Click here to Skip to main content
12,759,971 members (32,207 online)

Web user Control post back issue

saad.raza asked:

Open original thread

I am creating a web user control which contains DropDown and TreeView if change the dropdown value the node is selected in tree control.

Page contains <cc1:scriptmanager xmlns:cc1="#unknown">

and web control use <asp:ToolkitScriptManager >

I got the error "Only one instance of a ScriptManager can be added to the page"

if I remove <asp:ToolkitScriptManager >from web user control then page is post back.

How can i stop the post back when change the dropdown value in web user control?
Tags: C#, ASP.NET


When answering a question please:
  1. Read the question carefully.
  2. Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
  3. If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Let's work to help developers, not make them feel stupid.
Please note that all posts will be submitted under the The Code Project Open License (CPOL).

Advertise | Privacy | Mobile
Web02 | 2.8.170217.1 | Last Updated 26 Mar 2009
Copyright © CodeProject, 1999-2017
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100