Ajax POST Data not being sent to the Page_Load method in ASP.NET
<p>I am basically trying to send some test values from my javascript function to the Page_Load method in my ASP.NET Web Forms page. </p>

<p>However, when debugged I noticed that the Request data are null and <strong>does not go through the condition</strong>.</p>

<p>Code:</p>

<p><strong>test.aspx</strong></p>

<pre><code>&lt;form id="form1" runat="server"&gt;
        &lt;div&gt;
            &lt;input type="button" onclick="senddata()" /&gt;
        &lt;/div&gt;
        &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"&gt;&lt;/script&gt;
        &lt;script&gt;
            function senddata() {
                var testdata = "checkcheck";

                $.ajax({
                    type: 'POST',
                    url: '/test.aspx',
                    data: { "data": testdata},
                    success: function (msg) {
                        console.log(msg);
                    }
                });
            }
        &lt;/script&gt;
&lt;/form&gt;
</code></pre>

<p><strong>Code Behind:</strong></p>

<pre><code>protected void Page_Load(object sender, EventArgs e)
{
    //doesn't go beyond this when I click the button
    if (!string.IsNullOrEmpty(Request.Form["data"]))
    {
        string resp = "working";
        Response.Write(resp );
        Response.End();
        return;
    }
}
</code></pre>

<p>Any idea why the data is not received from the code behind? It's a very simple example and I am wondering why.</p>