Why this javascript code gives error

Question

It gives the following error

The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)

My code is

  __doPostBack('<%= btnExitChatRoom.ClientID %>', '');

Where is your Javascript code? – Krish R Nov 13 '13 at 09:53 — Krish R, Nov 13 '13 at 09:53

score 0 · Answer 1 · answered Nov 13 '13 at 10:05

0

The error does not come from that Javascript code per se. The code behind your page is trying to add or remove controls from a container that includes code blocks (<%= btnExitChatRoom.ClientID %> in your case), and ASP.NET cannot do that.

You can work around this problem by using a data binding expression:

__doPostBack('<%# btnExitChatRoom.ClientID %>', '');

Then explicitly calling the DataBind() method of the container from your code-behind.

answered Nov 13 '13 at 10:05

Frédéric Hamidi

258,201
41
486
479

I want to call btnExitChatRoom click Event every 4 second but it's not happening using your code – Mangal Pandey Nov 13 '13 at 10:14
@Mangal, that's strange. It should, unless you forgot to call `DataBind()` from the code-behind. – Frédéric Hamidi Nov 13 '13 at 10:17

score 0 · Answer 2 · answered Nov 13 '13 at 10:06

0

If you don't want to databind then take this code out of the header and put it just before the element closes

answered Nov 13 '13 at 10:06

Ben

1,913
15
16

Why this javascript code gives error

2 Answers2