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POModels and Listboxes
 

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    <p>Ok so i'm trying to use a viewmodel with a list box such that when i add items to the listbox and then post the form, those items are carried over through the viewmodel to the action.</p> <p>ViewModel:</p> <pre><code>public virtual ICollection&lt;Sku&gt; Skus { get; set; } //This is this items sku's public virtual ICollection&lt;Sku&gt; AllSkus { get; set; } //This is all sku's </code></pre> <p>My Listbox looks like this: </p> <pre><code>@Html.ListBoxFor(m=&gt;m.Skus, new MultiSelectList(Model.Skus, "Id", "Name"), new { id = "skuList", style="width: 200px; height: 100px" }) </code></pre> <p>I have a table full of all skus that when i select one, it adds to the list box using jquery. (I'll post all that code below)</p> <p>My receiving action (skus is null):</p> <pre><code> [HttpPost] public ActionResult AddProductOffering(ProductOfferingModel model) { return View(model); } </code></pre> <p>The items are adding to the listbox just fine, however the model is still null after the post.</p> <p>Clearly i am just updating the listbox and not the model, i do not know how to tie the two together in this way.</p> <p>Any help would be much appreciated, thank you!</p> <p>(Updated) Full .cshtml file:</p> <pre><code>@using Web.ControlPanel.Helpers @model Web.ControlPanel.ViewModels.Offering.ProductOfferingModel @using (Html.BeginForm()) { &lt;h2&gt;Product Offering&lt;/h2&gt; &lt;br /&gt; @Html.LabelFor(m =&gt; m.Name) @Html.EditorFor(m =&gt; m.Name) &lt;br /&gt; &lt;br /&gt; &lt;label&gt;Offerings Skus&lt;/label&gt;&lt;br/&gt; @Html.ListBoxFor(m=&gt;m.Skus, new MultiSelectList(Model.Skus, "Id", "Name"), new { id = "skuList", style="width: 200px; height: 100px" }) &lt;br/&gt;&lt;br/&gt; &lt;button class="button" type="submit" value="Save"&gt;Save&lt;/button&gt; &lt;br/&gt;&lt;br/&gt;&lt;br/&gt; &lt;h3&gt;All Skus&lt;/h3&gt; &lt;p&gt; Search: @Html.TextBox("skuFilter") &lt;input type="submit" value="Search Skus" name="search" /&gt; &lt;/p&gt; &lt;table class="onepx" style="width: 80%"&gt; &lt;tr&gt; &lt;td colspan="4" style="text-align: right;"&gt; @Html.Pager("List", Model.SkuPager, 3, (string)ViewBag.SkuFilter) &lt;/td&gt; &lt;/tr&gt; &lt;thead&gt; &lt;tr style="font-weight: bold;"&gt; &lt;td&gt;Product&lt;/td&gt; &lt;td&gt;Sku&lt;/td&gt; &lt;td&gt;List Price&lt;/td&gt; &lt;td&gt;MSRP&lt;/td&gt; &lt;td&gt;Action&lt;/td&gt; &lt;/tr&gt; &lt;/thead&gt; &lt;tbody&gt; @if (Model.Skus != null) { foreach (var sku in Model.AllSkus) { &lt;tr&gt; &lt;td&gt; @Html.DisplayFor(m =&gt; sku.Product.Name) &lt;/td&gt; &lt;td&gt; &lt;label id="skuName@(sku.Id)"&gt;@sku.Name&lt;/label&gt; &lt;/td&gt; &lt;td&gt;$@Html.DisplayFor(m =&gt; sku.ListPrice) &lt;/td&gt; &lt;td&gt;$@Html.DisplayFor(m =&gt; sku.Msrp) &lt;/td&gt; &lt;td&gt; &lt;a href="#" class="AddSku" id="addSku@(sku.Id)"&gt;Add To Offering&lt;/a&gt; &lt;/td&gt; &lt;/tr&gt; } } &lt;/tbody&gt; &lt;tfoot&gt; &lt;tr&gt; &lt;td colspan="4" style="text-align: right;"&gt; @Html.Pager("List", Model.SkuPager, 3, (string)ViewBag.SkuFilter) &lt;/td&gt; &lt;/tr&gt; &lt;/tfoot&gt; &lt;/table&gt; } @section Scripts { &lt;script&gt; $(document).ready(function() { //Array of skus var skus = new Array(); $('.AddSku').click(function(e) { e.preventDefault(); var id = e.target.id.replace("addSku", ""); var exists = false; for (var i = 0; i &lt; skus.length; i++) { if (skus[i] == id) { exists = true; } } if (!exists) { var name = $("#skuName" + id).text(); $('#skuList').append('&lt;option value=' + id + '&gt;' + name + '&lt;/option&gt;'); skus.push(id); } }); }); &lt;/script&gt; } </code></pre>
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