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I feel guilty asking a question like this around here, but I'm at a loss and would appreciate some help.
A proof-of-concept like web application was built on one PC and put up on a repo to download on another PC at a different location. There was originally an auto-build feature set up where Azure would build and publish automatically on check-in, but that was removed. Things were working on both ends until one side included a bulk of excluded changes. Now I'm seeing the following error:
The "Microsoft.CodeAnalysis.BuildTasks.Csc" task could not be
loaded from the assembly
...\packages\Microsoft.Net.Compilers.1.0.0\build..\tools\Microsoft.Build.Tasks.CodeAnalysis.dll.
Could not load file or assembly
'file:///...\packages\Microsoft.Net.Compilers.1.0.0\tools\Microsoft.Build.Tasks.CodeAnalysis.dll'
or one of its dependencies. The system cannot find the file specified.
Confirm that the declaration is correct, that the assembly
and all its dependencies are available, and that the task contains a
public class that implements Microsoft.Build.Framework.ITask.
Does anyone have any suggestions on where to begin looking for the issue?
It turns out that NuGet packages were committed to the repository and breaking everything. Deleting the project\project\packages directory from the repo solved all build problems since NuGet fetches the packages automatically on build.
I got this error when I created a new branch for my project.
It drove me crazy for an hour. I tried most of the suggestions over the internet including the accepted answer to this question.
I then closed the project, opened it again, cleaned it and the error is gone. So this means this could be cache issue.
Anyways, just wanted to share.
I too tried the top answer with no luck so deleted the contents of my bin and packages dir, closed and re-opened VS and everything fine now.
I have tried all solutions described before, but none worked.
What solved it for me, was to update the Microsoft.Net.Compilers from the NuGet Package Manager
Right-click on your solution.
Go to Manage Nuget Packages.
Search for Microsoft.Net.Compilers.
Install or update on dependent projects as necessary.
Re-build, clean solution and restart Visual Studio worked for me.
Deleting the package and cleaning the solution solved it for me.
Deleting these three directories solves the problem.
/packages
/bin
/obj
NOTE: delete both /bin and /obj from all projects included in the solution (including Test projects).
Problem hides on TFS, you need to remove folder TestProject...\packages from TFS, check in, delete it from your local dir and build again. Worked!
Use the below step:
1) Delete the package folder.
2) close the visual studio.
3) open the project and rebuild the project.
I delete all from packages folder and rebuild solution. It's worked for me.
In my case: this works for me.
It turns out my teammate had already started looking into Windows 10 development and had Microsoft Build Tools 2015 installed on his machine.
I installed the software from https://www.microsoft.com/en-us/download/details.aspx?id=48159 and the problem was solved.
In my case, the solution was:
Use Windows Explorer and navigate to the offending path:
C:\MyApplication\Code\Main\ABCProject\ABCProject.UI\Bin
Right click on bin folder > select properties > Uncheck ReadOnly.
In my case, the solution was:
Right Click on Solution.
Go to Manage Nuget Packages for this Solution.
Search for Microsoft.CodeDom.Providers.DotNetCompilerPlatform.
Uninstall the searched Package.
Restart the Visual Studio.
I just tried this on a clean install of a Windows 10 machine and the issue for me ended up being that I didn't have the .NET 3.5 framework installed. This stackoverflow question helps explain why.
Cannot build WIX project on windows 10
Right Click on Solution.
Go to Manage Nuget Packages for this Solution.
Search forMicrosoft.Net.Compilers on Browse Section.
Deleting the bin folder worked for me
In vs2017 community there appeared a new item in the "build" menu. It disappeared after I used it and was called something like "Optimise project build packages". I clicked it and it fixed everything, just restart etc. I did it on two machines.
What it did was removed Microsoft.net.compilers 2.10.0 and replaced with Microsoft.CodeDom.Providers.DotNetCompilerPlatform 2.0.1
So there you go - more automagic...
My project was built with .Net Core 2.2 but I had .Net core 3.0 preview installed. I uninstalled .Net Core 3.0 from my system and went through all my class libraries, removing Microsoft.Net.Compilers 3.0, then rebuilt and it worked.
I moved my solution from one drive to another, and one of the files could not be copied because "in used", for which I click ignored, producing the error described in this post. Copying the missing file manually fixed it.
file: Microsoft.Build.Tasks.CodeAnalysis.dll
Destination directory: packages\Microsoft.Net.Compilers.2.1.0\tools
For me I was trying to open a MVC5 project in VS 2013 and I was getting this error, Opened it in VS 2017 and up it worked just fine.
"Type 'HR.Database' is not defined'
I get that error for several classes that are stored in the App_Code folder in the Error List panel when building my project.
It is a class I wrote with namespace HR
How can I reference it or alter the project to recognize those classes and remove the error?
I thought I should reference it but when trying to add a reference there are no items in the list of projects. Also, they are .vb files and not a .dll
I wasted the better part of a working day on this problem before figuring it out...
When you add files to App_Code, Visual Studio sets the "Build Action" property to "Content", instead of "Compile" which it does for all other classes. So your classes don't get compiled, and then VS complains that it can't find them. Presumably this is VS' way of saying that App_Code is not where you should put your app code, reasonable as it may appear.
The solution is to right-click on each file and reset "build action" to "compile". This also has to be done whenever you add files. Or you could submit to VS and put your source somwhere else.
< /frustration>
Since it's late and over 3 years old. I came across a similar issue. The solution above is perfect.
With newer VS IDE versions, go to App_Code file's properties and update the Build Action to 'Compile' if it's set as 'Content'. Using App_Code folder may be outdated in newer VS versions but some older developers still use the folder.
Replace vbproj and vbproj.user with your backup
My issue wasn't the App_Code folder in particular, but I was getting "not defined" errors in my Errors List until I double-clicked to open the file, then references would resolve and that error would disappear without me doing anything more, but when I tried to rebuild, all these errors would appear again.
The only real clue I had was that they were all related to the same project and when I dug through my Output window, I could see there was a conflict on the .Net framework versions. Once I resolved the version difference, the errors disappeared.
I was getting this issue for a slightly silly reason, but it might help for others to learn from my pain. :D
I was making the changes to the code in a tab of my test program, but that tab was for a VB file in a DLL I was using. Since those changes weren't being made/compiled in the DLL, it wouldn't find the class no matter how hard I tried until I opened the DLL project, made the changes there and rebuilt the DLL.
I had the same issue in Visual Studio 2019 but the .vb file already had "Compile" in properties > build action
I had tried rebuild, clean, deleting the file.
If I copied an existing class into this folder it would also not be recognised
Closing visual studio and restarting it fixed the issue, so there's a bug in VS where it doesn't compile files in a new folder until VS is restarted
I have a Web Application project in VS 2012 and when I use the web publishing tool it builds successfully but doesn't copy any files to the publish target (File System in this case).
If I look at the build output I can see everything gets copied over to obj\Release\Package\PackageTmp\ correctly but then all I see in the build output is this:
4>Done building project "{Project}.csproj".
4>Deleting existing files...
4>Publishing folder /...
4> ========== Build: 3 succeeded, 0 failed, 1 up-to-date, 0 skipped ==========
========== Publish: 1 succeeded, 0 failed, 0 skipped ==========
Even though it says the publish succeeded there are not files in the target directory for the publish.
I have seen this in multiple projects and sometimes it seems like the Solution/Platform configurations cause this problem but I haven't been able to pinpoint an exact cause for this.
Has anyone else seen this happening or have an idea on how to get this working correctly?
UPDATE:
I may have found a workaround for this. I just had this happen again and I was messing around with the publish settings. Once I changed the selected Configuration on the Settings tab away to another configuration and then back to the one I wanted to use all my files started publishing again. Hopefully this works on other projects in the future.
UPDATE 2:
I posted a bug on Microsoft Connect and heard back from a developer on the VS Web Developer team. He said they have fixed this issue in their internal builds and will releasing an update to the publish tool soon that will fix this problem.
UPDATE 3:
This has been recently fixed with Visual Studio 2012 Update 2
Same problem. The workaround was changing the publish settings from Release to Debug. Re-publish and then change back to Release...
This may be caused by solutions/projects that were created with the RC of vs2012. This happened to me months ago and fixed the problem by making sure my solution build configurations matched my project configurations...
I just recently experienced the same problem when opening the same solution originally created in vs2012RC with VS2012 Express for Web. I did exactly what the original poster suggested and it fixed my problem.
Here is the thread that lead me to the answer:
connect.microsoft.com/VisualStudio/feedback/details/746321/publish-web-application-fails
The pertinent response from the conversation above that helped me was:
Posted by Microsoft on 6/13/2012 at 12:00 PM Hi Andrew,
This was a bug in how we handle the solution configuration vs. the
project configuration. We incorrectly assumed that they would be the
same (e.g. Solution's Release|x86 would have each project set to
Release|x86 as well), which caused us to use the wrong build
properties for publishing files.
The workaround is to make the solution configuration and build
configuration match. This issue will be fixed in the next release of
Visual Studio 2012.
Thanks,
- Jimmy Lewis SDET, Visual Web Developer team
To take this a bit further. You have two files that are created when you create a publish profile.
NewProfile.pubxml
NewProfile.pubxml.user
When you open a project that has these files in the PublishProfile folder from a source control it only has the .pubxml file and not the .publxml.user file, so it creates the .publxml.user file on the fly when you open the project.
When it creates the new .publxml.user on the fly the xml looks like:
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
</Project>
When you create a new profile it creates xml that looks like:
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<LastUsedBuildConfiguration>Release</LastUsedBuildConfiguration>
<LastUsedPlatform>Any CPU</LastUsedPlatform>
<TimeStampOfAssociatedLegacyPublishXmlFile />
<EncryptedPassword />
</PropertyGroup>
</Project>
If you take the <PropertyGroup> node and put it in the .pubxml.user file your PublishProfiles will start working again.
An easy fix is to delete your publish profile and create a fresh one.
when you right click on your solution and select publish, you have a profile set. delete this and create a new one.
this will fix it.
I had this problem from switching from 2010 to 2012
I had same error and I change the setting from release to debug and the problem resolved..
I had this same problem however none of the answers in this thread worked for me. My issue was that there is a directory that contains dynamically generated (by my app) static HTML files. The entire directory was not being published.
The solution that worked for me was found here:
One issue I got a while back and thought I should document was that certain file types were not being uploaded when I published my project.
The file types in question were .pdf files and .rtf.
The reason this happened was because these file extensions were not recognized as requiring publishing by Visual Studio. Luckily this can be changed in Visual Studio.
Select the file(s) that aren’t being copied. In Properties ensure that Build Action is set to Content.
If this doesn’t work the following can be tried.
Under the Project menu select Package/Publish Web and notice this drop down:
Try changing this to All files in this project folder.
This is because the .pubxml.user contains required information to publish, and that file isn't (and shouldn't) be included in source control. To fix this VS bug, copy the information from the .pubxml.user file to the .pubxml file. The relevant properties are:
<LastUsedBuildConfiguration>Release</LastUsedBuildConfiguration>
<LastUsedPlatform>Any CPU</LastUsedPlatform>
Put those in your .pubxml and you should be good to go.
I tried all of these solutions but this is the one that works every time.
We just change the "Publish method:" from "File System" to for example "Web Deploy", and immediately change it back to "File System".
I have (had) the same problem for several projects. The only ones hit seem to be web projects. Deleting and recreating the profile solves the problem only once. Additionaly, comparing the publishxml generated yields no differences, so it does not seem related to the profile at all.
The workaround mentioned by OP to change build problems back and forth seems the only reliable solution at this time.
I ran into the same problem on VS 2010, after checking publish output, event logs, turning on and checking visual studio logs etc I then decided to remove the web publish (via add/remove) which I believe had been recently updated to v1.0.30810.0. This resolved the problem.
Here we had the same problem.
We just change the "Publish method:" from "File System" to for example "Web Deploy", and immediately change it back to "File System".
The following worked for me:
Simply change from Release>Debug>Release (or vice-versa) and then publish.
No need for deleting, editing, publishing anything you don't need to.
My problem was in wrong configuration of myproject.csproj file. '_address-step1-stored.cshtml' file did not copy on publish. 'None' changed to 'Content', now it's ok.
Same problem with VS 2012 Pro with a disk publish target. Project used to publish correctly but started doing this issue where it failed to copy the files to the destination folder.
Solution was to edit the publish profile, change the mode from Release (Any CPU) to debug then back to Release (Any CPU). Doing this causes the PublishProfiles\projname.pubxml.user file to be rewritten (as described above). Looks like it added the LastUsedBuild,LastUsedPlatform and TimeStampOfAssociatedLegacyPublishXmlFile elements under the propertygroup node. After the publish is complete, it adds another ItemGroup with individual files and publish times.
For what it's worth, I eventually gave up on fighting with Web Deploy to get it to do what I wanted (copy deployable files and nothing else), so I scripted it in PowerShell and am really happy with the result. It's much faster than anything I tried through MSBuild/Web Publish, presumably because those methods were still doing things I didn't need.
Here's the gist (literally):
function copy-deployable-web-files($proj_path, $deploy_dir) {
# copy files where Build Action = "Content"
$proj_dir = split-path -parent $proj_path
[xml]$xml = get-content $proj_path
$xml.Project.ItemGroup | % { $_.Content } | % { $_.Include } | ? { $_ } | % {
$from = "$proj_dir\$_"
$to = split-path -parent "$deploy_dir\$_"
if (!(test-path $to)) { md $to }
cp $from $to
}
# copy everything in bin
cp "$proj_dir\bin" $deploy_dir -recurse
}
In my case I'm calling this in a CI environment (TeamCity), but it could easily be hooked into a post-build event as well.
This action was successful for me:
Kill Publish Profiles in "Properties>PublishProfiles>xxxx.pubxml" and re-setting again.
I found the I could get around this problem by changing the target location from obj/[release|stage|..] to a new path outside of the solution folders completely eg c:\deployment. It seems like VS 2012 was getting confused and maybe giving up somewhere during the publish process.
Matt
Had the same problem recently in VS 2013 for a MVC project in which I imported Umbraco CMS. I couldn't publish. The answer above helped, though I needed a while to figure out what I actually should do in VS. It needed some research e.g. on MS blogs to find out. I try to say it simple:
Choose in the VS toolbar a certain configuration e.g. Release and Any CPU. Run the project.
Afterwards right-click in the Solution Explorer on the solution in question, choose Publish. Create a new publishing profile or use a given one, but always make sure that in the settings the same configuration (e.g. Release and Any CPU) is chosen, as before you run the project the last time.
Additionally in my case it was necessary to delete the OBJ folder because here the settings from my last unsuccessful tries to publish got stuck, though I restarted VS and deleting all publishing profiles.
I have a Web Application with several other referenced Projects in the Solution. I've deployed successfully with a single Publish configuration many times in the past. I changed the Project Configuration from Debug to Release for a Project that had been missed in the past. The next time I attempted to deploy I got these symptoms, where the Publish just quietly fails - it does nothing and says it succeeded:
1>------ Build started: Project: Project, Configuration: DeployProduction Any CPU ------
1>
2>Publishing folder /...
========== Build: 1 succeeded, 0 failed, 9 up-to-date, 0 skipped ==========
========== Publish: 1 succeeded, 0 failed, 0 skipped ==========
The only way to recover it was to wipe out the Publish profile, close Visual Studio to force it to save the deletion, reopen it, and recreate the Publish profile from scratch. Once I did that I could Publish fine again.
Win8 VS2012, crappy laptop.
In Visual Studio 2012, switching between releases still causes problems.
We added a pre-build event to delete the obj folder: del /s /f /q $(ProjectDir)\obj and it fixed the issue of publishing. Cleaning works sometimes, but not always.
I finally found the answer by myself. All of the above solutions doesnt work for me.
What i had done is that i move the project to drive c change the project folder to something shorter and boom it publish..
the reason that it failed on my side is that i had very long project name/heirarchy.
C:\Users\user\Desktop\Compliance Management System\ComplianceIssueManagementSystem\ComplianceIssueManagementSystem
I had thought of this because sometimes when i extracted rar file it says that the name/path is too long. I thought it will be the same as visual studio 2012 publish. and it does!
hope it will help you guys.
Check your current project that whether you have made back copy with same class name and different page name (Class name will inherit copied file). Ultimately that will confuse the compiler!!!
CodeFile="Consolidated.aspx.vb" Inherits="Consolidated
None of the above solutions worked for me.
But I noticed that of our five ASP.NET MVC projects in our main solution, four of them put the deployment package in the right place, while one left it under obj\Debug.
I compared the projects and found a discrepancy. The solution was to change this:
<Import
Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v10.0\WebApplications\Microsoft.WebApplication.targets" />
to this:
<Import
Project="$(VSToolsPath)\WebApplications\Microsoft.WebApplication.targets"
Condition="'$(VSToolsPath)' != ''" />
<Import
Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v10.0\WebApplications\Microsoft.WebApplication.targets"
Condition="false" />
After I made this change, all five projects put their deployment packages in the right spot.
(Sorry about the long lines, but I couldn't find a better way to condense them.)
I encountered this with Visual Studio generated Service Reference files becoming too long in terms of the overall path length.
Shortened them by re-generating the Service Reference using svcutil.exe, deleting all the original Service Reference files.
svcutil can be called like this:
"C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools\SvcUtil.exe" /language:CS http://myservice /namespace:*,My.Namespace
My.Namespace should be replaced with the existing namespace in the generated service proxy (typically found in the Reference.cs file) to avoid compilation errors.
http://myservice should be replaced with the service endpoint url.
I've got into same problem. None of the above solutions worked for me.
So, I've excluded the files which failed to copy while publishing.
I had published the website several times. But one day when I modified some aspx file and then tried to publish the website, it resulted in an empty published folder.
On my workaround, I found a solution.
The publishing wizard will reflect any error while publishing but will not copy any file to the destination folder.
To find out the file that generates the error just copy the website folder contents to a new folder and start the visual studio with that website.
Now when you try to publish it will give you the file name that contains errors.
Just rectify the error in the original website folder and try to publish, it will work as it was earlier.
Follow these steps to resolve:
Build > Publish > Profile > New
Create a new profile and configure it with the same settings as your existing profile.
The project will now publish correctly. This often occurs as a result of a source-controlled publish profile from another machine that was created in a newer version of Visual Studio.
FIXED - various solutions offered didn't work for me. What did work for me with VS Community 2017, Windows Server 2012 R2 was to change the TEMP and TMP environmental variables for the user and then restart the system and deploy again (restarting VS was not enough). These temp variables are where VS does the temp publish.
Restarting visual studio after changing temp variables didn't do the trick, had to reboot system.
Try quitting Visual Studio, delete the relevant pubxml.user file in your PublishProfiles directory, restart VS and publish. Worked on VS 2019.
First:
Build in release Configuration.
In Project Properties-> page select All files and folders under
Package/Publish Web.
Rebuild solution (after Clean solution).
now publish.
While publishing recheck what u have opted.
this should do it. It did for me!:)
I'm trying to publish an ASP.NET project in VS2010, and am getting the following error:
Copying file bin\CKFinder.pdb to obj\Release\Package\PackageTmp\bin\CKFinder.pdb failed. Could not find file 'bin\CKFinder.pdb'.
I had tried using a trial version of CKFinder (with CKEditor), but I backed it out. I removed all references to CKFinder, including the folders and the references - or so I thought.
Why is this error coming up? Ideas?
I also bumped to this problem. I was receiving the following error, when trying to publish MVCForum 1.7:
Copying file App_Data\NuGetBackup\Hello.txt to obj\Release\Package\PackageTmp\App_Data\NuGetBackup\Hello.txt failed. Could not find file 'App_Data\NuGetBackup\Hello.txt'.
François Breton's comment helped me achieve the solution.
It's simple:
Open your .csproj file with a text editor (Notepad, Notepad++) Visual Studio will open it as a project.
Press Ctrl + F and search for the file of the problem. In my case the file was "Hello.txt" without commas.
Under the <ItemGroup> it resided:
<ItemGroup>
<Content Include="App_Data\NuGetBackup\Hello.txt" />
<Content Include="Content\admin\Admin.css">
<DependentUpon>Admin.scss</DependentUpon>
</Content>
...More code omitted due to brevity.
I deleted the <Content Include="App_Data\NuGetBackup\Hello.txt" /> line, and voila! Visual Studio allowed me to Preview before publishing!
It will end like this:
<ItemGroup>
<Content Include="Content\admin\Admin.css">
<DependentUpon>Admin.scss</DependentUpon>
</Content>
...More code omitted due to brevity.
Update: I went into Project --> Package/Publish Settings, and clicked "Exclude generated debug symbols." The project began publishing with no issue.
Update #2 (this is probably the better answer): I tried to publish as debug instead of release (yes, I wanted to keep the debug features in this particular release), and the error came up again. It turned out that I did not exclude the CKfinder.dll from the project. Once I did so, it ran with no problem.
Me just removed yellow marked file from my visual studio solution & it worked greatly for me because files were added and removed many times from folders but its not removed from VS solution project.
Delete file showing exclamation mark in the solution explorer. It worked for me
I ran into same problem, i just clicked show all files, and deleted the files that had exclamation mark with them. Hope this helps someone.
Right click on your project => unload project => right click again on your newly unloaded project => edit 'myProject.csproj' => Search for the offending files (CTRL + F) and remove.
If the error appears again within the same parent directory, but now under a different file name, it could be that a user has mistakenly included a file in the project (like I did). All files under the offending directory can be removed. This should solve the problem.
In my case I got a similar error but with .cshtml files like this:
copying to Views\Home\About.cshtml to
obj\Release\Package\PackageTmp\Views\Home\About.cshtml failed. Could
not find file 'Views\Home\About.cshtml'
Looking at the Solution Explorer tree everything seemed fine with no yellow markings but when clicking on a file it gave an error.
The item 'About.cshtml' does not exist in the project directory. It may have been
moved, renamed or deleted.
Removing the files from Solution solved it for me.
You must exclude bin folder from project, then republish your project. the way can solve my problem
I mistakenly included obj Folder to Visual Studio Project. Excluding Obj folder from project fixed my issue
Check for bin folder is added in vs explorer. If it was there then exclude from project and check. It worked for me.
I had files inside of my directory I intended to publish to. Deleting these allowed for a successful publish.
Another solution is to delete publish profile, this error happened to me after I deleted 1 of the EF DbContext. The solution keep track of that file inside publish folder, I recreated the profile and publish successfully.
My error was this
No DbContext named 'xxxx' was found.
These problems occur when the bin file is included in the project, note that if the bin folder exists in your solution, exclude it.
When using Visual Studio 2008, when I "Publish Web Site", the application builds correctly, but then I get a "Publish failed" message:
What possible reasons are there for this, and how can I prevent it?
I had the same issue. Nightmare to identify the problem, because the logs and outputs show no errors or failures. I simply get "Build: 39 succeeded" and "Publish: 1 failed".
I resolved the problem by systematically removing all NuGet packages one at a time (and removing code that references it) until I identified the offending one.
This takes a LONG time!
However, the answer for me was Microsoft.Net.Compilers.
No idea how I ended up with that in my project, but as soon as I removed that package, everything publishes fine again.
Edit - For what it's worth, this problem occurs on VS 2008, 2012 and 2015 but does not occur on 2017.
You can try this:
Perform precompilation against the web application.
Clear the target directory(virtual directory in IIS or physical file
folder) and deploy all the files (of the web application) into the target
directory.
In the output window you can check at which stage does the publish website
operation fail. For example, at the first stage, if there are some error
which will only occur at precompilation, that will cause the stage 1 fail.
Or some times if the target directory has something configured incorrectly.
Such as the IIS virtual dir is not set to the correct ASP.NET version or
some old files are locked and prevent them from being cleared. Mostly,
publish failed will be caused by IIS side configuration issue such as
authentication setting....
Source link
You can open the output window by pressing Ctrl+W, O.
Sometimes it's because you need to be running VS as Administrator to be able to write to the target directory.
Check the Output messages, they should help you solve the problem
I had to copy project to C:\a\ and than publish. I suspect problems with long path. Strange, but worked for me.
The conclusion is: Try another VS edition and see if that does it.
Here is what did it for me.
I have VS 2013 Pro and Visual Studio 2015 Community. I sort of use one or another to work on my MVC project and all was fine. Then all of the sudden VS 2013 could not publish though it would build just fine. There was no erros other than some silly ...code is not returned from all paths...
So when I open it in VS 2017 - it published the same project just fine. I am suspecting a compiling issue - because that was the stage it would fail at.
Hope that helps you save a bit of time.
Not sure if this happens in different versions of Visual Studio, but at least in 2015 Professional Edition, the problem arises when we try to update all Nuget packages from the solution using the Packages Manager.
As pointed out by #SimonGoldstone the issue is caused by the package "Microsoft.Net.Compilers". By default, the package gets added to the solution while creating a new web application. The default version 1.0.0 does not introduce any problems. I was able to keep testing with latest versions until 2.4.0 and everything works fine, but from 2.6.0 henceforth is when it all starts. If an update is strictly required, I would recommend updating the aforementioned package until version 2.4.0. After doing some research, seems that some bugs on later versions than 2.4.0 are introduced and not fixed on the long term. What is curious though, is how this problem gets included on Nuget with no basic quality control checkpoint.
There are many proposed solutions for this. I think they are overcomplicating the issue.
I found the following worked for me:
Locate the obj(Release or Debug) folder in your solution
Inside the Release or Debug folder delete the CONTENTS of the 'AspnetCompileMerge' folder
Now try and publish.
Make sure you empty the target folder (manually) before publishing. Sometimes vs cant delete a file which will result in a failed publish
After trying a Rebuild, having other Projects in my Solution able to publish correctly, and changing my publish location to the C: drive (locally attached) instead of pushing to a mapped network drive, I was still having an issue where the only error output said:
========== Build: 5 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
========== Publish: 0 succeeded, 1 failed, 0 skipped ==========
My solution is targeting x86, but I think during a Git Merge, this project had it's profile switched to Any CPU. After creating an x86 profile for the project and having it match the target of the publish goal and of the active solution configuration, I was able to successfully publish again.
Check Project BIn directory. there must be a DLL of your page or control. which has to be recreated during publish. So exclude it or remove it
I ran into this same problem today and it was due to the Thumbs.db file that was created when I opened my images folder to look for an image. I deleted the file and the project deployed successfully. Hope this helps someone else in the same situation.
Delete publish profile and create another one . Worked for me
In my case, I was publishing to a directory in a mapped network drive, but the Output panel/window was indicating that the location didn't exist. The path was correct, and the drive was fully accessible. The problem resolved itself when I re-set the path to publish to in Visual Studio by using the ... button.
With me it was simple - the dist folder was locked. I unlocked it by an unlocker and the publishing resumed.
I have several user controls that are registered in the web.config, and have a ClassName in the .ascx file header. For normal builds everything works fine, but with a publish those class names were not recognized anymore. At some point I found out that the errors were not in my regular code files, but in copies in a temp directory for publishing.
I had "Precompile during publishing" turned on (to be found under Settings > File Publish Options). Turning that option off worked for me.
I had the same issue with VS2017 with a website project. Build worked, but publish gave me an error:
Error CS0012: The type 'System.Net.Http.HttpMessageHandler' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Net.Http, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
All my projects already had a reference to System.Net.Http so it was really confusing.
To fix it, I had to copy System.Net.Http.dll into my website project / bin folder so publish could find it and copy it to my web host. I found System.Net.Http.dll by looking at another project's references (a class library), then System.Net.Http.dll Properties, and seeing the path (C:\Program Files(x86)\Reference Assemblies\Microsoft\Framework.NetFramework\v4.6\System.Net.Http.dll).
i know iam late but i think it should use for someone whos searching for this query.
just uninstall all your nuget pakages , then clean and rebuilt solution ,
now click on publish , sure it works and u will see publishing starts and works correctly now
If any one had changed the version of the project file and related framework. then this type of issue happened.
please go to "C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Microsoft\VisualStudio\v16.0\Web" location for visual studio published and build setting -> edit -> comment the force copy of all file section.
I had one file that was not found. I had copied in a png file to replace a jpg in the content folder , same name except filetype extension.
Project built fine, but refused to build and publish . changed extension of file so it could find that file name and it worked - no errors amazing 1 thing wrong and everything else is an error.
The case for me was that Visual Studio was not signed in to Azure, but provided no indication of that. I edited the publish profile, clicked "Validate Connection" then clicked "Save" and then it worked.
I was working on a feature branch, which was failing. Switched to Master Branch, deleted the feature one and created another one. It worked.
What caused my issue was a little different, but has similarities to some of the reasons stated above.
I managed to trash my local copy of a given application and did a GIT hard reset to get the most recent from the repository in question. This in turn, wiped out the web.config file (which was not stored in the GIT repository for various reasons).
This cause configuration information for various NuGet packages to be "lost" (since it was stored in web.config).
Fortunately, I had "backed up" the web.config, so once I figured out it was not out there (a migration failed because I was unable to connect to the database), I was able to replace it.
Tried the publish again, after fixing the web.config, and everything worked perfectly.
If you are opting for the "Delete all existing files prior to publish" in the publish web dialog box, then make sure that the Visual Studio is started with Admin rights. Right click the Visual Studio and click Run as Administrator. Hope this helps.