Passing values to code behind - ASP.NET

Korvanica · 29-08-2011 01:56PM #1

Ok so i have an ASCX user control on my page and need to pass values from this control to its code behind when a button is clicked.

What's the best way at going about doing this ?

I have some HiddenFields on the page already, do I need to perform a postback to be able to read them from code behind ?

Currently they update fine (by the javascript) but when it goes to the codebehind all the values are blank.

these are the required fields:

<asp:HiddenField ID="NoteDateStrField" runat=server/>

      <asp:HiddenField ID="NoteIDField" Value="0" runat=server/>

      <asp:HiddenField ID="NoteContentsField" runat=server/>

If a postback is necessary for the code behind to read these, how do I go about doing it? Do I postback to the ascx file itself? Or is it necessary to reload the whole aspx file ?

Procasinator · 29-08-2011 02:51PM

If you don't want a full post back, you will have to use an Update Panel.

Have a look at this article for the basic full postback handling in user control:
http://msdn.microsoft.com/en-us/library/ms972975.aspx

Update panels in user controls also has an article:
http://msdn.microsoft.com/en-us/library/bb398780.aspx

mewso · 31-08-2011 11:07AM

It's not very clear to me where these controls are (the page aspx or the contorl ascx) although I assume they are on the aspx or you would easily access their values in the control's code behind. The overall picture of what you are trying to achieve here would probably make it easier to suggest solutions. Or alternatively use the proverbial lawnmower (update panel) to cut your hair (send values without postback) as suggested.

Korvanica · 31-08-2011 11:23AM

Got it sorted with the update panel, cheers for the replies!

Passing values to code behind - ASP.NET

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