目录
- 1.仓储模式在MVC应用程序中的使用
- 2.泛型仓储模式在MVC应用程序中的使用
- 3.MVC Code-First和仓储模式的应用
- 4.待续....
这篇文章中，我会解释仓储模式在MVC程序中的使用。
首先，我们需要理解什么是仓储模式【repository Pattern】,来看看下面的图片
没有使用仓储模式的MVC应用程序：
使用了仓储模式的MVC应用程序：
仓储模式，是一个抽象层，它将数据库的访问逻辑，映射到实体的访问逻辑。
下面，我们来看做一个应用程序，来体验一下仓储模式吧。
首先，打开VS2013，找到--“文件”--->>"新建"---->>"项目"
选择“ASp.NET Web 应用程序”，输入名称，选择项目存放的位置，点击”确定“按钮
在弹出来的对话框中，选择“MVC”模板，然后点击“更改身份验证”，选择“无身份验证”，点击“确定”。
接下来就生成了项目模板：
好了，第一阶段的工作就完成了。新建一个MVC程序。
现在开始第二阶段的任务：
这篇文章中，我打算使用EF Model First来完成。
首先，我来新建一个数据库，还有数据表，打开SQL 2008
这样就创建好了数据库和数据表，
USE master GO IF EXISTS (SELECT * FROM sysdatabases WHERE name=‘EmployeeManagementDB‘) DROP DATABASE EmployeeManagementDB GO CREATE DATABASE EmployeeManagementDB GO USE EmployeeManagementDB GO IF EXISTS(SELECT * FROM sysobjects WHERE name=‘Employee‘) DROP TABLE Employee GO CREATE TABLE Employee ( ID INT NOT NULL PRIMARY KEY IDENTITY(1,1), Name NVARCHAR(50) NOT NULL, Age INT NOT NULL, Email NVARCHAR(200) NOT NULL )
SQL脚本
现在就开始下面的步骤吧，右键点击项目，选择添加-->新建项
在演出来的对话框中，选择Visual C#-->ADO.NET实体数据模型-->输入名称--->添加
然后在弹出开的对话框中，选择第一个-->>>”来自数据库的EF设计器“,点击下一步：
在弹出来的对话框中，选择--“新建连接”，然后点击下一步
在出来的对画框中，输入信息，连接上我们刚才创建的数据库。测试通过之后，点击确定。
好了，截图截的差不多了，现在在我们项目中添加一个文件夹DAL，然后在往这个文件夹中，添加一个接口-->>>IEmployeeRepository.cs.
现在就是Coding了，接口中的代码是：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace RepositoryPatternMVCWithEntityFramework.DAL
{
interface IEmployeeRepository<T> where T:class
{
/// <summary>
/// 获取所有的Employee
/// </summary>
/// <returns></returns>
IEnumerable<T> GetAllEmployee();
/// <summary>
/// 根据ID获取
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
T GetEmployeeById(object id);
/// <summary>
/// 增加
/// </summary>
/// <param name="obj"></param>
void InsertEmployee(T obj);
/// <summary>
/// 更新
/// </summary>
/// <param name="obj"></param>
void UpdateEmployee(T obj);
/// <summary>
/// 删除
/// </summary>
/// <param name="id"></param>
void DeleteEmployee(object id);
/// <summary>
/// 保存
/// </summary>
void Save();
void Dispose();
}
}
然后在DAL文件夹下，在添加一个类EmployeeRepository ，代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace RepositoryPatternMVCWithEntityFramework.DAL
{
public class EmployeeRepository:IEmployeeRepository<Employee>,IDisposable
{
private EmployeeManagementDBEntities context;
public EmployeeRepository(EmployeeManagementDBEntities context)
{
this.context = context;
}
public IEnumerable<Employee> GetAllEmployee()
{
return context.Employees.ToList();
}
public Employee GetEmployeeById(object id)
{
return context.Employees.Find(id);
}
public void InsertEmployee(Employee obj)
{
context.Employees.Add(obj);
}
public void UpdateEmployee(Employee obj)
{
context.Entry(obj).State = System.Data.EntityState.Modified;
}
public void DeleteEmployee(object id)
{
Employee em= context.Employees.Find(id);
context.Employees.Remove(em);
}
public void Save()
{
context.SaveChanges();
}
private bool disposed = false;
protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
{
context.Dispose();
}
}
this.disposed = true;
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
}
}
然后，在控制器文件夹下，添加一个控制器EmployController，空的。。
然后，先暂停一下，我这边打算使用分页，引用pageList.mvc
现在控制器的代码：
using RepositoryPatternMVCWithEntityFramework.DAL;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
//分页引用
using PagedList;
namespace RepositoryPatternMVCWithEntityFramework.Controllers
{
public class EmployeeController : Controller
{
private IEmployeeRepository<Employee> employeeRepository;
public EmployeeController()
{
this.employeeRepository = new EmployeeRepository(new EmployeeManagementDBEntities());
}
// GET: Employee
public ViewResult Index(string sortOrder, string currentFilter, string searchString, int? page)
{
ViewBag.CurrentSort = sortOrder;
ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "ID" : "";
if (searchString != null)
{
page = 1;
}
else
{
searchString = currentFilter;
}
ViewBag.CurrentFilter = searchString;
var employees = from s in employeeRepository.GetAllEmployee()
select s;
if (!String.IsNullOrEmpty(searchString))
{
employees = employees.Where(s => s.Name.ToUpper().Contains(searchString.ToUpper())
|| s.Name.ToUpper().Contains(searchString.ToUpper()));
}
switch (sortOrder)
{
case "ID":
employees = employees.OrderByDescending(s => s.ID);
break;
case "Name":
employees = employees.OrderBy(s => s.Name);
break;
case "Email":
employees = employees.OrderBy(s => s.Email);
break;
case "Age":
employees = employees.OrderBy(s => s.Age);
break;
default:
employees = employees.OrderBy(s => s.ID);
break;
}
int pageSize = 5;
int pageNumber = (page ?? 1);
return View(employees.ToPagedList(pageNumber, pageSize));
}
// GET: /Employee/Details/5
public ViewResult Details(int id)
{
Employee emp = employeeRepository.GetEmployeeById(id);
return View(emp);
}
// GET: /Employee/Create
public ActionResult Create()
{
return View();
}
// POST: /Employee/Create
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(
[Bind(Include = "Name, Email")] Employee emp)
{
try
{
if (ModelState.IsValid)
{
employeeRepository.InsertEmployee(emp);
employeeRepository.Save();
return RedirectToAction("Index");
}
}
catch (Exception ex)
{
ModelState.AddModelError(string.Empty, "Some Error Occured.");
}
return View(emp);
}
// GET: /Employee/Edit/5
public ActionResult Edit(int id)
{
Employee emp = employeeRepository.GetEmployeeById(id);
return View(emp);
}
// POST: /Employee/Edit/5
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit(Employee emp)
{
try
{
if (ModelState.IsValid)
{
employeeRepository.UpdateEmployee(emp);
employeeRepository.Save();
return RedirectToAction("Index");
}
}
catch (Exception ex)
{
ModelState.AddModelError(string.Empty, "Some error Occured.");
}
return View(emp);
}
// GET: /employee/Delete/5
public ActionResult Delete(bool? saveChangesError = false, int id = 0)
{
if (saveChangesError.GetValueOrDefault())
{
ViewBag.ErrorMessage = "Some Error Occured.";
}
Employee emp = employeeRepository.GetEmployeeById(id);
return View(emp);
}
// POST: /Employee/Delete/5
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Delete(int id)
{
try
{
Employee emp = employeeRepository.GetEmployeeById(id);
employeeRepository.DeleteEmployee(id);
employeeRepository.Save();
}
catch (Exception ex)
{
return RedirectToAction("Delete", new { id = id, saveChangesError = true });
}
return RedirectToAction("Index");
}
protected override void Dispose(bool disposing)
{
employeeRepository.Dispose();
base.Dispose(disposing);
}
}
}
Index视图：
@using PagedList.Mvc;
@model PagedList.IPagedList<Employee>
@*分页CSS*@
<link href="~/Content/PagedList.css" rel="stylesheet" type="text/css" /> 备注一下，这个是添加pagedList分页之后，自动添加进来的。
@{
ViewBag.Title = "Employee Management System";
}
<h2>Employee Management System</h2>
@using (Html.BeginForm("Index", "Employee", FormMethod.Get))
{
<p style="background-color:red; color:white; font-size:16pt; padding:10px;">
Search Employee By Name: @Html.TextBox("SearchString", ViewBag.CurrentFilter as string)
<input type="submit" value="Search" />
@Html.ActionLink("Add New Employee", "Create")
</p>
}
<table style="background-color:white;">
<tr>
<th></th>
<th style="width: 100px;">
@Html.ActionLink("Emp ID", "Index", new { sortOrder = ViewBag.NameSortParm, currentFilter = ViewBag.CurrentFilter })
</th>
<th>
@Html.ActionLink("Name", "Index", new { sortOrder = ViewBag.NameSortParm, currentFilter = ViewBag.CurrentFilter })
</th>
<th>
Email
</th>
<th>
Age
</th>
<th style="width: 150px;"></th>
</tr>
@foreach (var item in Model)
{
<tr>
<td></td>
<td>
@Html.DisplayFor(modelItem => item.ID)
</td>
<td style="width:130px;">
@Html.DisplayFor(modelItem => item.Name)
</td>
<td>
@Html.DisplayFor(modelItem => item.Email)
</td>
<td style="width:140px;">
@Html.DisplayFor(modelItem => item.Age)
</td>
<td style="width:270px;">
@Html.ActionLink("Edit", "Edit", new { id = item.ID }) |
@Html.ActionLink("Details", "Details", new { id = item.ID }) |
@Html.ActionLink("Delete", "Delete", new { id = item.ID })
</td>
</tr>
}
</table>
<br />
<div style="background-color:orange; padding-left:15px; padding-top:10px;">
Showing Records @(Model.PageCount < Model.PageNumber ? 0 : Model.PageNumber) of @Model.PageCount //备注一下：这里的Pagecount ,PageNumber也都是///分页控件中的
@Html.PagedListPager(Model, page => Url.Action("Index", new { page, sortOrder = ViewBag.CurrentSort, currentFilter = ViewBag.CurrentFilter }))
</div>
Create视图：
@model Employee
<script src="~/Scripts/jquery-1.7.1.min.js"></script>
<script src="~/Scripts/jquery.validate.min.js"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)
<fieldset>
<legend>Employee</legend>
<div class="editor-label">
@Html.LabelFor(model => model.Name)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Name)
@Html.ValidationMessageFor(model => model.Name)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Email)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Email)
@Html.ValidationMessageFor(model => model.Email)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Age)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Age)
@Html.ValidationMessageFor(model => model.Age)
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
Edit视图：
@model Employee
<script src="~/Scripts/jquery-1.7.1.min.js"></script>
<script src="~/Scripts/jquery.validate.min.js"></script>
<script src="~/Scripts/jquery.validate.unobtrusive.min.js"></script>
<h2>Edit Employee information</h2>
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)
<table>
<tr>
<td>@Html.LabelFor(model => model.ID)</td>
<td>
@Html.EditorFor(model => model.ID, new { disabled = "disabled", @readonly = "readonly" })
@Html.ValidationMessageFor(model => model.ID)
</td>
</tr>
<tr>
<td>
@Html.LabelFor(model => model.Name)
</td>
<td>
@Html.EditorFor(model => model.Name)
@Html.ValidationMessageFor(model => model.Name)
</td>
</tr>
<tr>
<td>@Html.LabelFor(model => model.Email)</td>
<td>
@Html.EditorFor(model => model.Email)
@Html.ValidationMessageFor(model => model.Email)
</td>
</tr>
<tr>
<td>@Html.LabelFor(model => model.Age)</td>
<td>
@Html.EditorFor(model => model.Age)
@Html.ValidationMessageFor(model => model.Age)
</td>
</tr>
<tr style="background-color: orange; padding: 25px;">
<td></td>
<td>
<input type="submit" value="Save" />
@Html.ActionLink("Back to List", "Index")
</td>
</tr>
</table>
}
delete视图：
@model Employee
<h3>Are you sure you want to delete this?</h3>
<table>
<tr>
<td>@Html.DisplayNameFor(model => model.ID)</td>
<td>@Html.DisplayFor(model => model.ID)</td>
</tr>
<tr>
<td>@Html.DisplayNameFor(model => model.Name)</td>
<td>@Html.DisplayFor(model => model.Name)</td>
</tr>
<tr>
<td>@Html.DisplayNameFor(model => model.Email)</td>
<td>@Html.DisplayFor(model => model.Email)</td>
</tr>
<tr>
<td>@Html.DisplayNameFor(model => model.Age)</td>
<td>@Html.DisplayFor(model => model.Age)</td>
</tr>
</table>
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<table>
<tr style="background-color: orange; padding: 25px;">
<td></td>
<td>
<input type="submit" value="Delete" />
@Html.ActionLink("Back to List", "Index")
</td>
</tr>
</table>
}
Details视图：
@model Employee
<h2>Employee Details</h2>
<table>
<tr>
<td>@Html.DisplayNameFor(model => model.ID)</td>
<td>@Html.DisplayFor(model => model.ID)</td>
</tr>
<tr>
<td>@Html.DisplayNameFor(model => model.Name)</td>
<td>@Html.DisplayFor(model => model.Name)</td>
</tr>
<tr>
<td>@Html.DisplayNameFor(model => model.Email)</td>
<td>@Html.DisplayFor(model => model.Email)</td>
</tr>
<tr style="background-color: orange; padding: 25px;">
<td></td>
<td>
@Html.ActionLink("Edit", "Edit", new { id = Model.ID }) |
@Html.ActionLink("Back to List", "Index")
</td>
</tr>
</table>
效果图：
目录
- 1.仓储模式在MVC应用程序中的使用
- 2.泛型仓储模式在MVC应用程序中的使用
- 3.MVC Code-First和仓储模式的应用
- 4.待续....
时间： 2024-10-11 08:57:38