Async Postbacks Happening When SupportsPartialRendering Is Set To False?
Sep 9, 2010
We're getting a confusing error on two of our pages in our ASP.NET application. Both pages originaly had tags to reload the page every so often if a user sat on it for a while, but opted to remove those in favor of some AJAX flavoring. Specifically, we created timer controls on the page and wired the timer's tick event as a trigger for an update panel to reload a portion of the page. The page(s) also have scriptmanagers on them as we don't have one on the master page. This largely works great except we're getting a lot of these errors:
"The page is performing an async postback but the ScriptManager.SupportsPartialRendering property is set to false."
It is my understanding that if the .NET framework detects a browser doesn't support partial rendering it will set the ScriptManager.SupportsPartialRendering value to false and we're NOT overriding this in any fashion. Therefore, the pages shouldn't be by performing async postbacks if that value is false, but based on the error the postbacks are still happening and the page is throwing an exception.
Curiously, the user agent always seems to be GoogleBot or "Mozilla/4.0 (Windows 98; US) Opera 10.00 [en]".
Say I have 2 UpdatePanels on the page and each UpdatePanel has a one server Button each. When I click on the first button and then the second button and look in Firebug, I see that the 2nd async postback is not triggered until the first one completes.
Is this working as expected? My understanding was with AJAX postbacks, the event handlers for the buttons trigger simultaneously.
We have an ASP.NET page which uses an update panel for partial page postbacks. On the server side, the postback performs some database work and updates several UI elements. The database code is all contained in several transactions, so the state will still be consistent if an exception is thrown. We're working on some error handling code now, and my first thought was to log the exception thrown, reload the last consistent UI state, and show some sort of modal popup or other ui element with a brief error message for the user (this is an intranet page, so we're automatically notified of the bug, and the users know where to find us.
What I'm looking for is to disable the submit button if any of the inner updatepanels are in postback mode. I would also like some way to block that particular panel. I guess for the outer updatepanel, updatemode should be set to conditional, and usechildrenastriggers should be false. What's really bugging me is how to block the panel while a postback is occurring.
In all my tests thus far, the outer updatepanel's updateprogress is triggered, which blocks the whole page.
So I have a page with an UpdatePanel and some controls in there. When I explicitly type/copy+paste the page's address into the address bar, let VS navigate there for me, or follow a link to the page, all of the AJAX works fine. But if I refresh this page, the JS on the page initiates the async postback, but the appropriate event is never called on the server (although Page_Load is) and the client never recieves the markup sent back by the server. This issue seems to be limited to Firefox 3.6 (Gecko build 1/15/2010)(doesn't happen in IE8). I have yet to try on other versions of Firefox.
I have a very typical set up, an ajax update panel is updated when a drop list of offices changes. Each form could have it's own values, for instance each store will have it's own list of employees. Here is where the fun begins. The form can be changed by the drop down (new office) or validated and submitted.
On drop down change, I create a new instance of the same rad combo, bind it to the current data, confirm that the correct data is bound. Then on the return trip I see selected the default user from the previous user. This is a composite control, and firebug shows me that the value for the "text box" that simulates the combo still has the old value. I'm suspecting onViewStateLoaded, but turning viewstate off for the Telerik didn't . II don;t need it anyway, cuz I have to put the selected value in another hidden to make a cross page post on submit.
I am having a problem with users clicking submitting pages multiple times. What is happening is a user will click a link, if nothing happens in .025 seconds they click another link or menu item, etc. I handle users clicking the back button and the impatient user winds up getting directed to my "Dont click the back button" page even though they dont click the back button.
I need to prevent mutiple submits by disabling all submit controls on my pages. I dont have a single submit button, i have pages with menus, gridviews, yada yada that all need to get turned off. I have pages that use update panels and pages that dont. All my pages inherit from a BasePage class. I would like to solve this problem by implementing the solution in my BasePage class.
I did a little research and found this little script that works for synchronous postbacks:
I am trying to create a simple web application that uses a barcode scanner to read the barcode and then insert the information into a database. I have been able to get the barcode scanner to read the barcode and place the information into a textbox.
Then using javascript when the enter key is triggered on the scanner it then clicks the button to do a AsyncPostBack on the updatepanel then using scriptManager.RegisterStartupScript I then focus on the text box and then select the text in it ready for a new barcode to be entered.
The problem that I am having is that I can get it to post back 26 times then it will go to error (with no information). If I then add additional controls to the page I can only get it to post back 10 times. Below is my code... I have been pulling my hair out for the last two days.
I m passing Id from one page to another other page using querystring string. At first time it is displaying data in datalist in 2nd page on basis of selected Id. But again on home page while clicking on other image then previous record is showing. At second time, page load is not happening while testing using break point.
What is the error.? There is also AutoEventWireup="true".
NOTE: I have an aspx ASPX page which is rendered from a SiteMap. 1st time the POSTBACK happens, but subsequently in same sessions, POSTBACK does not get fired.
HACK (not working) - I have the refresh meta tag like this inside the HTML tag
When I am visiting this ASPX page, I want this META tag to be called only ONCE. So, I was trying the following code in OnLoadComplete event ?- HtmlMeta meta = new HtmlMeta(); HtmlHead head = (HtmlHead)Page.Header; head.Controls.RemoveAt(0);
In form I have added two radio button and on one radio button oncheckedchanged event has been registered but this event does happen only when i select the button and not when i select the other(The checked is changed).
We are creating a new user control using a boiler plate template for our application. We noticed that anytime a textbox on the new user control has a focus and the enter key is pressed, the form executes a postback. This happens even if the AutoPostback on the text box is set to true. No other user controls in our app behave this way. What could be some of the places for me too look?
I have two Listboxes side by side. First Listbox lists all employee. I have a button to move selected employee from Listbox 1 to Listbox 2. If i select multiple employee from ListBox 1 and click on a button to move to selected employee to ListBox 2, then only alternate selection is moved.
I'm trying to use the UpdatePanelAnimationExtender inside nested UpdatePanel. I found out that there the onUpdating is always ran on every callback.I was trying to cancel it on the beginrequest as follow.
<script type="text/javascript" language="javascript"> Sys.WebForms.PageRequestManager.getInstance().add_beginRequest(BeginRequestHandler); function BeginRequestHandler(sender, args) {
I am working on a content management system which is being sort of retrofitted onto an existing database, and the database has many many tables. There will be a staging database, where we will make changes and allow users to 'preview in place'. Then any changes have to be approved, and to publish them we will connect to a live version of the same database (same schema) and play-forward the captured changes.I have found some code (called Doddle Audit) which, with some customization, is giving me great information about what is changing. I am able to get a list of all columns, before and after, for updates, inserts, and deletes. But what I would really like to have is the underlying SQL being run by SubmitChanges(). LinqToSql has to generate this, so why can't I have it? I have googled around and looked at code involving SubmitChanges, mousing over stuff, and I can't seem to find it. Does anyone know of a way to obtain this?
I have an Ajaxable application which has some UpdateProgress for each postBack events.
I want to display another Indicator in my SiteMapPath bar which shows a post back is happening no matter what.
For example when user clicks on a button an UpdateProgress display an Indicator Image in central part of application. I want to display another image ( for every postbacks not only for one) in top of application toolbar.
Currently I use a simple Flag out ther and I want to use an indicator instead of that flag when ever a postback happens
I have a drop down list with questions, according to selected question a chart is generated, when you enter the page and select a question for the first time, the chart gets generated correctly, but then when you select another question update panel doesn't show the updated chart (all charts are working, if i test the questions manually).
I have a button, contained in a panel, with a click event, that works fine. However when a users presses another button, I need to move this button into another panel (this is actually a panel with a modalpopupextender), so I this code to do so:
newPanel.Controls.Add(buttonPanel)
It all get's moved and looks fine. However now when the button is clicked it doesn't fire the associated event. I have tried re-adding the event in the page_init, with this code
((Button)this.FindControl("serverModalSave")).Command += new CommandEventHandler(modalSave_Click);
But with no luck. How can I get this button to fire it's click event when moved, and why does it stop working when it's moved?
EDIT:
This Button needs to be added to a panel specified by the user at run time, so there is not a way to determine where the button will go in advance.
I could instead of moving this button, create a new one, but because this button is not created in the page_init I am having issues getting that to fire an event either.
I have a gridview with a select command.. When user selects a row.. I need to populate 4 dropdownlists with the values in gridview, dropdownlist which are also populated at page load event...
Though there is value in the dropdownlist when i try to update it selects 0th value.. Since while updating i use drptask.selectedvalue.tostring() since i am saving int values in database
Trying to check if an insert of a new record into an SQL table is happening successfully. I can see that the insert is occuring OK but am not getting the verification to happen.
I'm a little new to C#, I'm thinking it may be in the syntax I'm using in my method in the .cs file line 45. Can't seem to fix it right though.
I was wondering if anyone had an easy way to wire up javascript event handlers to events happening on the server-side. I have a long running process that includes a lot of steps, and would like the client to be continually updated with new information as the steps transition. Will this involve some sort of polling mechanism?
I am selecting the date field in the 'dd-mm-yyyy' format by using SQL Codes(103,105...).While inserting I want the userto insert the date in same format(dd-mm-yyyy) but it will not happening as in SQL Server we need to insert the date in'mm-dd-yyyy' format.Pls send me insertion query in sql to achieve this.Pls respond me ASAP.
