AJAX :: Only One Instance Of A ScriptManager Can Be Added To Page
Jun 30, 2012
i use 2 file up load control in my page i used this code
<asp:ToolkitScriptManager ID="ToolKitScriptManager2" runat="server"></asp:ToolkitScriptManager>
<asp:UpdatePanel ID="Upbdt1" runat="server">
<ContentTemplate>
<asp:ModalPopupExtender DropShadow="true" ID="ModalPopupExtender1"
[code].....
I wrote these code twice in my page but when i run page this error occur..Only one instance of a ScriptManager can be added to the page. An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Â
Exception Details:Â System.InvalidOperationException: Only one instance of a ScriptManager can be added to the page.Source Error:Â An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
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Sep 25, 2010
I am obviously confused by ScriptManager and ToolKit. Can you look at the code below?
[Code]....
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May 13, 2010
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Stacktrace is:
[InvalidOperationException: Only one instance of a ScriptManager can be added to the page.]
System.Web.UI.ScriptManager.OnInit(EventArgs e) +384613
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Feb 8, 2011
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This throws the "You can only have 1 ScriptManager" exception.
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Mar 14, 2011
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May 7, 2015
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
I am using this with update panel it works fine.
Now i have added modal popup. Used ajax 15.1 toolkit. they said it doesnt require ajax script manager now.)
When i use it without ajaxscript manager it doesnt work. But when i use ajaxscript manager it works. But then i cant use scriptmanager (as two instance cant run).If i dont use script manager update panel wont work. Also i dont dont have any master page.
<cc1:ModalPopupExtender ID="mp1" runat="server" PopupControlID="Panel1" TargetControlID="btnShow"
CancelControlID="btnClose" BackgroundCssClass="modalBackground">
</cc1:ModalPopupExtender>
<cc1:ToolkitScriptManager ID="tksc" runat="server"></cc1:ToolkitScriptManager>
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Jan 14, 2011
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Mar 23, 2010
I'm trying to do the next steps:1 - Click in submit Button inside update panel to make some server work - Ok
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Confirm.aspx:
function confirmSubmit(buttonId, msg)
{
[code]...
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Feb 3, 2011
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However today the application started giving me error that there is no ScriptManager on the page although it's (I'm using AJAX ModalPopupExtender on 2 pages). I didn't change anything on the pages except yesterday I've added one ASCX control to both pages but problem doesn't disappear even if I remove the control.
Basically the thing stopped working for no particular reason. I will try to reinstall the AJAX toolkit and I think that there are maybe somethings to change in web config but it's strange since it worked perfectly until few hours ago.
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Dec 4, 2010
During development of my site, I have optimized for all the common browsers, including Chrome and it works fine when tested locally on my dev machine. However, I have found out that when put on my live dedicated server, the pages that are delivered to Chrome do not contain the AJAX scripts and for example the treeview, which should load its branches dynamically, renders in such a way that a full postback occures. This completely breaks the site in Chrome.
Considering all things I could deduce about the problem, I would suppose that I may need a newer version of MS AJAX that supports Chrome, but I cannot find any version older than Feb 2007 and anyway, Microsoft .NET Framework 3.5 SP1 is installed on the live server. That should contain the propper MS AJAX anyway, shuldn't it?
I've been researching this for more than a whole day now and cannot figure out what's wrong. I even matched and compared all settings of the site on IIS 7 on both my dev machine and the live server. Except a couple of, as far as I can say, unrelated additional entries on the live server, those are identical as well.
I tested using Fiddler that all the difference is made by the User-Agent request header. If I just add
[Code]....
behind the "Mozilla/5.0" bit, all is fine and I get response containing all it should. I suppose I could create a HTTP module that would add that bit to the mentioned header and then add that handler to the pipeline, but that would be an ugly solution, curing the effect, not the cause of the problem. And it may cause other problems in Chrome, too.
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I'm going to include few snippets of code to demonstrate the differences between the same page loaded in the same Chrome, but from two different sources - my dev machine's IIS (A) and from the live server (B). The applications running on both of these web servers are identical.
And the following shows the difference in generated HTML at the top of the <body> element:
A:
[Code]....
B:
[Code]....
There is still the typeof(Sys) === 'undefined' bit of code, which tells me that ScriptManager is still being loaded, but decides that other AJAX script should not be. But it does not even initialize itself so Sys is in fact undefined after the page is loaded.
There are also differences at the end of body:
A:
[Code]....
versus B:
[Code]....
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May 20, 2010
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Feb 27, 2010
I am reading a tutorial article on this site about Partial Rendering using ScriptManager.EnablePartialRendering - [URL] The article uses button_click to demonstrate Partial Rendering without full page reload. I copy exactly the same codes but everytime I click the button the page refreshes.
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Error seen when "viewing source":
(script src="/ScriptResource.axd?d=cN6E-bUIIAhb0PYSsbqev2ndhi3W3ltVtHjrJ-T5yBfO3jQBEHWjU39PLAybm-JIxwU4s59EhJFweLHmABl1zA2yo8fKhHYHGS7RTy1fhECuWqXbMMy5aCuSlqHbfp3advQcwp11SqaDwkvU1YN6Bw2&t=ffffffffbd2983fc" type="text/javascript")(/script)
(script type="text/javascript")
//(![CDATA[
if (typeof(Sys) === 'undefined') throw new Error('ASP.NET Ajax client-side framework failed to load.');
//]])
(/script)
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OnClientUploadComplete="onClientUploadComplete"
MaximumNumberOfFiles="10"
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[Code]....
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I have an web application of 200 web pages and all has a single master page. Most of the content pages use AJAX controls so most of content pages has its own ScriptManager. Now I have a requirement to add a link with HoverMenuExtender control and for that I need to put ScriptManager in the Master page, but it is working only in the content pages where there is not ScriptManager.
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StringBuilder jscode = new StringBuilder();
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jscode.AppendLine(@"function MyFunc(x) { {alert('hi'); }");
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[code]...
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I have a form which I am using the RoundedCornersExtender, If I am using the ScriptManager control I am getting the following error-Error: AjaxControlToolkit requires ASP.NET Ajax 4.0 scripts. Ensure the correct version of the scripts are referenced. If you are using an ASP.NET ScriptManager, switch to the ToolkitScriptManager in AjaxControlToolkit.dll.I googled it and found that one way to overcome this is to use the ToolkitScripyManager, I replaced the ScriptManager with the ToolkitScriptManager and I dont get the above error anymore. On this same form I am using an UpdatePanel control but from some reason I am not getting a partial render but always a full page render.
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Feb 8, 2011
Currently using Framework3.5 Ajax Dll-3.5 Pages included -MasterPage and 6-Default Page's myquery i m currently using Different Designing Interace for all the Default Page's means some of page's includes update panel and some not sly some page's include ajax toolkit tool's like -CascadingDropDown,UpdatePanel and Masked Edit Control do i need to
add scriptmanager in all the page's involving MasterPage?
add ScriptManager or ToolScriptManager in Master Page ?
add toolscriptmanager in masterpage and rest of page's using ajax controls and update panel
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Aug 4, 2010
I'm having a serious problem with my ASP.NET AJAX application.There is an javascript function in my application needs to be executed after the Timer_Tick event. Here's the code behind:
[Code]....
When I call the javascript function 'UpdateValue' for the first time(at onload page event), it works correctly. But after the Timer_Tick event, it does nothing. This is the HTML code:
[Code]....
What's the problem with the ScriptManager or the Timer_Tick event?
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Apr 22, 2010
I am trying to update a listbox on the server from javascript using Ajax PageMethods. How would I reference the listbox control inside the Shared Sub, I get Error 156 Cannot refer to an instance member of a class from within a shared method or shared member initializer without an explicit instance of the class. The reason I want to do it this way is because when I updated it on the client the code-behind did not have the updated count.
[Code]....
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Feb 9, 2010
I had this problem: I created a WebUserControl that used som Ajax stuff - hence it needed a ScriptManager.
The problem was that I couldn't add it to the WebUserControls html code (the .ascx file) since the WebUserControl sometimes was placed into a parent page that already had a ScriptManager, and I couldn't add a ScriptManagerProxy since the parent page sometimes didn't had a ScriptManager.
Alot of people just use a ScriptManager on the MasterPage, but this fails if: one doesn't use a MasterPage or one uses iFrames etc. that uses stand alone aspx pages, like Thickbox might do...
Here's the solution:
in the WebUserControls code behind (.cs file), put this:
protected override void OnInit(EventArgs e)
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May 31, 2010
Can you tell me why its necessery to include "ToolkitScriptManager" or "scriptmanager" when we use AJAX ?
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Sep 27, 2010
I just downloaded the latest (3.5.40412.0) version of Ajax Control Toolkit and in order to update the existing version, I have replaced <asp:ScriptManager with <ajaxtoolkit:ToolkitScriptManager. The page loads with an javascript error:
Error: $get("id of ToolkitScriptManager_hiddenfield") is null
Source File: https://localtest.dk/layouts/site.aspx?_tsm_hiddenfield_=sitesscriptmanager_hiddenfield&_tsm_combinedscripts_=%3b%3bajaxcontroltoolkit%2c+version%3d3.5.40412.0%2c+culture%3dneutral%2c+publickeytoken%3d28f01b0e84b6d53e%3aen-us%3a1547e793-5b7e-48fe-8490-03a375b13a33%3a475a4ef5%3aeffe2a26%3a1d3ed089%3a5546a2b%3a497ef277%3aa43b07eb%3a751cdd15%3adfad98a5%3a3cf12cf1%3ad2e10b12%3af3d989c9
Line: 48
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May 30, 2010
Can anybody explain why cant you have more than one scriptmanager control in a page. Why gets emitted in the markup which creates a problem with two scriptmanager control on the page.
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