Dynamically Created Textboxes Not Bound To Model

Question

My viewmodel contains a list of strings:

public class SupplierViewModel
{
    public Supplier Supplier { get; set; }
    public List<string> Numbers;
}

The user can add any number of strings in the view:

    <div class="editor-label">
        @Html.LabelFor(model => model.Numbers)
    </div>

    <div id="allNumbers">
        @for (int i = 0; i < Model.Numbers.Count; i++)
        {
        <div class="editor-label">
            @Html.TextBoxFor(m => m.Numbers[i])
        </div>
        }
    </div>

    <div id="newNumber" style="display:none;">
      <input type="text" name="Numbers[#]" style="display:block;" />
    </div>

    <button type="button" id="addNumber" >Add</button>

This is done on the client side with jquery:

var container = $('#allNumbers');
$('#addNumber').click(function () {
    var index = container.children().length;
    var clone = $('#newNumber').clone();
    clone.html($(clone).html().replace(/\[#\]/g, '[' + index + ']'));
    container.append(clone.html());
});

My problem is that none of the dynamically added strings are sent back to the controller even tough they are all named "Numbers[i]". What am I missing here?

Answer 1

Numbers is a field and the DefaultModelBinder cannot set the value of a field. You need to make it a property by adding getters/setters

public List<string> Numbers { get; set; }