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    copied!<p>When using AJAX.NET I always make the input parameter just a plain old object and then use the javascript deserializer to covert it to whatever type I want. At least that way you can debug and see what type of object the web method in is recieving.</p> <p>You need to convert your object to a string when using jQuery</p> <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" &gt; &lt;head runat="server"&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="form1" runat="server"&gt; &lt;asp:ScriptManager ID="sm" runat="server" EnablePageMethods="true"&gt; &lt;Scripts&gt; &lt;asp:ScriptReference Path="~/js/jquery.js" /&gt; &lt;/Scripts&gt; &lt;/asp:ScriptManager&gt; &lt;div&gt;&lt;/div&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; &lt;script type="text/javascript" language="javascript"&gt; var items = [{ compId: "1", formId: "531" }, { compId: "2", formId: "77" }, { compId: "3", formId: "99" }, { status: "2", statusId: "8" }, { name: "Value", value: "myValue"}]; //Using Ajax.Net Method PageMethods.SubmitItems(items, function(response) { var results = response.d; }, function(msg) { alert(msg.d) }, null); //using jQuery ajax Method var options = { error: function(msg) { alert(msg.d); }, type: "POST", url: "WebForm1.aspx/SubmitItems", data: {"items":items.toString()}, // array to string fixes it * contentType: "application/json; charset=utf-8", dataType: "json", async: false, success: function(response) { var results = response.d; } }; jQuery.ajax(options); &lt;/script&gt; </code></pre> <p>And the Code Behind</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Services; using System.Web.Script.Serialization; using System.Web.Script.Services; using System.Web.UI; using System.Web.UI.WebControls; namespace CustomEquip { [ScriptService] public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } [WebMethod] public static void SubmitItems(object items) { //break point here List&lt;object&gt; lstItems = new JavaScriptSerializer().ConvertToType&lt;List&lt;object&gt;&gt;(items); } } } </code></pre>
 

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