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POCascading dropdown using asp.net mvc
 

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    <p>I have a dropdown for tradertype which on selection should populate the dropdown for traders. My view looks like : </p> <pre><code>`&lt;ul&gt; &lt;li&gt; &lt;label&gt; &lt;span class="mandatory"&gt;*&lt;/span&gt;Trader Type:&lt;/label&gt; &lt;%=Html.DropDownList("TraderType", (SelectList)ViewData["TraderType"])%&gt; &lt;%--&lt;select id="ddlTraderType" name="TraderType"&gt; &lt;%foreach (SelectListItem item in (SelectList)ViewData["TraderType"]) { %&gt; &lt;option value="&lt;%=item.Value %&gt;"&gt; &lt;%=item.Text %&gt;&lt;/option&gt; &lt;%} %&gt; &lt;/select&gt;--%&gt; &lt;span class="tagline"&gt;Select a Trader type from here&lt;strong&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/li&gt; &lt;li&gt; &lt;label&gt; &lt;span class="mandatory"&gt;*&lt;/span&gt;Trader:&lt;/label&gt; &lt;select name="Trader" id="Trader"&gt; &lt;/select&gt; &lt;span class="tagline"&gt;Select a Trader from here&lt;strong&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/li&gt; &lt;/ul&gt;` </code></pre> <p>I tried using JQuery, but I couldn't get the change event of the 'TraderType' dropdown. My script is: </p> <pre><code>$("TraderType").change(function() { alert("Change"); $.ajax({ url: $("#ListTraders").attr("action"), type: 'GET', contentType: "application/json; charset=utf-8", cache: false, data: { part: $("#TraderType").val() }, dataType: 'json', async: false, success: function(data) { if ((data.lstTraders.length) &gt; 0) { for (var count = 0; count &lt; data.lstTraders.length; count++) { $("#Trader").append("&lt;option value='" + data.lstTraders[count].Id.toString() + "'&gt;" + data.lstTraders[count].TraderName + "&lt;/option&gt;"); } } } }); }); </code></pre> <p>The code in the controller is: </p> <pre><code>public JsonResult ListTraders(string trdrTypeId) { IList&lt;HSTrader&gt; lstTraders = new List&lt;HSTrader&gt;(); Build objBld = new Build(); Document objDoc = new Document(); string message = string.Empty; bool result = true; try { int trdrType = Convert.ToInt32(trdrTypeId); lstTraders = objBld.GetTradersByTrdrTypeId(trdrType); } catch (Exception ex) { message = ex.Message; result = false; } return Json(new { Success = result, Message = message, lstTraders = lstTraders });} </code></pre> <p>Please help me on this. </p>
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