Get specific item from Repeater in code behind
<p>I have an ASP.NET WebForms project that displays data read from a database via a Repeater. The code for the repeater looks like this:</p>

<pre><code>&lt;asp:Repeater ID="repRMAproduct" runat="server"&gt;
     &lt;ItemTemplate&gt;
          &lt;tr&gt;
               &lt;td&gt;
                    &lt;%# Eval("Description") %&gt;
               &lt;/td&gt;
               &lt;td&gt;
                    &lt;%#  Eval("Qty") %&gt;
               &lt;/td&gt;
               &lt;td&gt;
                    &lt;asp:TextBox ID="tbNewQty" runat="server"&gt;&lt;/asp:TextBox&gt;
               &lt;/td&gt;
          &lt;/tr&gt;
     &lt;/ItemTemplate&gt;
&lt;/asp:Repeater&gt;
</code></pre>

<p>What I want is for the user to enter a new Quantity only on the rows that he wants to enter. Then, when he clicks the save button, I can read these new Quantities along with their associated Descriptions.</p>

<p>In MVC I should build the URL using jQuery and pass it to the Controller. But in WebForms it seems less intuitive. Where do I go from here? </p>