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POImplementing a simple product dropdown in ASP.NET MVC
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  1. POImplementing a simple product dropdown in ASP.NET MVC
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    copied!<p>What are the different or best ways I can implement a simple product dropdown in ASP.NET MVC, that redirect the user to a new product when they pick from the dropdown ?</p> <p>I have currently have my primary mapping rule :</p> <pre><code> routes.MapRoute( "Product", "Products/{sku}", new { controller = "Products", action = "ViewProduct", sku = "1001" } ); </code></pre> <p>This allows me to enter a URL like this to view my product:</p> <pre><code>/Products/1002 </code></pre> <p>I have a dropdown on my page which represents a list of products, and allows you to select form the list. (The <code>sku</code> parameter is the same name as the parameter in my controller's ViewProduct method) :</p> <pre><code>&lt;% using (Html.BeginForm("ViewProduct", "Products")) { %&gt; &lt;%= Html.DropDownList("sku", ViewData.Model.ProductsList)%&gt; &lt;%= Html.SubmitButton() %&gt; &lt;!-- just using a button now since its easier --&gt; &lt;% } %&gt; </code></pre> <p>This form targets the 'ViewProduct' command that I have in my controller (which is a full view that renders a product's information page).</p> <p>The problem is that the HTML generated (when I view the HTML for <code>/Products/1002</code>) looks like this:</p> <pre><code>&lt;form action="/Products/1002" method="post"&gt; &lt;select id="sku" name="sku"&gt; &lt;option value="1003"&gt;Product 1003&lt;/option&gt; &lt;option value="1002"&gt;Product 1002&lt;/option&gt; &lt;option value="2001"&gt;Product 2001&lt;/option&gt; &lt;/select&gt; &lt;input type="submit" /&gt; &lt;/form&gt; </code></pre> <p>It has gone and created the action link based upon the <strong>current</strong> URL (i guess it really had no choice). The problem is that when my controller is called after clicking 'Submit' it just goes ahead and fetches product 1002 again - and doesnt get overridden by the 'sku' parameter from the form.</p> <p>Now, the actual value is available in <code>Request.Params["sku"]</code>, but obvously its a pretty horrible practice to go and try to get it from there.</p> <p>One extremely convoluted solution is as follows - create a different routing rule which hits a different controller method <code>RedirectProduct</code>.</p> <pre><code>routes.MapRoute( "Product Redirect", "Products/RedirectProduct", new { controller = "Products", action = "RedirectProduct" } ); </code></pre> <p>Then the action to my form can simply be :</p> <pre><code>&lt;% using (Html.BeginForm("RedirectProduct", "Products")) { %&gt; </code></pre> <p>This hits my controller method, which has access to 'sku' (the correct one I want that is coming from the form params). The controller method just redirects to /Products/XXX .</p> <pre><code>public ActionResult RedirectProduct(string sku) { return new RedirectResult("/Products/" + sku); } </code></pre> <p>I don't like this solution at all - but I wanted to at least present what I had so far. I dont like adding extra mapping rules like this, and having to create different action names when I really just have one.</p> <p>I'm sure theres 50 different ways I could do this -- hence me asking the question on stackoverflow -- to try and figure which is best. Unfortunately at this time the documentation for Forms handling for MVC that I've found is pretty simple.</p> <p>PS. I'm not primarily looking for a JQuery solution (I want to master 'pure MVC' first) but I'd welcome one.</p>
 

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