Urlrewriting IsPostBack Always False?
Sep 29, 2010
I 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.
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Mar 23, 2011
I'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.
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Feb 27, 2010
I 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?!
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Apr 23, 2010
I 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.
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Feb 8, 2010
When 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]....
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Apr 16, 2010
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Oct 7, 2010
When 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.
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Sep 28, 2010
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Sep 13, 2010
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Jul 23, 2010
I have a fully dynamic application that uses UrlRewriting.Net that works perfectly within the visual studio environment. As you can see from the rules within the web.config file below, UrlRewriting.Net rewrites the destination as "~/index.aspx?URLPath=$1&URLString=$2", basically index.aspx searches the database for the page properties and builds the page based on the parameters passed. There are no physical files for the website, only index.aspx with all pages and its webparts build dynamically on the fly.
The application is compiled as ASP.NET 3.5 and runs on a Windows Server 2003 x64 standard edition.
To my knowledge the configuration you see in the web.config below should work in iis6, however does not
. Does the installment of UrlRewriting.Net require configuration in iis6 as well?
<!-- Web config file start -->
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<configSections>
<sectionGroup name="robo.webProfile">
<section name="webProfileSettings" type="WebProfileBuilder.WebProfileConfigurationSection, WebProfileBuilder, Version=1.3.0.0, Culture=neutral, PublicKeyToken=01d50f1f82943b0c" allowLocation="true" allowDefinition="Everywhere" />
</sectionGroup>
<section name="urlrewritingnet" requirePermission="false" type="UrlRewritingNet.Configuration.UrlRewriteSection, UrlRewritingNet.UrlRewriter" />
<sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"
/>
<sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere" />
<section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"
/>
<section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"
/>
<section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication" />
</sectionGroup>
</sectionGroup>
</sectionGroup>
</configSections>
<robo.webProfile>
<webProfileSettings className="ProfileUtil" nameSpace="CustomNameSpace" directory="CodeFiles" fileName="ProfileUtil" />
</robo.webProfile>
<urlrewritingnet rewriteOnlyVirtualUrls="true" contextItemsPrefix="QueryString" defaultPage="default.aspx" defaultProvider="RegEx" xmlns="http://www.urlrewriting.net/schemas/config/2006/07">
<rewrites>
<add name="SiteWideRewrite" virtualUrl="^(.*)/(.*).html" rewriteUrlParameter="ExcludeFromClientQueryString" destinationUrl="~/index.aspx?URLPath=$1&URLString=$2" ignoreCase="true" />
<add name="SiteWideRewrite_2" virtualUrl="^(.*)/(.*).aspx" rewriteUrlParameter="ExcludeFromClientQueryString" destinationUrl="~/index.aspx?URLPath=$1&URLString=$2" ignoreCase="true" />
</rewrites>
</urlrewritingnet>
<appSettings>
<add key="MediumImageFolder" value="C:Users" />
<add key="SiteUrl" value="http://www.mysite.com" />
</appSettings>
<connectionStrings>
<remove name="LocalSqlServer" />
<add name="default" connectionString="Data Source=mydbSQLEXPRESS;Initial Catalog=CoreCms;Integrated Security=True" providerName="System.Data.SqlClient" />
<add name="LocalSqlServer" connectionString="Data Source=mydbSQLEXPRESS;Initial Catalog=CoreCms;Integrated Security=True" providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<profile defaultProvider="CoreCms.ProfileProvider" inherits="CoreCms.Profiles.SiteProfile">
<providers>
<add name="CoreCms.ProfileProvider" type="System.Web.Profile.SqlProfileProvider" applicationName="/" connectionStringName="LocalSqlServer" />
</providers>
</profile>
<roleManager enabled="true" />
<membership>
<providers>
<remove name="AspNetSqlMembershipProvider" />
<add connectionStringName="LocalSqlServer" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" applicationName="/" requiresUniqueEmail="false" passwordFormat="Hashed" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="7" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" passwordStrengthRegularExpression="" name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
/>
</providers>
</membership>
<webParts>
<personalization defaultProvider="AspNetSqlPersonalizationProvider">
<authorization>
<allow users="*" verbs="enterSharedScope" />
<allow users="?" verbs="enterSharedScope" />
</authorization>
</personalization>
</webParts>
<authentication mode="Forms" />
<authorization>
<allow users="*" verbs="enterSharedScope" />
<allow users="?" verbs="enterSharedScope" />
</authorization>
<customErrors mode="Off" />
<compilation debug="true">
<assemblies>
<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
</assemblies>
</compilation>
<webServices>
<protocols>
<add name="HttpSoap" />
<add name="HttpPost" />
<add name="HttpGet" />
<add name="Documentation" />
</protocols>
</webServices>
<httpModules>
<add name="UrlRewriteModule" type="UrlRewritingNet.Web.UrlRewriteModule, UrlRewritingNet.UrlRewriter" />
<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</httpModules>
<pages>
<controls>
<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</controls>
</pages>
<httpHandlers>
<remove verb="*" path="*.asmx" />
<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add verb="GET,HEAD" path="ScriptResource.axd" validate="false" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
</httpHandlers>
</system.web>
<system.codedom>
<compilers>
<compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CSharp.CSharpCodeProvider,System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" warningLevel="4">
<providerOption name="CompilerVersion" value="v3.5" />
<providerOption name="WarnAsError" value="false" />
</compiler>
</compilers>
</system.codedom>
</configuration>
<!-- Web config file end -->
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Apr 2, 2011
I'm trying to implement custom urlrewriting in the global.asax of my website and i'm experiencing some troubles with updatepanels from the ajaxcontroltoolkit:second post back of my updatepanels seems to request the wrong url (ie : if my rewrited
url is /en-US/parentPage/myPage.html and the physical url is /default.asp?ln=en-US&page=myPage, the second post back request /en-US/parentPage/default.asp?ln=en-US&page=myPage, which leads to file not found ...)
I dont know if it matter but i desactivated the viewstate on the page by setting Page.EnabledViewState to false.To implement urlrewriting i used Server.Transfert(physicalUrl, true)
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Mar 24, 2011
I'm using urlrewriting.net and want to add a rule to map all classic asp requests to default.aspx.Unfortunately my attempt below just results in a redirect loop, so I must be doing something wrong.
<add name="LegacyRedirect"
virtualUrl="^~/(.*).asp"
redirectMode="Permanent"
redirect="Application"
destinationUrl="~/default.aspx"/>
View 2 Replies
Jan 24, 2010
I'm using urlrewriting.net to redirect a cascading stylesheet image request. I've been trying without luck to do so. Here's the rewrite I added:
<add name="reportImagesRedirect"
virtualUrl="^~/estadisticas/(.*).png"
rewriteUrlParameter="ExcludeFromClientQueryString"[code]...
I'd like to know if there's something wrong with it. I'm trying to link all the http get requests made to one folder to be redirected to the images folder. So for instance when I make a request like this
http://localhost:8080/estadisticas/spines.png
I want the web server to look the image in
http://localhost:8080/images/spines.png
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Jan 8, 2010
I've used the UrlRewriting.Net module for a couple years now without any problems in Windows XP and Windows 2003. I just recently upgraded my home PC to Windows 7 and started developing a new website.The plan was to use .html extensions and rewrite them to their .aspx counterparts using the UrlRewriting.Net module. Everything works flawlessly in VWD 2008, but when I try running it through IIS7 it is a different story.
When I try to access a page via the .html rewrite I can no longer access Page.User; it keeps returning null. If I hit the page using it's .aspx extension, Page.User is correctly populated. I should also mention that I have a LoginView controller in my Master Page and it suffers from the same symptoms: When accessing via .html extension it shows the AnonyousTemplate; When using .aspx extension it properly shows the LoggedInTemplate. I'm guessing the two are related.
[Note: I've also tried extensionless URLs and they exhibit the same problem]
The only way I've gotten it to work is to switch the application pool to Classic, which then requires me to add an ASP.Net ddl handler for the .html extension [otherwise it is handled by the StaticFileHandler and comes up as a 404 error]. However, I'd like my web app to run properly for people without having to fiddle around with IIS.So I am left with several questions:Does anyone have ideas as to why Page.User always equals null for .html => .aspx rewritten pages?
Why does it work in VWD 2008, but not IIS7?
What changed from IIS6 => IIS7 that could have caused this?
[Note: I just tried a .aspx => .aspx rewrite and it did not exhibit the problem. Not really what I want, but thought I should mention it.]
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Aug 16, 2010
have 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.
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Dec 2, 2010
I 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.
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Apr 16, 2010
the simple difference between Ispostback and Iscallback..
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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.
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Jul 20, 2010
I 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?
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Jan 8, 2010
[FYI - Posted the same thing over at StackOverflow]I've used the UrlRewriting.Net module for a couple years now without any problems in Windows XP and Windows 2003. I just recently upgraded my home PC to Windows 7 and started developing a new website.The plan was to use .html extensions and rewrite them to their .aspx counterparts using the UrlRewriting.Net module. Everythingworks flawlessly in VWD 2008, but when I try running it through IIS7 it is a different story.
When I try to access a page via the .html rewrite I can no longer access Page.User; it keeps returning null. If I hit the page using it's .aspx extension, Page.User is correctly populated. I should also mention that I have a LoginView controller in my Master Page and it suffers from the same symptoms: When accessing via .html extension it shows the AnonyousTemplate; When using .aspx extension it properly shows the LoggedInTemplate. I'm guessing the two are related.[Note: I've also tried extensionless URLs and they exhibit the same problem]The only way I've gotten it to work is to switch the application pool to Classic, which then requires me to add an ASP.Net ddl handler for the .html extension [otherwise it is handled by the StaticFileHandler and comes up as a 404 error]. However, I'd like my web app to run properly for people without having to fiddle around with IIS.
So I am left with several questions:Does anyone have ideas as to why Page.User always equals null for .html => .aspx rewritten pages?Why does it work in VWD 2008, but not IIS7? What changed from IIS6 => IIS7 that could have caused this? Any other thoughts on workarounds?[Note: I just tried a .aspx => .aspx rewrite and it did not exhibit the problem. Not really what I want, but thought I should mention it.]
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Aug 4, 2010
I 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.
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Jan 17, 2011
I 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]....
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May 28, 2010
I 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]....
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Apr 22, 2010
What 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).
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