Web Forms :: Difference Between Ispostback And Iscallback?
Apr 16, 2010the simple difference between Ispostback and Iscallback..
View 1 Replies
Similar Messages:
Difference Between IsCallback And IsInAsyncPostBack
Mar 15, 2010I can't find any answer yet on google.
View 1 RepliesWeb Forms :: Logic Behind IsPostBack
Aug 16, 2010have gone through many post but unable to identify how IsPostback peroperty of page works.HTTP is a stateless protocol so how server identify that a client is making request 2nd time not 1st time and set the value for IsPostBack Peoprty.
View 2 RepliesWeb Forms :: Detect A Pages !IsPostBack In Its User Control?
Aug 4, 2010I have a page that uses a user control, I have to detect the pages !IsPostBack in the User Control and do some operation
In the User controls page Load method I tried using the following variations to detect the first load
!Page.IsPostBack
!Page.IsCallback
!this.IsPostBack
!this.IsCallback
!this.Parent.Page.IsPostBack
!this.Parent.Page.IsCallback
None of these worked, they all fail to detect the parent pages 1st load in the usercontrols page load method
I also tried using
if (Request.UrlReferrer.AbsolutePath.ToString() != "/PreviosPage.aspx")
This worked for Fire Fox and Chrome but not IE (IE has issues with Request.UrlReferrer, it throws a null exception)
So I cant use this approach as well.
Web Forms :: Dynamically Add Object In Page Causing Second Postback With Ispostback?.
Jan 17, 2011I dynamically add the webcontrol in onInit or onload (page_load). it will cause the second post back and with the ispostback==false;
if first enter the page is no problem. but if I click on the some button. it will trigger postback two times.
first time: ispostback = true.
second time: ispostback = false.
the second time postback caused me headache because all my value has been initialized due to the coding like below:
DataTable _temp;
if(! ispostback)
[Code]....
Web Forms :: What Can Remove All Info From Viewstate And Making The Ispostback Again To False
Apr 23, 2010I have a strange problem, my webform is loading twice.
when i debug i see ispostback is showing false for both times.
what happened to the first time load , and the viewstate.
What can remove all info from viewstate and making the ispostback again to false.
i am having real difficulty figuring out what is causing this problem.
Web Forms :: Sequence Order For Page.IsPostBack And User.Identity.IsAuthenticated?
Apr 22, 2010What is the best sequence order for Page.IsPostBack and User.Identity.IsAuthenticated? From what I have search for, this comes up most common:
If Not Page.IsPostBack Then
If User.Identity.IsAuthenticated Then
~Some kind of code~
End If
End If
Is this considered "best practice" or can the two items - Page.IsPostBack and User.Identity.IsAuthenticated -be split into their own sections so the fuctions of these can be independent of each other?I am trying to troubleshoot a placeholder that disappears from a master page when a content page button is pressed to change the content pages active view (I have a multiview w/ 5 views inside of it).
Urlrewriting IsPostBack Always False?
Sep 29, 2010I am working on rewriting URLs Urlrewriting.net, and have run into what seems to be a common problem but I can seem to fix it. I'll present a simplified case.
The URL rewriting is working perfectly with the rule:
<urlrewritingnet rewriteOnlyVirtualUrls="true" defaultPage="default.aspx" defaultProvider="RegEx" xmlns="http://www.urlrewriting.net/schemas/config/2006/07">
<rewrites>
<add name="catalog" virtualUrl="^~/catalog/(.*)/(.*).aspx" rewriteUrlParameter="ExcludeFromClientQueryString" destinationUrl="~/catalog.aspx?cid=$1&c=$2" ignoreCase="true"/>
</rewrites>
</urlrewritingnet>
On the page I have a DataList with 2 asp:buttons inside. When clicked, the page refreshes but does nothing.
I followed ScottGu's article to impliment a form control adapter to rewrite the action of the form to match the rewritten URL.
Page URL in the browser:
[URL]
<form name="aspnetForm" method="post" action="/dev/catalog/13/Music.aspx" id="aspnetForm">
I now see the correct URL on the form action, and when debugging I can see the page load event firing.
The problem now is that every time the page loads Page.IsPostback is false, causing the page to rebind the DataList and therefore ignore the ItemCommand the buttons should be triggering.
if (!Page.IsPostBack)
PopulateControls();
I'm using .NET 3.5 SP1, there is a ScriptManager on the master page but no UpdatePanel on this page. I've also tried resetting the Form.Action property and bypassing ScottGu's solution with the same result. If I go to the page URL directly without using the rewriter everything works fine.
Implement IsPostBack Event From Javascript?
Dec 2, 2010I am using ASP.NET. I have to set the value of a variable [testVar] into javascript on page load. only for the first time when the page load. Just like !IsPostBack event on code side. From next postback this function of javascript should not call.
View 1 RepliesState Management :: Output Cache And Not IsPostBack
May 18, 2010 I'm trying to cache a complex page with lots of controls on it so that if the user navigates to it later it will look like it did when he last saw it.The page has controls which post back and other controls are populated depending on the selections.
I'm using [Code]....
after the <@ Page directive.
What happens is that a postback gets the cached page, so no processing and it looks the same regardless of user selections. So far so good. But if I browse to another page and return by a link, the cached version is ignored and the default page is created again. This is more or less the opposite to what i want.
I attempted to use the validation callback to ensure that a postback resulted in a new version, and that worked, but it still ignored the cached page if it wasn't a postback.I realise that it will need more work to ensure each user gets their version of the page from the cache, but why bother if this doesn't work.
If (IsPostBack) Property Inside Page_Load Is Doing Return?
Jul 20, 2010I am looking into someone's code for a production application which is working fine.There is one page (main.aspx) and this main.aspx has 5 user controls inside it.Inside the Page_Load event of the main.aspx and all other user controls the first line of code is:
protected void Page_Load(object sender, EventArgs e){
if(IsPostBack) return;
I am finding this line very strange. As all the button events are postbacks. Then how come this application is working fine?
C# - Whenever RewritePath() Is Called, Page.IsPostBack Is False?
Mar 23, 2011I'm developing a custom URL Rewriter for a ASP.Net 3.5 project. This rewriter is not functionally different than most rewriters out there, the only difference being that the friendly URL collection is not loaded from a web.config file -- it's coming from a database instead. I made the naive assumption that it would be easy to develop a custom rewriter module from scratch, but now I know the mess I put myself in. I digress; let's go straight to the technical issues.
While testing the rewriter, I set up a friendly url that would take the user to a web form. Postbacks from this form should not alter the friendly address, as anyone would expect, sohttp://my.web.site/app_root/FriendlyURL is always rewritten asttp://my.web.site/app_root/not_friendly/form.aspxThings are fine when the browser first loads the FriendlyURL. The page comes up and is completely functional. However, when the form is posted back to the server, the page simply reloads but, at server-side, IsPostBack is false. It's like F5 was hit, except that a HTTP POST had indeed occurred.Unsurprisingly, when the interaction occurs through the "unfriendly" URL, the POST action triggers the postback as expected. This evidence suggests that HttpContext.RewritePath is somehow messing with the page lifecycle in a way that it loses sense of the postback operation.
Sessions Lost When The Page Is Reloaded (ispostback = False)?
Feb 27, 2010I have an asp.net page that sets a few session variables. On my development machine (localhost), I do a postback and the session values are still populated.
When I Reload the page by clicking on the url bar and pressing enter the session variables are still there.
However when i deploy this page to a webserver, the page still retains the session values when doing a postback, but as soon as i click the url and press enter the session values are lost (where the ispostback = false)
But when i press the refresh button the session variables are present (but i do get a popup warning me that the page data needs to be resent!)
i am running IE 7, and the webserver is iis6 what am i doing wrong?!
Web Forms :: Updating Email Of Membership / Onload Data is Within "If Not Ispostback"?
Sep 9, 2010I have this form to update a users details. This really should work but doesn't seem to want to update the email, isApproved etc. The onload data is within "If not ispostback". I can't see why this won't work. It is attached to an update button btw.
[Code]....
Web Forms :: Page.IsPostBack Is False Incorrectly After Page Is Idle For About 20 Minute?
Feb 8, 2010When any of my page is idle for about 20 minute, and after that if I hit any button, like Sumit Button or any other button, at this time, Page.IsPostback is again False, and none of the click event is fired and page gets reloaded again.
This happens only if I go like this, open up any of my webpage, keep it idle OR do nothing for about 20 minute, exactly on 21st or 22nd minute, Click on any of the button on the page, and the page gets reloaded, click event does not get fired. I debugged for this and I checked the Page.IsPostback value at this point and I got it as False after 20 minute, I don't know why. It should be True. And because of this my page gets reloaded and nothing gets submitted and every control is in the blank position once again and user have to enter everything again.
But if I enter everything and hit any of the button or Submit button within 20 minute, then everything works fine, Submit button's click event is also gets fired and everything works perfect.
And this is happening in all of my page. I am not sure what configuration is wrong.
But just for more details, I have a master page, I am using Telerik Controls and I have session Timeout set as 60 minute everywhere, in web.config and in IIS settings and in my App_Pool also. On my Master Page, I have ASP:ScriptManager, Tekerik:RadMenu, ASP:ContentPlaceHolder controls and some other controls and javascript code too.
[code]....
State Management :: Code Is Not Working Propely When Using Page.Ispostback
May 28, 2010I want to don't let the page to go back ,for that i am using the code to expire the page after the first time it loads so that when second time the page will load it will not find the such page in cache ,but problem is that my code is not working propely when i am using page.Ispostback, iam inserting my code here[Code]....
View 1 RepliesAJAX :: Page.IsPostBack Returns False On Partial Page Update?
Apr 16, 2010I have a page with a (gridview nested within a gridview) in an UpdatePanel (UpdateMode="Conditional"). The nested gridview drops down when you click on an arrow and then you can click on each subgrid rows command field. The gridviews are loaded from the Page_Load event. When I click on the commandfield in the subgrid the Page_Load fires during the partial page postback. From what I have read this is normal with UpdatePanels. But What I don't understand is why both Page.IsPostBack and ScriptManager.GetCurrent(Page).IsInAsyncPostBack test false after I click on the command field in my grid. I need to stop the rebinding of the gridviews ( which causes the subgrid to collapse ) when the command field is clicked.Also: I am using MasterPages and the <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> is located in my mater page form section.Would anyone have any suggestions how to test if a partial page postback is occuringHere is a link to the page source: http://pastebin.org/153774here is a link to the code behind: http://pastebin.org/153781
View 2 RepliesSession When Cookieless ="True" Page Ispostback Is Always False?
Oct 7, 2010When Session attribute Cookieless ="True" the page.Ispostback is always false.Cant understand the reason behind it.
And one more thing what is happening when we click Remember Me option in login control.As per my knowledge it is storing authentication cookie in it. If we can add data to authentication cookie then why we need session...we can add session data in that.. and authentication token is also regenerated for every new request like sessions.....i got confused after browsing for few hours.
Which one is more secure using cookies or URL for authentication and session.
Web Forms :: Mainly Difference Between Two, When To Use
Aug 4, 2010I need to know the difference of UI paging and Datasource paging.. can we have Sqldatasource paging if its yes let me know how to do..?
What is the great usage of having Datasource Paging...
Web Forms :: What Is The Difference Between <% %> And <%= %>
Aug 12, 2010What is the difference between <% %> and <%= %>
I assume this means the same using either Webforms or MVC.
Web Forms :: Difference Between IIS And VS2008 IIS?
Mar 10, 2010I have the project in vs2008. I find that there is difference behavior between VS2008 Debug Mode IIS and Windows 7 IIS.
I have published the project and deploy on windows 7 IIS.
Different examples: After login, VS2008 debug mode can go to default page but not in windows 7 IIS in which it return back to login page after login. Sometimes, they can login but still difference behavior in page reload such as dropdownlist databind.
Web Forms :: Difference Between MasterPage And CSS?
Jun 2, 2010I am not able to understand difference between MasterPage and CSS.
View 3 RepliesC# - Difference Forms And None Authentication?
Jan 11, 2011I am looking for difference between forms and none authentication in asp.net, as I didn't find enough content to clarify it,
View 1 RepliesWeb Forms :: Difference Between Doing It Clientside And Serverside?
Jun 12, 2010Anyway, if for example I have a textbox that I want to enable when the user check the desired checkbox/radiobutton, I like the textbox to be default enabled=false. What's the good approach between these two?
a.) client side
[Code]....
Web Forms :: Calculate The Difference In Dates?
Nov 22, 2010i have a text box named txts_date where the date format is dd/mm/yyyy....and i have a label name lblduration...now my need is i have another text box named lble_date...i want to add the value of duration ie lblduration to txts_date and display it into txte_date...
for example...
txts_date has date 22/11/2010 and lblduration has text as 10 so i want to add both the values so the result would be 02/12//2010..