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POEmpty List When Data Is Posted To Action Method (ASP .Net MVC)
 

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  1. POEmpty List When Data Is Posted To Action Method (ASP .Net MVC)
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    <p>I have got a problem with submitting data to Post method.</p> <p>I have a class similar to this:</p> <pre><code>public class A { public int Id{get; set;} public string Name{get; set;} public List&lt;B&gt; Bs {get; set;} } </code></pre> <p>In the View I have a list of Bs object that I can add to the Bs property of class A without any problem. I can see the result without any problem in my Razor View as well.</p> <p>The problem occurs when I post the final result to my Add Action Method to save them in my database.</p> <p>When the final object is sent to my Action method the Bs property is completely empty. So what I did instead was to add that collection to a TempData dictionary and retrieved it in my Add Action method.</p> <p>My question is simple why is my Bs property empty when its posted to my Edit action method ? The reason why I ask this is because in my AddBs action method I add my Bs to my Model and send it back to View and everything is find up to that point.</p> <p>Edit: @SLaks</p> <p>This is the code I have in my View :</p> <p>&lt;% using (Html.BeginForm("Create", "A")) { %> &lt;%: Html.ValidationSummary(true) %> </p> <pre><code> &lt;div class="editor-label"&gt; &lt;%: Html.LabelFor(model =&gt; model.Name) %&gt; &lt;/div&gt; &lt;div class="editor-field"&gt; &lt;%: Html.EditorFor(model =&gt; model.Name) %&gt; &lt;%: Html.ValidationMessageFor(model =&gt; model.Name) %&gt; &lt;/div&gt; &lt;% if (Model.Bs.Any()) { %&gt; &lt;h3&gt;B List&lt;/h3&gt; &lt;%= Html.Telerik().Grid(Model.Bs) .Name("CheckedOrders") .Columns(columns =&gt; { columns.Bound(d =&gt; d.Id).Width(100); columns.Bound(d =&gt; d.Name).Width(300); }) .Footer(false) %&gt; &lt;% } %&gt; &lt;br /&gt; &lt;p&gt; &lt;input type="submit" value="Create" /&gt; &lt;/p&gt; &lt;/fieldset&gt; &lt;% } %&gt; </code></pre> <hr> <pre><code>This is the HTML generated: &lt;form action="/Admin/BusinessType/Create" method="post"&gt; &lt;fieldset&gt; &lt;div class="editor-label"&gt; &lt;label for="Name"&gt;Name&lt;/label&gt; &lt;/div&gt; &lt;div class="editor-field"&gt; &lt;input class="text-box single-line" id="Name" name="Name" type="text" value="" /&gt; &lt;span class="field-validation-valid" data-valmsg-for="Name" data-valmsg-replace="true"&gt;&lt;/span&gt; &lt;/div&gt; &lt;div class="t-widget t-grid" id="CheckedOrders"&gt;&lt;table cellspacing="0"&gt;&lt;colgroup&gt;&lt;col style="width:100px" /&gt;&lt;col style="width:300px" /&gt;&lt;/colgroup&gt;&lt;thead class="t-grid-header"&gt;&lt;tr&gt;&lt;th class="t-header" scope="col"&gt;Id&lt;/th&gt;&lt;th class="t-last-header t-header" scope="col"&gt;Name&lt;/th&gt;&lt;/tr&gt;&lt;/thead&gt;&lt;tbody&gt;&lt;tr&gt;&lt;td&gt;2&lt;/td&gt;&lt;td class="t-last"&gt;Heeey&lt;/td&gt;&lt;/tr&gt;&lt;tr class="t-alt"&gt;&lt;td&gt;3&lt;/td&gt;&lt;td class="t-last"&gt;Testtttt&lt;/td&gt;&lt;/tr&gt;&lt;/tbody&gt;&lt;/table&gt;&lt;/div&gt; &lt;br /&gt; &lt;p&gt; &lt;input type="submit" value="Create" /&gt; &lt;/p&gt; &lt;/fieldset&gt; &lt;/form&gt; </code></pre> <p>The Code above shows perfectly fine in my Browser, I can even see the Bs list, but when I type a Name And Click on Create, the Bs list is empty.</p>
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    1. COWhat names does it give to the controls Grid produces?
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    2. CO@Rob I have added the generated HTML to the question.
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    3. COLooking at the HTML there doesn't seem to be any form controls generated for the Bs elements (so none can get posted back). You can always tell if there is a chance of the values being used by looking at Request.Form and Request.QueryString in your action method.
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      1. USRob
 

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