How to get content from dynamically added controls
<p>This is how my web page looks like:
<img src="http://i.stack.imgur.com/dMVBt.png" alt="enter image description here"></p>

<p><strong>PosisionDataView</strong> is a web user control, which contains textboxes for product name and note plus some additional controls.</p>

<p><strong>QuantityView</strong> is also a web user control, which contains textboxes for quantity and price plus some additional controls.</p>

<p>The user can dynamically add QuantityView's and PositionView's to the page. This happens this way:</p>

<ul>
<li>The user clicks the ButtonAddQuantityView or ButtonAddPositionView</li>
<li>jquery's ajax method is called, which calls a method on my web service, which returns QuantityView or PositionView in html format</li>
<li>the received control is appended to the QuantityPlaceholder or to PositionsPlaceholder</li>
</ul>

<p>This all works pretty smooth, but what is the best method to parse this mess after postback? For example the QuantityView contains the textbox txtQuantity and in Request.Form collection I get these values for quantities:</p>

<ul>
<li>ctl00$ContentPlaceHolder1$PositionView$ctl00$QuantityView$ctl00$txtQuantity: 1</li>
<li>ctl00$txtQuantity: 2,4</li>
<li>ctl00$QuantityView$ctl00$txtQuantity: 3</li>
</ul>

<p>In reallity position 1 contains quantities 1 and 2, and position 2 contains quantities 3 and 4, but the Request.Form is a mess...</p>
