repository.Insert().With(s => s.CustomerID, model.CustomerID)
 70                          .With(s => s.CompanyName, model.CompanyName)
 71                          .With(s => s.ContactName, model.ContactName)
 72                          .With(s => s.ContactTitle, model.ContactTitle)
 73                          .With(s => s.Address, model.Address)
 74                          .With(s => s.City, model.City)
 75                          .With(s => s.Region, model.Region)
 76                          .With(s => s.PostalCode, model.PostalCode)
 77                          .With(s => s.Country, model.Country)
 78                          .With(s => s.Phone, model.Phone)
 79                          .With(s => s.Fax, model.Fax)
 80                  .Go();//按增加保存 
 81                 return RedirectToAction("Index");
 82             }
 83             return View(model);
 84         }
 85 
 86         /// <summary>
 87         /// 编辑客户
 88         /// </summary>
 89         public IActionResult Edit(string Id)
 90         {
 91             var model = repository.Query()
 92                     .Select(s => s.CustomerID
 93                             , s => s.CompanyName
 94                             , s => s.ContactName
 95                             , s => s.ContactTitle
 96                             , s => s.Address
 97                             , s => s.City
 98                             , s => s.Region
 99                             , s => s.PostalCode
100                             , s => s.Country
101                             , s => s.Phone
102                             , s => s.Fax
103                      ).Where(s => s.CustomerID == Id).Go().FirstOrDefault();
104             return View(model);
105         }
106 
107         /// <summary>
108         ///  保存编辑的客户
109         /// </summary>
110         [HttpPost, ValidateAntiForgeryToken]
111         [ActionName("Edit")]
112         public IActionResult EditPost(AzCustomers model)
113         {
114             if (ModelState.IsValid)
115             {
116                 repository.Update().Set(s => s.CustomerID, model.CustomerID)
117                         .Set(s => s.CompanyName, model.CompanyName)
118                         .Set(s => s.ContactName, model.ContactName)
119                         .Set(s => s.ContactTitle, model.ContactTitle)
120                         .Set(s => s.Address, model.Address)
121                         .Set(s => s.City, model.City)
122                         .Set(s => s.Region, model.Region)
123                         .Set(s => s.PostalCode, model.PostalCode)
124                         .Set(s => s.Country, model.Country)
125                         .Set(s => s.Phone, model.Phone)
126                         .Set(s => s.Fax, model.Fax)
127             .Go();//按增加保存 
128                 return RedirectToAction("Index");
129             }
130             return View(model);
131         }
132 
133         /// <summary>
134         /// 显示客户单个记录
135         /// </summary>
136         public IActionResult Details(string Id)
137         {
138             var model = repository.Query()
139                     .Select(s => s.CustomerID
140                             , s => s.CompanyName
141                             , s => s.ContactName
142                             , s => s.ContactTitle
143                             , s => s.Address
144                             , s => s.City
145                             , s => s.Region
146                             , s => s.PostalCode
147                             , s => s.Country
148                             , s => s.Phone
149                             , s => s.Fax
150                      ).Where(s => s.CustomerID == Id).Go().FirstOrDefault();
151             return View(model);
152         }
153 
154         /// <summary>
155         /// 独立页面删除客户
156         /// </summary>
157         public ActionResult Delete(string Id)
158         {
159             var model = repository.Query()
160                   .Select(s => s.CustomerID
161                           , s => s.CompanyName
162                           , s => s.ContactName
163                           , s => s.ContactTitle
164                           , s => s.Address
165                           , s => s.City
166                           , s => s.Region
167                           , s => s.PostalCode
168                           , s => s.Country
169                           , s => s.Phone
170                           , s => s.Fax
171                    ).Where(s => s.CustomerID == Id).Go().FirstOrDefault();
172             return View(model);
173         }
174 
175         /// <summary>
176         /// 独立页面删除客户
177         /// </summary>
178         [HttpPost, ActionName("Delete")]
179         public IActionResult DeleteConfirmed(AzCustomers model)
180         {
181             repository.Delete().Where(c => c.CustomerID == model.CustomerID).Go();
182             return RedirectToAction("Index");
183         }
184 
185     }
186 }
复制代码

 

7、View的实现和其他代码参见上面给出的地址中的源码。

 

总结：从上面看出，对特SqlRepoEx 所需要特定的操作，仅在第2、第3、第6中是必需的

（1）、引用SqlRepoEx.MsSql.ServiceCollection

（2）、 services.AddSimpleSqlRepo(ConnectionString);

（3）、 AzCustomersController(IRepositoryFactory repositoryFactory)

（4）、this.repository = repositoryFactory.Create<AzCustomers>();

 

然后就可以轻松的通过SqlRepoEx 访问数据库了。

有兴趣的请在QQ群中参与讨论、联系作者 QQ群名称：.Net 高效开发 

GitHub的https://github.com/azthinker
开源中国 https://gitee.com/azthinker

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