Accessing value of a hidden field on Masterpage from codebehind

Question

In a follow up to my previous question, I want to get the value of the hidden input field from the child page codebehind.

I tried HtmlInputHidden hdnID = (H

Answer 1

So change it FROM

HtmlInputHidden hdnID = (HtmlInputHidden)Page.Master.FindControl("ctl00_hdnField");

TO

HiddenField hdnID = (HiddenField)Page.Master.FindControl("hdnField");

It's just a casting thing - notice HtmlInputHidden changed to HiddenField. You also don't need the ct100_ part - this is just so the HTML rendered element has a unique ID.

The control on your page is an asp.net control, not a generic HTML control.

You would use HtmlInputHidden if you put a generic in your HTML.