I'm moving an ASP.NET project from .NET 3.5 to .NET 4.
Everything works beautifully if I'm debugging under web.dev (ie. in Visual Studio [2010]) but as soon as I try and run this under IIS7[.5] the debugger fails to attach. Running the project directly under IIS just causes it to throw back 403s (no subcode, so not much help there).
I setup the site by taking the current (and working!) .NET 3.5 site, and changing the AppPool to one with the .NET 4 runtime. I've confirmed that all file permissions are kosher (at least from the .NET 3.5 perspective). I feel as though I'm missing some configuration step here...
The error message when trying to attach the debugger is just "Unable to start debugging on the webserver." Not the most useful error message in the world.
Directly attaching to the associated w3wp process strongly suggests that the application is never spun up successfully.
The basic question is, how would I affect this change over from .NET 3.5 to .NET 4 for a project running under IIS?
Figured it out.
.NET 4 had not been installed for IIS purposes. Don't ask me why that was the case.
Running asp_net_regiis -i in the .NET 4 install directory (\Windows\Frameworks\v4.0.xxxx) under the Visual Studio Command Prompt (x64 in my case) solved the problem.
You cannot mix .NET frameworks in the same app pool. So ensure that only .NET 4.0 web sites are in your app pool.
Remember to set the web site/virtual directory to .NET 4 as well.
IIS7 has two options within a "website". In IIS6 you'd add a sub-app as a "Add Virtual Directory..." in IIS7 doing so forces you to keep the same AppPool and thus .NET framework version as the website.
But, IIS7 now has an "Add Application..." options, which allows you to essentially do what IIS6 had allowed, so that you can explicitly state the AppPool to run in and it can differ from the parent website.
Start a fresh project from scratch and just use the web.config there. Copy all your 3.5 pages in there and manually move over web.config elements that you need. The pages themselves don't require any converting, it's all in the web.config. The web.config for a .net 4.0 page is actually significantly smaller due to the fact that .net 4.0 is not just an extension of .net 2.0 like 3.5 is.
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I am having a problem with configuring my ASP.NET project on IIS. I have exactly 2 same servers (I mean same IIS settings everything) created from the same image. However, one is working fine, while for the other one, I am facing the problem "Unrecognized attribute 'secure'. Note that attribute names are case-sensitive." (pls see the screenshot below)
Does anyone know what might be the root cause of this and how to resolve it? Thank you.
This error is usually caused by an incorrect .net version, you can try follow steps:
Check on which .NET version the application is developed. Let's assume, it's .NET 4.0.
Open IIS Manager and find the Application Pool, on which your website is hosted.
Go to that Application Pool and check the .NET version and change it to 4.0 accordingly by clicking on Basic and Advanced Settings.
If .NET 4.0 is not listed, go ahead and install it.
If it still won't show up, go to command prompt and fire the below command to find a list of ASP.NET versions installed: C:\Windows\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis.exe -lv
In the output, if .NET 4.0 is not listed, register it by firing the below command: C:\Windows\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis.exe -I.
It should show up as .NET 4.0 in the .NET Framework Version dropdown for the application pool.
We have recently taken on support of a web application that was written many years ago and targeted v1.1 of the .net framework. It runs on Windows Server 2003/IIS 6 environment.
After looking at the configuration of the site in IIS the target framework is set to 2.0.
Given that extended support for .net 1.1 will cease in October of this year (http://support.microsoft.com/lifecycle/?p1=1249) I am trying to ascertain whether the site will still use any of the .net 1.1 framework assemblies given that the application is built and compiled in Visual Studio 2003.
I am assuming this is the case because although ASP.net 2 is set as the target framework
in IIS (and therefore the aspet_isapi.dll invoked is the .net 2 one etc) the assembly is a .net 1.1 assembly and will therefore still use the 1.1 framework. However, is this assumption actually true?
The website only has another year or so to live before being replaced by a new solution entirely so I would prefer not to upgrade it if possible and run the risks such changes bring with them.
However, we obviously can't run something on an unsupported version of the framework if any element of if that framework is actually being used.
Any thoughts would be appreciated.
Update:
It would seem that .net 1.1 is a core component of WS2k3 so you can't just uninstall it. I could have attempted to remove the ASP.net component but I don't think that would fully uninstall everything and given that the dev environment is shared I can't risk causing any issues right now.
However I have previously set everything up on my local machine (Windows 7/IIS 7), so I changed the application pool to point at .net 2 (it was already running in classic pipeline mode), uninstalled .net frameworks 1 and 1.1 and cleaned up the files left behind afterwards.
The result was that the site ran absolutely fine, which would suggest in an IIS 7 environment at least that I don't need to worry about upgrading given we are running under .net 2 within IIS.
It's not an ideal test as it isn't a mimick of our live environment. I'm going to post a question on MSDN and asp.net to see if any Microsoft folks can add anything more definitive. I will post back here with any updates.
Just because official support will end doesn't mean Microsoft will pull the plug and force an uninstall of .NET 1.1 via Windows Update. It only means that:
if a gaping hole in the framework's security is ever found, they'll not fix it;
There won't be redistributables for the next versions of Windows, and the next version of IIS won't run it.
So the application will still run in a year. If you leave the server alone, the application might run until the machine breaks of old age.
So my suggestion is relax, and focus more on the new solution.
I got the answer to this questions after reading this link (provided as an answer to this question on the ASP.net forums)
http://msdn.microsoft.com/en-us/library/ms994381.aspx
Under "Application Load Mechanisms and Possible Issues" it states:
By default, an application built using the .NET Framework will run using the version of the Framework it was built against if that version is installed on the computer
It then goes on to detail (for .net 1.1 and 2.0 at least) when a particular version of the framework is used.
Essentially, because our server has both 1.1 and 2.0 installed the application will still be using version 1.1. If 1.1 was not installed then it would run by default under 2.0, which explains why the web application still worked after I uninstalled .net 1.0 and 1.1 from my local machine.
Given that the live server is W2K3 and I can't remove .net 1.1, I will be rebuilding my application to target .net 4.0.
I have inherited a .NET Framework 1.1 web site that I must host with IIS 7 on Windows Server 2008. I'm having some trouble.
1. Installation
I installed .NET Framework 1.1 following these instructions.
The installation automatically created a new Application Pool "ASP.NET 1.1". I use that.
2. Trouble
When I launch the web site I see web.config runtime errors:
The tag contains an invalid value for the 'culture' attribute.
I fix that one and then see:
Child nodes are not allowed.
I don't want to keep playing this whack-a-mole game. Something must be wrong.
3. Am I sure this is .NET 1.1?
I examine the automatically created application pool. I see that it's 1.1.
Advanced Settings...
Basic Settings...
This doesn't seem right.
While 1.1 is set, it's not an option in the Advanced drop down selectors.
And why in the Basic box is it just "v1.1" and not ".NET Framework v1.1.4322"? That would be more consistent.
4. I cannot create other .NET 1.1 App Pools
I cannot select .NET Framework 1.1 for other application pools. It's not an option in the drop down selectors. What's up with that?
What now?
Why isn't v1.1 an option for all AppPools?
How can I verify my application is in fact using .NET Framework 1.1?
Why might I get these runtime errors?
A quick-fire way to find out if the application is running under 1.1 is to knock up a quicky script that displays the environment version:
<%# Page Language="C#" %>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
Response.Write(System.Environment.Version.ToString());
}
</script>
Or if you're getting yellow screens of death then you'll see the version number at the bottom of the page:
I suspect the reason you can't select Framework v1.1 when adding a new application pool or modifying an existing one is that the 1.1 installer doesn't know how to add some critical piece of metadata or config info to IIS.
.NET 2.0 ships with 2008 and .NET 4.0 being a later product is IIS7 friendly as well so there is most likely better IIS integration. Or, v1.1 doesn't have some essential nugget of metadata that IIS7's InetMgr needs to be able to add this to its various lists.
The reason you can see v1.1 in the drop downlist for the ASP.NET 1.1 pool Basic Settings dialogue and not the other pools is because it's already been set and so will just be included in the list. I experimented and changed this on the newly created ASP.NET 1.1 pool and set it to 2.0, saved, then re-opened. The result is that v1.1 isn't visible any more.
Additionally the reason it's called v1.1 and not .NET Framework v1.1.4322 is because the value is being picked up from the managedRuntimeVersion attribute in the app pool config in applicationHost.config. The reason that versions 2.0 and 4.0 show a full description is that there's probably some piece of IIS friendly metadata with a resource string being looked up that isn't present for 1.1.
To set a pool to use v1.1 at creation time you have to manually set the managedRuntimeVersion attribute using APPCMD.EXE:
appcmd add apppool /name:"NewPool" /managedRuntimeVersion:"v1.1"
This is explained at the bottom of the article you linked to.
To change an existing pool to use 1.1 you must also use the command line APPCMD.EXE tool:
appcmd set apppool /apppool.name:"SomeOtherPool" /managedRuntimeVersion:"v1.1"
Interestingly you can set managedRuntimeVersion to any old value:
I wish I could explain away why the ASP.NET 1.1 application pool magically gets created or how the installer manages to do the right thing with the handler mappings (somehow all the correct preConditions are set, so either the installer has been updated or IIS has some kind of trigger to look for 1.1 being installed and fix up things).
Update:
I contacted Bill Staples, the author of this article:
How to install ASP.NET 1.1 with IIS7 on Vista and Windows 2008
I asked him about how the 1.1 installer or IIS7 manage to do the right thing regarding handler mappings, creating the "ASP.NET 1.1" application pool and so on. This was his reply:
"If memory serves, in Vista/Windows 2008 there was an application compatibility shim created which would detect the 1.1 installer and do the app Pool creation/handler mapping.
However, in Windows 7 / Windows Server 2008 R2, .NET framework 1.1 is no longer supported and I wouldn't be surprised if this code was pulled, though I don't know for sure."
So mystery solved.
I encountered the same problems whilst trying to install an old .Net 1.1. on Win2k8/IIS7. In the end I found it was easier and quicker just to bump everything to .Net 2.0. I would recommend you do the same.
Unless your code is doing anything exotic the porting process can be carried out in day or less for reasonably large projects.
Windows 2008 doesn't have .NET 1.1 installed. You can manually install .NET 1.1.
I have trawled the internet - to no avail. Woe is me.
I have a .Net website running under a .Net framework 4.0 App Pool.
The website references various assemblies that have been compiled for .Net 3.5.
I have ensured that identical versions of the dll's and pdb's are in the bin folder of the the 3.5 code that I am trying to debug, and the reference path of the 4.0 web site. I.e. the code that I am trying to debug matched the assemblies that are loaded into the app pool's process.
When I attach the debugger using VS2008 with the solution for the .Net 3.5 code open, the breakpoints that I have set are marked as invalid (i.e. marked with an exclamation mark). When I hit refresh on a browser page that invokes the code that I am trying to debug, VS2008 raises an unmanaged code exception.
I have researched In-Process Side-by-Side code execution, which is what is occurring in this instance, and is working very well; but for the life of me I cannot find any information on debugging in this scenario.
It is not an option to convert the .Net 3.5 projects to use .Net 4.0, nor is it possible to convert them to use VS2010 and leave them targeting .Net framework 3.5
Any help will be greatly appreciated.
When an App Pool targets .NET 4.0 this means that your site runs under the CLR 4.0 and the assemblies compiled against .NET 3.5 are loaded in this CLR. VS2008 cannot debug processes running CLR 4.0, only CLR 2.0.
So if you want to debug either change the AppPool CLR to 2.0 or use VS2010 or even better use the Visual Studio's integrated server which you used to develop this site.
Hi I have web projects build in VS2003/1.1 framework and deployed in a webserver with IIS setting specified to 1.1 framework.lets say project X
I also have another web project which is build with VS2008/2.0. IIS setting - ASP version 2.0 is selected and all pages are assigned to run with 2.0* dlls. Lets say project Y
Now the problem seem to be when I hit project x, sometimes it throws errors like:
error BC30456: 'Initialize Culture' is not a member of ASP
During troubleshooting this issue, I browsed through 2.0 Temporary ASP.Net files "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\" and found temp files generated for project X. (HUH?)
How/why 1.1 project gets compiled in 2.0 only when it errors out.( or we could put it this way that it errors out every time it gets compiled in 2.0 which it is not supposed to)
I'm confused as to why this is happening when project X has nothing to do with .net 2.0.
Adding this info:
IIS version 6.0
I forgot to mention that project X works 95 percent of the time without any errors under 1.1. This error throws randomly which we could not recreate. The time the project error out is at the same time it gets compiled with 2.0
Are the two projects sharing the same AppPool on the IIS server? You need to have separate app pools for 1.1 and 2.0 processes running on the same IIS server.
When you install a .NET version, if you have IIS installed and are running ASP.NET, then the aspnet_regiis tool is run. This sets IIS to use the .NET version that you're installing.
The exact same thing happened to me about seven years ago. I installed a .NET 2.0 Windows Forms application on a production server, and immediately saw errors.
The solution is to run the .NET 1.1 version of aspnet_regiis.