Hi,

I am using Master Page in my project.

In the content page (First.aspx) I placed a txt control called 'txtID'

In the First.aspx button click event (PostBackURL=Second.aspx) I am calling Second.aspx

In Second.aspx I am trying to access txtID value.

So, I wrote Request.Form("txtID") in Second.aspx page_load event.

Problem is I am unable to get txtID value with Request.Form("txtID")

I need to write Request.Form("ctl100$ContentPlaceHolder1$txtID") to get the value.

Why I need to append "ctl100$ContentPlaceHolder1$" to "txtID" to get the value?

Thanks

http://forums.asp.net/p/1134045/1810337.aspx Try this approach...

or this...

http://www.beansoftware.com/ASP.NET-Tutorials/Cross-Page-Posting.aspx specifically IsCrossPagePostBack Property.

Hi Roberts,

Thanks for the Links.

I just want to know, why I need to append "ctl100$contentplaceholder1", is there any specific reason for that?

Thanks

 it has something to with what the uniqueid of the control is set to durning the page_init method.  As an alternative you can use the CType(PreviousPage.FindControl("txtID"), TextBox).Text.

Hi,

Both the MasterPage and Content controls are naming containers. The key to using FindControl is to invoke the method on the correct container, because FindControl doesn’t recursively traverse the entire hierarchy of controls. FindControl only searches inside the current naming container.

A naming container also mangles its children’s ClientID property. Mangling ensures all ClientID properties are unique on a page. For instance, the ID for our Label control is “Label1”, but the ClientID of the Label is “ctl00_ContentPlaceHolder1_Label1”. Each level of naming container prepends it’s ID to the control (the MasterPage control ID in this form is ctl00).

Hope it helps.