Error: Only one instance of a ScriptManager can be added to the page

Question

I got this Error when I added ScriptManager on a "Site.Master" (Master Page)

All child webForm of site.Master that contains ScriptManager. produce this error.....

Only one instance of a ScriptManager can be added to the page.

help Thanks

score 1 · Answer 1 · answered Nov 19 '13 at 06:50

1

You probably have another instance of in one of the pages /user controls that inherits from this master page.

answered Nov 19 '13 at 06:50

Shai Aharoni

I use updatepanel to content page. and the update panel need scriptmanager – Ching Chang Chung Nov 19 '13 at 07:02

score 1 · Accepted Answer · answered Nov 19 '13 at 07:03

1

use a ScriptManagerProxy on your child pages/user controls

answered Nov 19 '13 at 07:03

Kev

it also produce error The control with ID 'ScriptManagerProxy1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it. – Ching Chang Chung Nov 19 '13 at 07:17
also, check your script manager on the master page is above your content placeholders – Kev Nov 19 '13 at 07:22
I Solve it already, the script manager of masterpage must be on top thank – Ching Chang Chung Nov 19 '13 at 07:31

2 Answers2