MVC3 IPagedList in ViewModel - asp.net-mvc-3

Question

I want to have a page that has a form on the top of the page to enter movies in a system, and on the bottom of the page I want to have a table to display all of the movies in inventory. I am getting an error saying: Value cannot be less than 1. Parameter name: Page Size.
I have a viewmodel that currently looks like this:
public class InventoryViewModel
{
public Inventory Inventory { get; set; }
public IPagedList<Inventory> InventoryList { get; set; }
}
In my controller I have:
public ActionResult Index(int? page)
{
ViewBag.MoviesList = new SelectList(inventoryRepository.Movies, "MovieId", "Title");
InventoryViewModel vm = new InventoryViewModel
{
Inventory = new Inventory(),
InventoryList = inventoryRepository.GetInventory.ToPagedList(page.HasValue ? page.Value - 1 : 0, defaultPageSize)
};
return View(vm);
}
In my view I have:
<div class="well">
<h4>Enter Movie in System:</h4>
#using (Html.BeginForm()) {
#Html.ValidationSummary(true, "Movie was not entered in system. Please correct the errors and try again.")
<div>
<div class="input-prepend">
<span class="add-on"><i class="icon-film"></i></span>
#Html.DropDownListFor(m => m.Inventory.MoviesId, (SelectList)ViewBag.MoviesList)
#Html.ValidationMessageFor(m => m.Inventory)
</div>
<div class="input-prepend">
<span class="add-on"><i class="icon-calendar"></i></span>
#Html.TextBox("Quantity")
</div>
<p><button class="btn btn-primary" type="submit" value="Submit">Submit</button></p>
#Html.ValidationSummary()
</div>
}
</div>
<div>
<h3>Current Inventory:</h3>
</div>
<table class="table table-bordered table-hover">
<thead>
<tr>
<th style="width: 15%;">Checkout Number</th>
<th style="width: 15%;">Title</th>
<th style="width: 23%;">Availability</th>
<th style="width: 17%;"></th>
</tr>
</thead>
<tbody>
#foreach (var vm in Model.InventoryList.OrderBy(m => m.CheckoutNum))
{
<tr>
<td>#vm.CheckoutNum</td>
<td>#vm.Movies.Title</td>
<td>#vm.isAvail</td>
<td>
</td>
</tr>
}
</tbody>
<tfoot>
<tr>
<td colspan="4">
#Html.Pager(Model.InventoryList.PageSize, Model.InventoryList.PageNumber, Model.InventoryList.TotalItemCount).Options(o => o
.DisplayTemplate("BootstrapPagination").RouteValues(new { q = ViewBag.Query, area = "" } )
.AlwaysAddFirstPageNumber().MaxNrOfPages(5))
</td>
</tr>
</tfoot>
</table>

Answer 1

I figured it out. I was setting the defaultPageSize in the wrong constructor, so the variable was never getting set, causing the page size to be 0.
int defaultPageSize;
private IInventoryRepository inventoryRepository;
public InventoryController()
{
this.inventoryRepository = new InventoryRepository(new MovieContext());
this.defaultPageSize = Convert.ToInt32(System.Configuration.ConfigurationManager.AppSettings["defaultPageSize"]);
}
public InventoryController(IInventoryRepository inventoryRepository)
{
this.inventoryRepository = inventoryRepository;
this.defaultPageSize = Convert.ToInt32(System.Configuration.ConfigurationManager.AppSettings["defaultPageSize"]);
}