0x8000000a - JavaScript runtime error: The data necessary to complete this operation is not yet available

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I have been experiencing the error (in the title) and have been trying to find an answer. The best one so far is AJAX Error: The data necessary to complete this operation is unavailable.

However, in that case, the OP was specifically using jQuery/Ajax, but I am using the AjaxControlToolkit and I am not sure how to implement the answer and was hoping someone may be able to help.

FYI: In most of the questions on the subject all say that the problem does not exist in Chrome/Firefox etc. (and it does when I try), but I am using IE (as its company policy) and am running IE 10 on Windows 8, using Visual Studio 2013

EDIT - Added code.

Very simple, but gives the error.

Webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="HotTransferBags.WebForm1" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"></asp:ToolkitScriptManager>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
                    <asp:ListItem Text="Item 1" Value="1" />
                    <asp:ListItem Text="Item 2" Value="2" />
                    <asp:ListItem Text="Item 3" Value="3" />
                    <asp:ListItem Text="Item 4" Value="4" />
                    <asp:ListItem Text="Item 5" Value="5" />
                </asp:DropDownList>

                <asp:TextBox runat="server" ID="TextBox1" />
            </ContentTemplate>
        </asp:UpdatePanel>
    </div>
    </form>
</body>
</html>

Code Behind - Webform1.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace HotTransferBags
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            TextBox1.Text = "You selected " + DropDownList1.SelectedItem.Text;
        }
    }
}

Error reported in Visual Studio...

As this is a simple form, only one error is reported, but my full application lists about 20 of them

JavaScript Error in Visual Studio Error List Window

jquery
ajax
ajaxcontroltoolkit
asked on Stack Overflow Feb 4, 2014 by Chris Hammond • edited May 23, 2017 by Community

0 Answers

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