Referencing a control on a different page

[dana lees]

Hello,

I am developing a c# asp.net application. I have 2 forms.

In the first webform ('header') i have a label.
I want to reference that label from a different form ('user'), in order to
change its' text.

How can i do that?

Thank you,
Dana

 

[Peter Rilling]

You cannot simply access other pages without actually transferring control
to that second page. Each page is self-contained.

The real question is, why would you need to change the text on the second
page that will not be displayed during the current page request?

 

[dana lees]

On 'header' i have a label that shows the number of current users in the
system.
On 'User.aspx' i can add or delete a user and then i would like to refresh
the label on the first page because the number of users on it is no longer
valid...

 

[Peter Rilling]

Such information should be saved in an application variable or in an
external file or database that will be read when the header loads and is
displayed.

 

[dana lees]

So i have to reload header every time i add/delete a user?
How do i reload it from a different form?

 

[Peter Rilling]

Okay, I am confused. What is the header? Is is a user control or a page in
an iframe or what?

Pages are always reloaded when a request is made to the server. Not sure
what you mean by "reload header every time".

 

[dana lees]

"Header" is a webform in which i want to include a user control, called
"numUsers".

The control i have created is called: "numUsers.ascx"

In order to user it in "Header.aspx", i have added the following code:

<%@ Register TagPrefix="uc1" TagName="numUsers" Src="numUsers.ascx" %>
<uc1:numUsers id="NumUsers1" runat="server"></uc1:numUsers>

In order to call setLabel() function in header.aspx.cs file, i have used:

numUsers ctrl = new numUsers();
ctrl = (numUsers)Page.FindControl("NumUsers1");
ctrl.setLabel("dana");

When debugging, i see that i do enter setLabel() function and set the label
to "dana" but then i enter Page_Load and the label is empty again.