__doPostBack is not defined

Question

Im getting that error when try to call a __doPostBack on one of my pages, every page that i have in the project use __doPostBack function but in this particular page im gett

Answer 1

Solution for my Problem: IIS ASP.NET Webforms generates web pages depending on user Agent string

My IIS had no definition for the IE11 browser so it defaulted to a very simple browser profile which doesn't even Support JavaScript.

• short term solution: run browser in compatibility mode.
• medium term solution: Deployment of .Net Framework 4.5.1 which contains IE11 browser profile definitions.

An alternative: set IE11 Browser definiton file

Answer 2

i used this method in my script that included to asp.net form:

main form id sample:
<script src="myscript" />

<form id="frmPost" runat="server">
</form>

// myscript.js in java script function
mypostboack: function () {
$('#frmPost').context.forms[0].submit()
}

Answer 3

Wrapping my server side controls in a form element with runat="server" attribute worked for me. According to asp environment there should be only one form element with runat="server" attribute in it otherwise some serious issue may happen.

<form runat="server" id="form1">
   <!-- Server side controls go here -->
</form>

Answer 4

Just add this code to your .aspx

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>

Answer 5

I had this problem just today, but none of the solutions I found worked, unfortunately including yours. So if someone reads this and it doesn't work for them try this

http://you.arenot.me/2010/11/03/asp-net-__dopostback-is-not-defined/

Cheers though for helping me through the process of working out what went wrong!

Answer 6

lnkDeactivate.Attributes("onclick") = ClientScript.GetPostbackClientHyperlink(lnkDeactivate, "deactivate")