It seems like there is a problem with the "System.Net.Http" dll.
I keep getting all kind of errors relating to it:
while trying to restore nuget packages (It seems like the framework can not connect to the nuget index:
Unable to load the service index for source https://api.nuget.org/v3/index.json.
even while trying to sign in to the microsoft account through the Visual studio 2019 community:
we could not refresh the credentials for the account ...
Could not load file or assembly System.Web.Http, Version=5.2.2.0
It seems like a system problem. Where should I look\locate this dll in system level ?
PLEASE HELP
The problem was a missing dll in the GAC:
In order to reach the GAC, type assembly as system variable in the run.
The missing dll should have been located in the System.Net.Http folder, in the GAC_MSIL (depend on the microsoft OS).
I took it from another source and located it there
Related
I usually dev on a windows 7 desktop, using visual studio 2015 update 3. I have the same vs2015.3 on my windows 10 laptop. I copied an asp mvc 5 app I am working on to the laptop but it wont run when I try to launch it from VS. I get the "aspnetcore.dll failed to load" error. I looked around and most solutions are to repair the asp net core install, but my laptop does not have asp net core installed on it, because I don't use core yet. My project is targeting .Net 4.6.
My desktop does have Core on it. So do I have to install .net core just because? Or is there some other solution? I am using the default IIS 10.
Found the solution - the applicationhost.config file had references to ASP.NET Core and was trying to load the non-existent module. I deleted the applicationhost.config file and reopened the solution, which forced VS to rebuild it without the ASP.NET Core references. Works fine now.
In my case with Visual Studio 2015, this file was located in .vs\config\applicationhost.config
For earlier versions of Visual Studio using IIS Express, see this question for more information about where applicationhost.config is located: Where is the IIS Express configuration / metabase file found?
Using VS 2015 (Windows 10). Working on a downloaded sample MVC app (from Intuit) targeting .net 4.6.1.
I was getting the exact same behaivior/error:
"The Module DLL C:\Program Files (x86)\IIS Express\aspnetcore.dll failed to load"
Locating the Applicationhost.config file (part of download package) and deleting it, did not solve the problem because IISExpress re-generated the Applicationhost.config file with the same references.
To solve the problem I had to comment out all the (aspnetcore.dll) references:
(configSections)
< section name="aspNetCore" overrideModeDefault="Allow" />
(globalModules)
< add name="AspNetCoreModule" image="%IIS_BIN%\aspnetcore.dll" />
(modules)
< add name="AspNetCoreModule" lockItem="true" />
You can do a search and comment out accordingly.
Installing the recently released Anniversary Update (version 1607) of Windows 10 seems to destabilize IIS by shutting down Application Pools, thus resulting in a 503 error when trying to run an application, which is caused by some DLLs failing to load when the worker process starts.
Check out the Windows Event Viewer (Win+X, V) to see what you need to fix: Open "Windows Logs", then "Application" and look for "Error" level entries with the source "IIS-W3SVC-WP" (may be different if the name of your IIS instance is not the default one). In the details, you will see a short message, like this:
The Module DLL <path-to-DLL> failed to load. The data is the error.
Depending on your configuration, there may be different DLLs causing this kind of problem and they will occur one by one, so you will need to keep checking the Event Logs and fix the issues until your application properly starts up. To be sure, before every attempt, stop IIS and close IIS Manager.
Here are two specific issues we've experienced so far and how to fix them, but you may bump into completely different ones:
1."C:\WINDOWS\system32\inetsrv\rewrite.dll" (reference) ◦Go to "Programs and Features" (Win+X, F) and repair "IIS URL Rewrite Module 2".
2."C:\WINDOWS\system32\inetsrv\aspnetcore.dll" (reference) ◦Go to "Programs and Features" (Win+X, F) and repair "Microsoft .NET Core 1.0.0 - VS 2015 Tooling ...".
Original source
For anyone coming to this later, what worked for me was this:
https://learn.microsoft.com/en-us/aspnet/core/host-and-deploy/iis/?view=aspnetcore-2.1&tabs=aspnetcore1x
I had to install the hosting runtime for aspnetcore (my team's using core) and that fixed my local IIS issues.
Deleting the applicationhost.config did not work for me.
My service was forced to run in 32bit mode, and my aspnetcore was 64 bit.
Since I'm currently not using .NET core I could comment out all references to aspnetcore in the applicationhost.config file and then restart iis.
I am using MVC app having .net 4.5 and it was working fine in, 4 days back windows 10 update has happened and my IIS setting has gone.
After that i couldn't able to run my MVC app in Visual studio and it starts giving
Could not load file or assembly
'System.EnterpriseServices.Wrapper.dll' or one of its dependencies.
is not a valid Win32 application. (Exception from HRESULT: 0x800700C1)
Every time, and don't understand what could be the reason, i searched so many posts, links, solutions are like moving dlls, etc.
Can somebody give my what is the reason and how can solve it
this might help system enterprice services error
Also, it might be worth re-installing the latest updates to Visual Studio as these often get corrupted on operating system updates.
I have a project which works fine. This morning, I created a new TFS project and published all the code from Visual Studio 2015.
On another computer, also via VS2015, I've logged into Visual Studio Team Services to grab the same project and downloaded all the code
When I try to build, there are over 100 errors, but the cause appears to be the same. It can't find resources, and the error messages all appear to be
The type of namespace name 'some name' does not exist in '....' (are you missing an assembly reference?)
So, I expand the References and I'm missing pretty much all of them. In fact, other than the references within my own project, the rest are not there
Looking at the properties shows no path. Back on the original PC I see the path to any of the .dlls is similar too
C:\Users\Me\Documents\Visual Studio 2015\Projects\MyProj\ToT\packages\Antlr.3.5.0.2\lib\Antlr3.Runtime.dll
Is the issue that since this path doesn't match on the 'faulty' machine it can't show... Therefore what is the solution to this
I checked and noted that the files do appear to exist when I look at them in File Explorer.
All system references missing Visual Studio 2013 NuGet Async did not help
Please note, this happens with all projects in my solution, but not consitently. For example, EntityFramework is missing from all, but System is missing from my UI layer, but not from my BLL layer
Is there a way to fix this?
You need to run the update-package -reinstall command to reinstall all referenced packages.
I had the same problem, there are lots of answers by now but I will still post it here:
1.Close Visual Studio
2.Manually delete the local “packages” folder
3.Reopen the solution, and rebuild. (Nuget should restore the packages)
Source:
http://robertgreiner.com/2013/09/team-foundation-service-build-error-nuget/
Go to TOOLS -> nuget package manager -> package manager console -> and run to the console : UPDATE-PACKAGE -REINSTALL .
Clean your solution, rebuild and you are ready!
Sounds trivial but your missing references to system.xxxx could imply a problem with the .NET Framework, what version are you using and is it installed properly on your 'faulty' machine. Might be worth a re-install/repair? I'd check what versions are actually referenced too.
As for NuGet, make sure that Enable package restore is set as:
Also, I had a problem similar to this once and I had to upgrade the NuGet package manager to version 3 in Tools -> Extensions and Updates (You need to uninstall and then re-install as update won't work)
Finally if that doesn't work, check in File Explorer in the packages path and delete all packages. They should not be included in source control as this is what NuGet will download. If they are there or partially there, sometimes it will not download them.
Verify the .NET version:
Open the project properties pane and check the Target Framework:
Ensure this version of .NET is installed. OR change the target framework to a suitable version
First, go to VS--Tools--Extensions and Updates to check whether there are updates, install all updates. Then select one reference with a warning icon, check the Specific Version property, if the value is True, change it to False.
If the issue persists, check the Reference Assemblies of .Net framwork on your two computers, to see whether they are under the same location (the .Net framework is supposed to be under *C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework*).
=========================================================================
11/5: To avoid references missing, you can either check in all references to source control and reference from the source controlled ones, or use Nuget Package Manager to install packages. The previous is not recommended now, try Nuget Package Manager.
Before hitting your head against the wall with the million of Nuget 'fixes' you need to make sure you are getting ALL the DLLs that are in your Bin folder under source control. For some reason a simple "Get Latest Version" is not enough. Visual Studio will keep telling you all files are up to date but apparently this doesn't mean all the files under source control are downloaded (or it does and what happened to me is just a sassy bug). Anyways, to make sure you are truly "getting all" you need to force an update by using the "Get Specific Version" command with the "Overwrite all" option checked as VS suggests. To do this:
Go to your Bin folder in Source Control Explorer (Or w.e folder you truly want to get all)
Right Click > Advanced > Get Specific Version
Check the "Overwrite all files even if the local version matches the specified version" checkbox
Click Get
By doing this I ensured all the referenced DLLs were downloaded from TFS and for me that solved the problem. I'm using Visual Studio Enterprise 2015.
Is it possible to import an already existing Umbraco site into Visual Studio? (By means of getting all the site files and DB backup)
I've tried creating an empty project and copying the website files, but I get several errors when I try to compile the solution. The errors look like "Could not find scheme information for the element 'umbracoConfiguration'."
The same happens if I create an empty solution, add the UMBRACO nuget package, and then copy the website files.
I'm wondering if it is at all possible, or if once an UMBRACO website is running, how should one customize/develop on it?
THANK YOU!
After several attempts and trial and error, as well as reading other blogs, the way it worked for me was to go in Visual Studio -> File -> Open -> Web Site... and select the main folder containing all the files.
It is important to know that the web.config had to be modified in advanced for the website to work to point to the local server and off course attach the DB to the local SQL server.
Everything works perfectly just the way it was working on the host, and I have the solution in Visual Studio.
I like to start with nuget because it handles setting up all of my project references. I create a new MVC4 Web Application
Visual Studio->File->New->Project->MVC4 Web Application
After I create the new application, I open the Nuget Package Manager Console
Tools->NuGet Package Manager->Package Manager Console
I then enter the command:
Install-Package UmbracoCms.Core -Version 7.2.1
I find that installing the UmbracoCms.Core instead of the whole UmbracoCms nuget package is best because it only sets me up with the umbraco dlls and sets up the references for me. The UmbracoCms nuget package tries to do a lot more and is more handy if you are setting up a brand new umbraco site in Visual Studio.
Once I have nugetted the appropriate version of umbraco, I copy my existing umbraco site files over the files that were nugetted. When you copy all of the files over, don't copy all of the App_Data. Most of the files in that directory are TEMP files and cache files. From App_Data, only copy the following. This will save you time reindexing the site. I suspect a lot of the App_Data files were responsible for your Object Null Reference.
App_Data/access.config
App_Data/packages/*
In visual studio, in the solution explorer, click "Show All Files", and then include the appropriate files in the solution. Rebuild the solution, and you should be set up for development.
I've been trying to run my build on TFS and I keep getting an error that kills my build. What's strange is that nothing except code change has been done since the issue started (Or at least that I'm aware about). I keep seeing this:
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Microsoft.WinFx.targets (268): Unknown build error, 'Cannot resolve dependency to assembly 'System.Windows, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event.'
I've googled this and the only thing I see is that it's because there's a Silverlight dll being used in a WPF application. My application is a WPF project, but I haven't been able to find any changes being done in any of my projects in my solution in regards to references.
For more information, this project is a branch from the main code. The main development branch runs fine, but for some reason, this build just fails.
Any ideas?
It seems like you're referencing the Silverlight version of System.Windows instead of the .NET Framework version. Have you tried installing Silverlight on the build server or changing the reference of your project to point to the normal .NET Framework version of that assembly (which .NET Framework exists on your build server)?