Only One Instance Of A Scriptmanager Can Exist On A Page?
May 13, 2010
I design an ASP.NET web usercontrol and with a maskeditor and scriptmanager, I always get an object reference not set to an instance of an object exception at runtime.
Stacktrace is:
[InvalidOperationException: Only one instance of a ScriptManager can be added to the page.]
System.Web.UI.ScriptManager.OnInit(EventArgs e) +384613
System.Web.UI.Control.InitRecursive(Control namingContainer) +333
System.Web.UI.Control.InitRecursive(Control namingContainer) +210
System.Web.UI.Control.InitRecursive(Control namingContainer) +210
System.Web.UI.Control.InitRecursive(Control namingContainer) +210
System.Web.UI.Control.InitRecursive(Control namingContainer) +210
System.Web.UI.Control.InitRecursive(Control namingContainer) +210
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +378
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.
I have a user control with both an UpdatePanel and a ScriptManager.
Some pages in the system have a ScriptManager of their own, and need to include the UserControl.
This throws the "You can only have 1 ScriptManager" exception.
If I remove UserControl's ScriptManager, I'll get 'UpdatePanel1 requires a Script Manager" exception.
I've tried to modify the UserControl to dynamically include it's own script manager if none exists. But all the methods I've used before involve adding a delegate to Page.OnInit-- which won't work, since the UserControl Init fires first.
Because the system designers here like making my life difficult, I can't create a MasterPage, or a BasePage for the system in inherit off of. I'd be stuck going to each page an adding a ScriptManager before the UserControl on each of them. Is there any way of, in the UserControl, detecting if the page has a ScriptManager, and if not, adding it dynamically in a way that makes the UpdatePanel happy?
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.
All the other content pages which has ScriptManager throws the error Only one instance of a ScriptManager can be added to the page. I don't want to work on most of the content pages again to remove ScriptManager. Is there any easy way to do this something like coding in Master page which decides if there is already ScriptManager already, then don't load it.
I'm trying to extend ScriptManager to simplify dealing with resources that have multiple resource files (e.g. more than one script file as well as css). The goal is that I will be able to add a single ScriptReference to Scripts and have it load more than one resource related to that reference name.
What I'm getting stuck on is, how does your basic ScriptManager know what to do with stuff when when using static methods that do not include a Page parameter? For example:
ScriptManager.ScriptResourceMapping.AddDefinition("someName", new ScriptResourceDefinition { Path="/script/somescript.js"});
This adds a definition to (I guess) whatever the active script manager is for the page that's running when you call it. But unlike the old-school methods, like RegisterClientScriptBlock there is no parameter passed that identifies the page. But this stuff must get stored in the ScriptManager object, no? So how does it know?
I could always get a reference to the active one with this:
ScriptManager.GetCurrent(page);
but ideally, I would create new methods that work exactly like Microsoft's. I can't figure out how I could implement something like
I've upgraded my web application from ASP.NET 2.0 framework to 3.5. I've also updated AJAX toolkit from 2.0 to 3.5. The updated was made on 20th of January.
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.
Is it possible to put a ScriptManager Control in a Content Page?I've tried inserting a ScriptManager, UpdatePanel, and ContentTemplate within the ContentPlaceHolder1 of one of my pages and it's not working.
We are rendering usercontrols dynamically like this:
[Code]....
This lets us the same user controls when rendering pages normally as we do when rendering responses to ajax calls. However, when adding controls which themselves contain a scriptmanagerProxy we run into the problem that the newed up Page object doesn't contain either a ScriptManager or the HtmlForm in which the ScriptManager needs to run.
I have a small website that uses 1 masterpage and several content pages. I'm able to insert a <ScriptManager> onto my content pages (just a couple of them). However, when I try to insert the <UpdatePanel>, it won't take it. I tried to wrap the <UpdatePanel> around a <Div> and it didn't like that, so then I tried wrapping the <UpdatePanel> around the actual textbox and it didn't like that. Below is some sample code.
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.
I am using Master pages for my ASP.NET website and in one of the content pages I upload a file which requires a bigger timeout value than the default 90 seconds. for other content pages I want to leave the default timeout value as it is. is it possible to set the timeout just for a specific content page? I checked the ScriptManagerProxy component, but it doesn't have this AsyncPostBackTimeout property.
I recently added a Telerik control to an ascx that is included in an aspx page. This page has a "Send email" button, which when clicked will email the user the rendered output of the page. The Telerik control I added requires a ScriptManager, so I added that to the ascx. However, now the email button won't work. I get the following error:
The control with ID 'myIdHere' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.I know the script manager exists because the page works fine when I go that url, it is only failing when it tries to email the rendered output.Here's a code snippet, any ideas as to whether there is a problem with scriptmanager when doing this sort of thing?
Page EmailPage = new EmailBasePage(); System.Web.UI.HtmlControls.HtmlForm EmailForm = new System.Web.UI.HtmlControls.HtmlForm();
I am using Master pages for my ASP.NET website and in one of the content pages I upload a file which requires a bigger timeout value than the default 90 seconds. for other content pages I want to leave the default timeout value as it is. is it possible to set the timeout just for a specific content page? I checked the ScriptManagerProxy component, but it doesn't have this AsyncPostBackTimeout property.
I got a problem in my Asp.net application.When I try to save some data, I check if the data is right, When not I call a jquery dialog with the error message. But when my jquery dialog appears, my background form dissapears.and I get a javascript error: "html parsing error unable to modify the parent container element before the child element is closed".This is my jquery dialog call in codebehind:
string script = "openDialog('" + text + "', '" + title + "');"; ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "open", script, true); function openDialog(text, title) { ar $dialog = $('<div></div>') .html(text) [code]...
I'm trying to do the next steps:1 - Click in submit Button inside update panel to make some server work - Ok 2 - If the work is succefully made i need to ask the user to confirm some information - I'm using a javascript function - Ok3- Javascript function executes and clicks in another button (hidden) inside the same update panel. - Ok4- Button click event fires and some server work is done. - Ok.5 - The panel doesn´t update - Wrong
Confirm.aspx: function confirmSubmit(buttonId, msg) {
This is the exact same question as this unanswered one from May.
(edit) Note: this unanswered post exactly describes the behavior - extra scripts being added in the <head> by ScriptManager.RegisterClientScriptBlock in a usercontrol, in an UpdatePanel, is causing duplicates. C# .NET 4.0. The page is structured like this:
MasterPage Page UserControl1 (ascx) - loaded in code by Page UpdatePanel UserControl2 (ascx) - loaded in code by UserControl1
The first time the script is added as expected, in the body. The code, simply, in the UserControl2 OnInit:
I've also tried referencing "this" instead of page, which doesn't really make sense since I don't want the same script keys duplicated on the page if the usercontrol is loaded multiple times on a page, but it didn't work anyway.
After a partial postback, the script is added again - but curiously in the <head> of the page, not the body, and interestingly, lacking the normal //<![CDATA[...//]]> wrapper that asp.net usually adds.
Another script which is added by UserControl1 is duplicated exactly the same way after a partial postback.
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.
So my question is: What do I have to do (set up, instal) on the server so that the MS AJAX framework actually realizes that it can also handle Chrome?
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.
I am hoping I am in the right place for this, I have a web application which has been running for about 4 years recently I updated my Ajax to the most recent version it continued to work OK then I changed from ScriptManager to ToolkitScriptManager now I get an error moving from my default page
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.
I have examined after the page is loaded - ScriptManager1.EnablePartialRendering = true ScriptManager1.SupportsPartialRendering = true I am using vs2005 .NET 2.0 and AJAX extension 1.0 (same version as used in the article)
I moved a website from one server to another. Everything works well except for an admin area that is it's own small .net website. The login page loads but when it goes to the default.aspx page I get "The Page Cannot Be Found" even though it is there. Is there a property setting I need to do on the server for it to be seen? Sorry, just never came across this before.This is the url returned after it tries to go to the default.aspx. I replaced the domain name though. [URL]
I am using VS2010, .Net 4. I am trying to add a ScriptManager to my page, so I can reference an AJAX Enabled WCF Service. When I add the ScriptManager control to my page and view it - I get the error shown below. I have no clue how to resolve it. I get the error by simply putting the control on my page (not reference the WCF Service).
(script type="text/javascript") //(![CDATA[ if (typeof(Sys) === 'undefined') throw new Error('ASP.NET Ajax client-side framework failed to load.'); //]]) (/script)
Actually, my problem is that I am not able to access the service. I am referencing it inside the ScriptManager and have the javascript code in place, but Firefox is reporting that it cannot find it. Says it is not defined. I do not know how to test this or determine where it is failing.
