在我的ASP.NET MVC应用程序中，用户可以发布项目，并将它们存储在数据库中。像往常一样，项目的索引视图中用户可以看到所有可用项目的列表，以及旁边的一些操作链接（详细信息/应用）。
当用户点击＆＃34;应用＆＃34;动作链接，他被要求填写一些关于他想参加的原因（求职信）。在他提交之后，应用程序存储在数据库中，其中包含一个唯一的ApplicationId，用户的UserId和他正在申请的ProjectId，因此我可以跟踪所有申请。
public class Application
{
public int ApplicationId { get; set; }
public int ProjectId { get; set; }
public string UserId { get; set; }
public string CoverLetter { get; set; }
}
在＆＃34;细节＆＃34;查看，正在显示所有项目的数据，并设法使其显示所有申请该项目的求职信和用户标识。
Cover letters:
@foreach (var item in Model.Applications)
{
<tr>
<td>
<br/>
@Html.DisplayFor(modelItem => item.CoverLetter) |
@Html.DisplayFor(modelItem => item.UserId) |
</td>
</tr>
}
应用程序中的UserId和CoverLetter已成功检索，但我需要的是基于UserId从数据库中检索用户的名称和电子邮件。
编辑：这是整个ProjectsController：
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Net;
using System.Web.Mvc;
using System.Web.Security;
using Leepio.Models;
using Microsoft.ApplicationInsights.Web;
using Microsoft.AspNet.Identity;
namespace Leepio.Controllers
{
public class ProjectsController : Controller
{
private ApplicationDbContext db = new ApplicationDbContext();
// GET: Projects
[Authorize(Roles = "companyRole, studentRole")]
public ActionResult Index(string SortOrder, string SortBy, string Page)
{
ViewBag.SortOrder = SortOrder;
ViewBag.SortBy = SortBy;
var projects = db.Projects.ToList();
var model = new ApplicationTwoViewModel
{
Model1 = new List<Project>(projects),
Model2 = new Application
{
UserId = User.Identity.GetUserId(),
ProjectId = 11,
CoverLetter = "asdf",
ApplicationId = 23,
}
};
switch (SortBy)
{
case "Title":
switch (SortOrder)
{
case "Asc":
projects = projects.OrderBy(x => x.Title).ToList();
break;
case "Desc":
projects = projects.OrderByDescending(x => x.Title).ToList();
break;
default:
break;
}
break;
case "ApplicationDeadline":
switch (SortOrder)
{
case "Asc":
projects = projects.OrderBy(x => x.ApplicationDeadline).ToList();
break;
case "Desc":
projects = projects.OrderByDescending(x => x.ApplicationDeadline).ToList();
break;
default:
break;
}
break;
case "Duration":
switch (SortOrder)
{
case "Asc":
projects = projects.OrderBy(x => x.Duration).ToList();
break;
case "Desc":
projects = projects.OrderByDescending(x => x.Duration).ToList();
break;
default:
break;
}
break;
case "HourlyRate":
switch (SortOrder)
{
case "Asc":
projects = projects.OrderBy(x => x.HourlyRate).ToList();
break;
case "Desc":
projects = projects.OrderByDescending(x => x.HourlyRate).ToList();
break;
default:
break;
}
break;
case "TotalProjectCost":
switch (SortOrder)
{
case "Asc":
projects = projects.OrderBy(x => x.TotalProjectCost).ToList();
break;
case "Desc":
projects = projects.OrderByDescending(x => x.TotalProjectCost).ToList();
break;
default:
break;
}
break;
case "City":
switch (SortOrder)
{
case "Asc":
projects = projects.OrderBy(x => x.City).ToList();
break;
case "Desc":
projects = projects.OrderByDescending(x => x.City).ToList();
break;
default:
break;
}
break;
case "RequiredPresencePercent":
switch (SortOrder)
{
case "Asc":
projects = projects.OrderBy(x => x.RequiredPresencePercent).ToList();
break;
case "Desc":
projects = projects.OrderByDescending(x => x.RequiredPresencePercent).ToList();
break;
default:
break;
}
break;
case "Language":
switch (SortOrder)
{
case "Asc":
projects = projects.OrderBy(x => x.Language).ToList();
break;
case "Desc":
projects = projects.OrderByDescending(x => x.Language).ToList();
break;
default:
break;
}
break;
case "RequiredSkills":
switch (SortOrder)
{
case "Asc":
projects = projects.OrderBy(x => x.RequiredSkills).ToList();
break;
case "Desc":
projects = projects.OrderByDescending(x => x.RequiredSkills).ToList();
break;
default:
break;
}
break;
default:
projects = projects.OrderBy(x => x.Title).ToList();
break;
}
ViewBag.TotalPages = Math.Ceiling(db.Projects.ToList().Count()/10.0);
int page = int.Parse(Page == null ? "1" : Page);
ViewBag.Page = page;
model.Model1 = projects;
model.Model1 = model.Model1.Skip((page - 1) * 10).Take(10).ToList();
return View(model);
}
private UserManager<IUser<> userManager;
// GET: Projects/Details/5
[Authorize(Roles = "companyRole, studentRole")]
public ActionResult Details(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Project project = db.Projects.Find(id);
if (project == null)
{
return HttpNotFound();
}
return View(project);
}
// GET: Projects/Create
[Authorize(Roles= "companyRole")]
public ActionResult Create()
{
return View();
}
// POST: Projects/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
[Authorize(Roles = "companyRole")]
public ActionResult Create([Bind(Include = "UserId,ProjectId,Title,ApplicationDeadline,Duration,HourlyRate,TotalProjectCost,City,RequiredPresencePercent,Language,RequiredSkills,Description")] Project project)
{
if (ModelState.IsValid)
{
project.UserId = User.Identity.GetUserId();
db.Projects.Add(project);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(project);
}
// GET: Projectts/Edit/5
[Authorize(Roles = "companyRole")]
public ActionResult Edit(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Project project = db.Projects.Find(id);
if (project == null)
{
return HttpNotFound();
}
return View(project);
}
// POST: Projects/Edit/5
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
[Authorize(Roles = "companyRole")]
public ActionResult Edit([Bind(Include = "ProjectId,UserId,Title,ApplicationDeadline,Duration,HourlyRate,TotalProjectCost,City,RequiredPresencePercent,Language,RequiredSkills,Description")] Project project)
{
if (ModelState.IsValid)
{
if (project.UserId == User.Identity.GetUserId())
{
db.Entry(project).State = EntityState.Modified;
db.SaveChanges();
return RedirectToAction("Index");
}
return HttpNotFound("Project is not yours!");
}
return View(project);
}
// GET: Projects/Delete/5
[Authorize(Roles = "companyRole")]
public ActionResult Delete(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Project project = db.Projects.Find(id);
if (project == null)
{
return HttpNotFound();
}
return View(project);
}
// POST: Projects/Delete/5
[HttpPost, ActionName("Delete")]
[ValidateAntiForgeryToken]
[Authorize(Roles = "companyRole")]
public ActionResult DeleteConfirmed(int id)
{
Project project = db.Projects.Find(id);
if (project.UserId == User.Identity.GetUserId())
{
db.Projects.Remove(project);
db.SaveChanges();
}
else
{
return HttpNotFound("Project is not yours!");
}
return RedirectToAction("Index");
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
db.Dispose();
}
base.Dispose(disposing);
}
}
}
我是否真的需要更改ApplicationController内的任何内容？我不知道该怎么做。
答案 0 :(得分：1)
您可能无需修改ApplicationController。找到Project后，使用Project.UserId从Identity框架中获取关联的User，例如... UserManager.FindByIdAsync(userId)。
您需要修改已退回的模型以将该信息传递回您的视图，但可以实现您的请求。
鉴于您当前的Application课程，您可以从头开始或通过继承创建新模型，添加视图所需的属性...
public class ProjectDetailsApplicationModel : Application {
public string UserName { get; set; }
public string Email { get; set; }
}
......上面通过继承显示了模型。
然后，您可以为视图创建一个视图模型，其中包含显示所需详细信息所需的所有信息...
public class ProjectDetailsModel {
public Project Project { get; set; }
public IEnumerable<ProjectDetailsApplicationModel> Applications { get; set; }
}
现在您表示您正在使用Asp.Net-Identity框架，因此假设您的ProjectsController可以修改为类似的内容......
public class ProjectsController : Controller {
private ApplicationDbContext db;
private ApplicationUserManager userManager;
public ProjectController() {
this.userManager = new ApplicationUserManager();
this.db = new ApplicationDbContext();
}
//...other code removed for brevity
public async Task<ActionResult> Details(int? id) {
if (id == null) {
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Project project = db.Projects.Find(id);
if (project == null) {
return HttpNotFound();
}
//construct model...
var model = new ProjectDetailsViewModel {
Project = project,
Applications = await BuildApplicationModels(project.Applications)
}
return View(model);
}
private async Task<IEnumerable<ProjectDetailsApplicationModel>> BuildApplicationModels(IEnumerable<Application> applications) {
List<ProjectDetailsApplicationModel> result = new List<ProjectDetailsApplicationModel>();
foreach (var application in applications) {
var model = new ProjectDetailsApplicationModel {
ApplicationId = application.ApplicationId,
ProjectId = application.ProjectId,
UserId = application.UserId,
CoverLetter = application.CoverLetter
};
var user = await userManager.FindByIdAsync(application.UserId);
if (user != null) {
model.UserName = user.UserName;
model.Email = user.Email;
}
result.Add(model);
}
return result;
}
}
然后，您可以在视图中引用用户的姓名和电子邮件...
@model: ProjectDetailsModel
<!--...other markup...-->
Cover letters:
@foreach (var item in Model.Applications)
{
<tr>
<td>
<br/>
@Html.DisplayFor(modelItem => item.CoverLetter) |
@Html.DisplayFor(modelItem => item.UserName) |
@Html.DisplayFor(modelItem => item.Email) |
</td>
</tr>
}
答案 1 :(得分：0)
我找到了解决方案，简单得多。
在ProjectsController内部详细说明GET方法：
public ActionResult Details(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Project project = db.Projects.Find(id);
var user = UserManager.FindByIdAsync(project.UserId);
ViewData["user"] = user.Result.Email;
if (project == null)
{
return HttpNotFound();
}
return View(project);
}
基本上检索'user'var中的整个User实体。 然后我用ViewData [“user”] = user.Result.Email发送它到视图;
@foreach (var item in Model.Applications)
{
<tr>
<td>
<br />
@Html.DisplayFor(modelItem => item.CoverLetter) |
@Html.DisplayFor(modelItem => @ViewData["user"])
</td>
</tr>
}
我将UserManager初始化为：
private ApplicationDbContext db = new ApplicationDbContext();
public ProjectsController()
: this(new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(new ApplicationDbContext())))
{
}
public ProjectsController(UserManager<ApplicationUser> userManager)
{
UserManager = userManager;
}
public UserManager<ApplicationUser> UserManager { get; set; }