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Javascript Error in IE11 with Decoration of Select Control

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FormDecorator

This is a migrated thread and some comments may be shown as answers.

Jay asked on 08 Nov 2017, 02:10 AM

We are seeing a JavaScript error when we select an Option in a Select control with a ASP Postback on IE11 via keyboard input.

<%@ Page Language="C#" AutoEventWireup="true" Inherits="System.Web.UI.Page" %>

<script runat="server">

void Page_Load(object sender, EventArgs e)

{

decorator.DecoratedControls = FormDecoratorDecoratedControls.Select;

}

</script>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head>

<title>DD Test Page</title>

</head>

<body>

<form id="DialogForm" runat="server">

<telerik:RadScriptManager runat="server" />

<telerik:RadAjaxManager runat="server" />

<telerik:RadFormDecorator ID="decorator" runat="server" DecorationZoneID="Panel1" EnableEmbeddedSkins="false" RenderMode="Lightweight" />

<telerik:RadAjaxPanel ID="Panel1" runat="server">

<asp:DropDownList ID="DD1" runat="server" AutoPostBack="true">

<asp:ListItem Text="[Select]" Value="" />

<asp:ListItem Text="T1" Value="1" />

<asp:ListItem Text="T2" Value="2" />

</asp:DropDownList>

<asp:Button runat="server" Text="Refresh" />

</telerik:RadAjaxPanel>

</form>

</body>

</html>

Reproduce by clicking the DropDown control, and then pressing 'T', and then clicking on a blank section of the page.

Do any workarounds exist for avoiding this error?

1 Answer, 1 is accepted

answered on 10 Nov 2017, 04:30 PM

Hello Jay,

I was able to reproduce the Unable to get property 'dispatchEvent' of undefined or null reference? error. Unfortunately I wasn't able to find a workaround for it different from removing the AutoPostBack="true" of the dropdown control.

I logged it for fixing in our bug tracking system and updated your Telerik points.

Best regards,
Rumen
Progress Telerik

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