Question

I created a list property in my model like so

public virtual List<String> listOfDays { get; set; }

then I converted and stored it in the list like this:

for (int i = 0; i < 30 i++)
{
            var enrollment = new Enrollment();
            enrollment.StudentID = id;
            enrollment.listOfDays = searchString.ToList(); 
            db.Enrollments.Add(enrollment);
            db.SaveChanges();
}

I put a breakpoint here… enrollment.listOfDays = searchString.ToList(); … and all is well. I see that the conversion was performed and I can see the values in listOfDays.

So I thought I would find a column in my database called listOfDays since I’m doing code first but the property is not there.

Then I thought I’d try accessing it anyway like this…

var classdays = from e in db.Enrollments where e.StudentID == id select e.listOfDays;

var days = classdays.ToList(); 
//here I get an error message about this not being supported in Linq.

Questions:

• Why do you think the property was not in the database?
• How can I post this array to my model then access it in a controller?

Thanks for any help.

Thanks to Decker: http://forums.asp.net/members/Decker%20Dong%20-%20MSFT.aspx

Here’s how it works:

Using form collection here…

In [HttpPost]…

private void Update (FormCollection formCollection, int id)

for (int sc = 0; sc < theSelectedCourses.Count(); sc++)
{
var enrollment = new Enrollment();
enrollment.CourseID = Convert.ToInt32(theSelectedCourses[sc]);
enrollment.StudentID = id;
enrollment.listOfDays = formCollection[“searchString”] ;//bind this as a string instead of a list or array.

Then in [HttpGet]…

private void PopulateAssignedenrolledData(Student student, int id)
{

var dayList = from e in db.Enrollments where e.StudentID == id select e;

var days = dayList.ToList();
if (days.Count > 0)
{
string dl = days.FirstOrDefault().listOfDays;
string[] listofdays = dl.Split(‘,’);
ViewBag.classDay = listofdays.ToList();
}

Answer 1

Thanks to Decker: http://forums.asp.net/members/Decker%20Dong%20-%20MSFT.aspx

Here’s how it works:

Using form collection here…

In [HttpPost]…

private void Update (FormCollection formCollection, int id)

for (int sc = 0; sc < theSelectedCourses.Count(); sc++)
{
var enrollment = new Enrollment();
enrollment.CourseID = Convert.ToInt32(theSelectedCourses[sc]);
enrollment.StudentID = id;
enrollment.listOfDays = formCollection[“searchString”] ;//bind this as a string instead of a list or array.

Then in [HttpGet]…

private void PopulateAssignedenrolledData(Student student, int id)
{

var dayList = from e in db.Enrollments where e.StudentID == id select e;

var days = dayList.ToList();
if (days.Count > 0)
{
string dl = days.FirstOrDefault().listOfDays;
string[] listofdays = dl.Split(‘,’);
ViewBag.classDay = listofdays.ToList();
}