I have something like this in my code and I am getting error: Exception Details: System.ArgumentException: Value cannot be null or empty. Parameter name: name . What am I doing wrong ? Thanks for help
@model IEnumerable<NHibernateFluentProject.Patient>
@Html.ListBoxFor(model => model, new SelectList(Model,"ID", "FirstName"));
@Html.ListBoxFor is used for your strong typed viewmodel. which could help to bind to your property. First part will take a lambda expression for a single item as a default seleced for your listbox, second part will take the item collections to dispaly all the listbox items. For example: you have following two classes.
public class HospitalViewModel
{
public string SelectedPatient { get; set; }
public IEnumerable<Patient> AllPatients { get; set; }
}
public class Patient
{
public int Id { get; set; }
public string FirstName { get; set; }
}
From you view, you should do something like
@model HospitalViewModel
@Html.ListBoxFor(model => model.SelectedPatient, new SelectList(Model.AllPatients,"Id", "FirstName"));
OR if you only want to bind all your patients to a listbox, then use Html.ListBox instead
@model IEnumerable<Patient>
@Html.ListBox("ListBoxName", new SelectList(Model,"Id", "FirstName"));
