For each student make comma-separated list of all courses for which he enlisted - asp.net-mvc-4

Question

Could somebody help me for each student make comma-separated list of all courses for which he enlisted?
I need to modify a Contoso University application with a comma-separated list.
Student Controller:
public ActionResult Index(string studentEnrollment, string sortOrder, string currentFilter, string searchString, int? page)
{
ViewBag.CurrentSort = sortOrder;
ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "name_desc" : "";
ViewBag.DateSortParm = sortOrder == "Date" ? "date_desc" : "Date";
if (searchString != null)
{
page = 1;
}
else
{
searchString = currentFilter;
}
ViewBag.CurrentFilter = searchString;
var students = studentService.GetAll();
var studentViewModel = Mapper.Map<IEnumerable<Student>, IEnumerable<StudentViewModel>>(students);
if (!String.IsNullOrEmpty(searchString))
{
students = students.Where(s => s.LastName.ToUpper().Contains(searchString.ToUpper())
|| s.FirstMidName.ToUpper().Contains(searchString.ToUpper()));
}
switch (sortOrder)
{
case "name_desc":
students = students.OrderByDescending(s => s.LastName);
break;
case "Date":
students = students.OrderBy(s => s.EnrollmentDate);
break;
case "date_desc":
students = students.OrderByDescending(s => s.EnrollmentDate);
break;
default:
students = students.OrderBy(s => s.LastName);
break;
}
int pageSize = 3;
int pageNumber = (page ?? 1);
return View(students.ToPagedList(pageNumber, pageSize));
}
Course Controller:
public ActionResult Index(int? page)
{
int pageNumber = page ?? 1;
var courses = courseService.GetAll();
var coursesViewList = Mapper.Map<IEnumerable<Course>, IEnumerable<CourseViewModel>>(courses);
var model = coursesViewList.ToPagedList(pageNumber, PageSize);
return View(model);
}
Student Model:
public int ID { get; set; }
[Display(Name = "Last Name")]
public string LastName { get; set; }
[Display(Name = "First Name")]
public string FirstMidName { get; set; }
[Display(Name = "Enrollment Date")]
[DisplayFormat(DataFormatString = "{0:g}", ApplyFormatInEditMode = true)]
public DateTime EnrollmentDate { get; set; }
[Display(Name = "Date Of Birth")]
[DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}", ApplyFormatInEditMode = true)]
public DateTime DateOfBirth { get; set; }
public virtual ICollection<Enrollment> Enrollments { get; set; }
public List<Comment> Comments { get; set; }
Course Model:
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int CourseID { get; set; }
[Required]
public string Title { get; set; }
public int Credits { get; set; }
public int StudentId { get; set; }
public virtual Student Student { get; set; }
public virtual ICollection<Enrollment> Enrollments { get; set; }
View:
#model PagedList.IPagedList<ContosoUniversity.Models.Student>
#using PagedList.Mvc;
<link href="~/Content/PagedList.css" rel="stylesheet" type="text/css" />
#{
ViewBag.Title = "Students";
}
<h2>Students</h2>
<p>
#Html.ActionLink("Create New", "Create")
</p>
#using (Html.BeginForm("Index", "Student", FormMethod.Get))
{
#Html.AntiForgeryToken()
#Html.ValidationSummary(true)
<p>
Find by name: #Html.TextBox("SearchString", ViewBag.CurrentFilter as string)
<input type="submit" value="Filter" />
</p>
}
<table class="table">
<tr>
<th>
#Html.ActionLink("Last Name", "Index", new { sortOrder = ViewBag.NameSortParm })
</th>
<th>
First Name
</th>
<th>
#Html.ActionLink("Enrollment Date", "Index", new { sortOrder = ViewBag.DateSortParm })
</th>
<th>
Date Of Birth
</th>
<th>
Courses
</th>
<th></th>
</tr>
#foreach (var item in Model) {
<tr>
<td>
#Html.DisplayFor(modelItem => item.LastName)
</td>
<td>
#Html.DisplayFor(modelItem => item.FirstMidName)
</td>
<td>
#Html.DisplayFor(modelItem => item.EnrollmentDate)
</td>
<td>
#Html.DisplayFor(modelItem => item.DateOfBirth)
</td>
<td>
</td>
<td>
#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 />
Page #(Model.PageCount < Model.PageNumber ? 0 : Model.PageNumber) of #Model.PageCount
#Html.PagedListPager(Model, page => Url.Action("Index",
new { page, sortOrder = ViewBag.CurrentSort, currentFilter = ViewBag.CurrentFilter }))
Please tell me somebody the easiest way to do it!

Answer 1

Without knowing the model for the Enrollment class, assuming it has a Course property which returns a Course object, you can just do this in your view (where item is the Student object in your foreach loop):
#string.Join(",", item.Enrollments.Select(e => e.Course.Title))