How can a single view access multiple models in mvc3 - asp.net-mvc

Question

i am developing an application in MVC3.
Basically it is an Question Forum where on Question page user will see all questions as link and a post comment box at the end.and when he clicks on question link he is moved to the answers page.now the answer page is using another model class and their i am not able to acess my answer class data
what i found was every Controller has a view and a model
but i want my view to access multiple models and i dont knw how to go about it..
I tried this:
public class MainClass
{
public Question_Page question{ get; set; }
public Answer_Page answer { get; set; }
}
public class Question_Page
{
public virtual int Id { get; set; }
public virtual string Question_name { get; set; }
public virtual DateTime Created_Date { get; set; }
public virtual DateTime Modified_Date { get; set; }
public virtual int Created_By { get; set; }
public virtual int Modified_By { get; set; }
public virtual char Deleted { get; set; }
public Question_Page()
{
this.Deleted='F';
}
}
public class Answer_Page
{
public virtual int Id { get; set; }
public virtual string Answer { get; set; }
public virtual DateTime Created_Date { get; set; }
public virtual DateTime Modified_Date { get; set; }
public virtual int Created_By { get; set; }
public virtual int Modified_By { get; set; }
public virtual char Deleted { get; set; }
public virtual Question_Page Question { get; set; }
public Answer_Page()
{
this.Deleted='F';
}
}
Now inside the view of Questions List where i display a list of questions:
#model IEnumerable<Core.Model.MainPage>
#{
ViewBag.Title = "Index";
}
<style type="text/css">
ul
{
list-style-type: none;
}
</style>
<h2>All Questions</h2>
<hr />
#using (Html.BeginForm("Index","Question",FormMethod.Post))
{
#Html.ValidationSummary(true)
<ul>
#foreach (var item in Model)
{
<li>#Html.ActionLink(item.Question_name, "answer", new { Qry = item.Id })</li>
}
</ul>
<label for="PostyourQuestion:">Post your Question:</label><br /><br />
#Html.TextArea("textID")
<br />
<input type="submit"/>
}
after doing this much i am gettin errorin line:
#foreach (var item in Model)
This is my controller:
public ActionResult Index()
{
return View(new StudentService().GetAllStudents());
}
[HttpPost]
public ActionResult Index(Question_Page question,string textID)
{
question.Question_name = textID;
question.Created_Date = DateTime.Now;
question.Modified_Date = DateTime.Now;
question.Created_By = 101;
question.Modified_By = 101;
new StudentService().SaveOrUpdateStudent(question);
return View(new StudentService().GetAllStudents());
}
StudentService is a class where i hv defined the methods GetAllStudents(),SaveOrUpdateStudent()
Please help me

Answer 1

Your answer is rather simple I think?
#foreach (var item in Model)
should be
#foreach (var item in Model.Question_Page)
Your model is MainPage?
can you post that model here as well?

Answer 2

assume that GetAllStudents() return IEnumerable<Student>
in your controller
return View(new StudentService().GetAllStudents());
the actual Model send to View is IEnumerable<Student>
if you need IEnumerable<Core.Model.MainPage> as Model just return proper objects from your controller
IEnumerable<Core.Model.MainPage> model = //... define function that return Enumerable MainPage
return View(model);

Answer 3

If You want to use the same model on different views
public ActionResult Index()
{
//I am assuming, You are returning IEnumerable<MainClass>
List<MainClass> mainClass=new StudentService().GetAllStudents();
if(mainClass==null)
mainClass=new List<MainClass>(); //Incase you are not checking null value return
return View(mainClass); //return a none null IEnumerable<MainClass> object
}
[HttpPost]
public ActionResult Index(Question_Page question,string textID)
{
question.Question_name = textID;
question.Created_Date = DateTime.Now;
question.Modified_Date = DateTime.Now;
question.Created_By = 101;
question.Modified_By = 101;
new StudentService().SaveOrUpdateStudent(question);
return View(new StudentService().GetAllStudents());
}
Once your first controller method works, you will need to work on binding your model, for the second post method to work.

Answer 4

try viewModel. A model that have references to your desired model. so if a view is bound to your view model, then all the models referenced in the ViewModel will also get bonded.