Last Updated: 23 Nov 2015 10:52 by ADMIN
There are several ways to work around this:
1) disable autosizing (set AutoSize to false)
2) move the RadWindow after autoziging finishes (see attached example for a demo):
			function OnClientAutoSizeEnd(sender, args)
				var wndBounds = sender.getWindowBounds();
				//this is the case when the viewport is not sufficient for the RadWindow
				//so the RadWindow is as tall as the viewport
				if (wndBounds.height == $telerik.getClientBounds().height)
					sender.moveTo(wndBounds.x - 9);

3) avoid autosizing for the subsequent page loads in the content page.
This can be done by setting AutoSize to false and additionally the following function attached to the OnClientPageLoad event will provide autosizing for the first load without positioning issues:
 			function OnClientPageLoad(sender, args)
				if (!sender.hasBeenShown)
					sender.hasBeenShown = true;

4)  use partial postbacks in the content page so that it is not fully reloaded and the autosizing logic is not fired again automatically.
Last Updated: 08 Jun 2016 14:53 by ADMIN
Currently the video does not play, only audio is heard. If autosizing is disabled the video functions properly.
A possible workaround is to disable autosizing and manually call the autosize() method when the page is loaded for all other browsers:

<telerik:RadWindow runat="server" ID="rw1" VisibleOnPageLoad="true" NavigateUrl="PlayVideo.aspx"
    AutoSize="false" Width="700" Height="500" OnClientPageLoad="OnClientPageLoad">


function OnClientPageLoad(sender, args)
    setTimeout(function ()
        if (!$telerik.isMobileSafari)
    }, 0);
Last Updated: 27 Jun 2016 08:45 by Tonino
This is related to a browser bug in accessing the document.activeElement property inside an iframe under IE9 and IE10.

See this KB article for additional information and examples: .

There are several possible workarounds:
1) remove the Modal feature.
2) Replace the opening logic with the one from this thread ( ) and add a small timeout before showing the RadWindow. Even 0ms could suffice so the browser has an active element
3) Replace the RadAjaxPanel with an ASP UpdatePanel with UpdateMode set to Conditional
4) Add a function that will provide a focused element and call it in the OnClientBeforeShow event of the RadWindow
5) Add that function and call it in the ResponseScripts of the RadAjaxPanel
 The function could look like this: function fixIE() { document.documentElement.focus();} where, of course, you can focus some other element on the page.

A sample is attached.
Last Updated: 21 Mar 2014 16:54 by ADMIN
A ShowOnTopWhenModal property would have the effect that any modal RadWindow (Modal=true) will increase greatly its z-index, just like it does when it is maximized. This property should take precedence over a maximized RadWindow (i.e. it should increase the z-index to more than 100 000).

A possible workaround:

    .topWindow {
        z-index: 100001 !important;

for a markup of:
<telerik:RadWindow ID="topWindow" runat="server"
Last Updated: 08 Jan 2016 14:26 by ADMIN
Last Updated: 18 Mar 2015 06:08 by ADMIN
Last Updated: 16 Apr 2015 15:20 by Elena
Last Updated: 13 Oct 2014 14:25 by ADMIN
Last Updated: 11 Dec 2014 09:29 by ADMIN
Created by: Georgi Tunev
Comments: 0
Category: Window
Type: Feature Request
The desired effect can be achieved easily with CSS and this approach will even allow for finer tuning of the desired effect.

The RadWindpw's ContentTemplate is a simple div element that has dimensions set in pixels by the RadWindow scripts, so you can control the way its contents flow just like any other generic div element on your page. Below follows an example.

In case an external page is loaded in the RadWindow (e.g., via the NavigateUrl property), it will be loaded with an iframe that has its width and height set to 100% of the RadWIndow content area. Thus, it is up to the content page to control its scrolling.

<%--A sample RadWindow declaration you can use for quick testing--%>
<telerik:RadWindow ID="RadWindow1" runat="server" VisibleOnPageLoad="true">
		<div class="desiredOverflow">
			Add your content here
			<div style="height: 1000px; width: 1000px; background-color: yellow;">
				some dummy content so you can test out the overflow CSS rules behavior

/* some sample CSS that you can use to control the scrolling behavior of your content */
	width: 100%;
	height: 100%;
	margin: 0;
	padding: 0;
	overflow: scroll; /* set the desired value here */
	/* you can also use the other overflow rules for fine control */
	overflow-x: hidden; /* set the desired value here */
	overflow-y: scroll; /* set the desired value here */
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