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I am working on Framework 4.5 and i am testing some ajax controls. If I add some ajax controls in the page then while loading the page am getting the following Error. I did give the ajax control reference in the Bin Directory. Below is the Error.

Unhandled exception at line 4620, column 12 in http://localhost:5323/ScriptResource.axd?d=yeSNAJTOPtPimTGCAo3LlT21_RZRtC9W-I9soDKgG4JbtuyIkuDd3c1L6-d90Nt9QJT_Ncpu3SEQY41BIhzB8-Ss8P_bfRky6yfzMvtfs8JnLezGs6a119KiTDJzfpYy0&t=ffffffff9cf62cd3

0x800a139e - JavaScript runtime error: Sys.ArgumentUndefinedException: Value cannot be undefined.

This is my code:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit.HTMLEditor" tagprefix="cc1" %>

<!DOCTYPE html>

<html xmlns="">
<head runat="server">
    <form id="form1" runat="server">
        <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
        <cc1:Editor ID="Editor1"  runat="server" />
        <br />
Updated 22-Jan-14 21:21pm

1 solution

Close you ToolkitScriptManager tag!
<asp:toolkitscriptmanager id="ToolkitScriptManager1" runat="server" />
Share this answer
Robymon 23-Jan-14 5:02am    
Still showing the same eroor
Kornfeld Eliyahu Peter 23-Jan-14 5:11am    
OK. I took the code you posted - fixed the unclosed tag, and it works perfectly.
You may have some other codes/references around that cause the error?
Can you debug the JS to see where the error comes from?

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