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DotNetNuke Forums
 
  Forum  DotNetNuke® Pro...  ClientAPI Compo...  Tab Strip Control - register a postbackevent
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New Post 6/9/2007 11:52 PM
User is offline Christos Christodoulou
17 posts
10th Ranked


Tab Strip Control - register a postbackevent 

Hello,

I'm using the tab strip control, and i want to find out how i can fire a postback by registering it before loading the tab.

I tried these lines of code to register a postbackevent

line 1: dim deleg as New DotNetNuke.UI.Utilities.ClientAPIPostBackControl.PostBackEvent(AddressOf Dummy_Function)
line 2: DotNetNuke.UI.Utilities.ClientAPI.RegisterPostBackEventHandler(dummy_Control, "dummy", deleg, False)

But i get this error: "Object reference not set to an instance of an object."

with stack trace: at DotNetNuke.UI.Utilities.ClientAPI.RegisterClientVariable(Page objPage, String strVar, String strValue, Boolean blnOverwrite) at DotNetNuke.UI.Utilities.ClientAPI.RegisterPostBackEventHandler(Control objParent, String strEventName, PostBackEvent objDelegate, Boolean blnMultipleHandlers) at Dummyform.Dummy_Tab_SetupDefaults()

I'm really new to this, if someone can point to me to the right direction i would appreciate it

Thanks in advance
 
New Post 6/11/2007 11:34 AM
User is offline Jon Henning
1622 posts
www.codeendeavors.com
5th Ranked










Re: Tab Strip Control - register a postbackevent 

I am confused as to what you are trying to solve.   It sounds like you want a callback to occur, before a tab loads.  Are you using the DNN TabStrip or another control.  If DNNTabstrip, what rendering mode are you using?  If I had to take a guess at your error, I'd say you are calling the registerpostbackeventhandler before teh dummy_control is attached to the page.  For more information see the following links.

This document covers the DNNTabstrip.

This document covers client callbacks.
 
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