How can I access an IFRAME from the codebehind file in ASP.NET?

Question

I am trying to set attributes for an IFRAME html control from the code-behind aspx.cs file.

I came across a post that says you can use FindControl to find the non-as

Answer 1

Where is your iframe embedded?

Having this code

I can access with iFrame1.Attributes["src"] just to iFrame1 and not to iFrame2.

Alternatively, you can access to any element in your form with:

FindControl("iFrame2") as System.Web.UI.HtmlControls.HtmlGenericControl