I recently upgraded Xamarin Studio to the latest version, and now I am unable to load my solution!
Upon opening the solution, the below error is displayed:
I have looked into the logs, and I see the following:
System.InvalidOperationException: Already bound to project
Has anyone seen a similar error, or does anyone have a solution?
Thanks!
This error appear to be associated with the following Xamarin bug report:
https://bugzilla.xamarin.com/show_bug.cgi?id=41565
If you are able to try the following workaround, it should allow you to open the project.
Back up the solution
Open each .csproj file associated with an extension (such as WatchKit or Today)
Find the section "ProjectTypeGuids"
Remove the key "FEACFBD2-3405-455C-9665-78FE426C6842"
Save the file
Attempt to open solution
This should solve it for iOS
This also appears to impact Android projects which contain bindings. For example:
Given a test project (Test.csproj) with two ProjectTypesGUID: {EFBA0AD7-5A72-4C68-AF49-83D382785DCF} and {10368E6C-D01B-4462-8E8B-01FC667A7035} the project will fail to load. This is because the first ID corresponds to a regular Android project. The second one is for an Android Binding library project. The problem can be solved by removing the {EFBA0AD7-5A72-4C68-AF49-83D382785DCF} GUID from the .csproj
Fixing the issue for Android is similar to above. If the project contains both ProjectTypesGUID: {EFBA0AD7-5A72-4C68-AF49-83D382785DCF} and {10368E6C-D01B-4462-8E8B-01FC667A7035} then do the steps below
Back the solution up
Open the .csproj file
Find the section "ProjectTypeGuids"
Remove the key "EFBA0AD7-5A72-4C68-AF49-83D382785DCF"
Save the file
Attempt to open solution
Thanks!
Hope it helps :)
My xamarin project was made at windows, I copy to Mac. But Couldn't open same error. I solute with doing this. Open solution from windows visual studio. and right click solution then open xxmanager(i don't know english menu name, short cut maybe "o") and check build IOS. and copy to all solutions and project files to MAC. Then retry open solution. good luck
I have been experiencing this issue for hours. It started suddenly when Xamarin.iOS was giving issues due to lack of reference.
I tried the solutions here including removing the guid in Project Build but nothing worked.
To fix this, I realized that Visual Studio for Mac had downloaded an update which I installed and restarted immediately. I then noticed that Visual Studio Xamarin Form iOS component is missing at it states the presence of an update to 12.xxx.
I simply re-downloaded the iOS components (about 550Mb) and I am hoping everything would work fine.
Related
I have a .NET MAUI project that was created with VS2022 Preview 2, and it builds without errors or warnings and works as expected in the debugger. Prior to updating Visual Studio to Version 17.4.0 Preview 4.0 I was able to publish the project as a sideloadable MSIX from within VS.
Since updating, I get the following error when I click Create in the Create App Packages wizard:
MSB4057 The target "_GenerateAppxPackage" does not exist in the project.
The error is listed against the MAUI project's .csproj file.
I've tried creating a separate new, default MAUI project in the new preview - this publishes ok and (as far as I can see) doesn't contain _GenerateAppxPackage anywhere within its files or project structure. So for now I'm assuming this isn't something new that was added with the preview.
I found some references to _GenerateAppxPackage on the web but they appear to refer to Azure integration. My project is a stand-alone data transformation app that doesn't even access the net.
I'm at a loss what to try next. I don't know what this target refers to, where it should "exist" within the project, or what it does. Can anyone help me understand the problem and/or point me to a solution?
Update: 2022-10-28:
I tried deleting the project structure and creating it from scratch with File -> New Project, then adding back only the .cs and .xaml files. Publishing the recreated project gives me the same error.
I also tried uninstalling the VS preview and re-downloading and installing it. Again, publishing the project gives me the same error.
I still have no idea what is causing this, or even where to start looking.
I faced with the same problem at Visual Studio 2022 17.4.0 (net6.0-windows10.0.19041.0).
The simplest solution for me was be using the command dotnet publish directly.
At root of project just write in terminal:
dotnet publish -f net6.0-windows10.0.19041.0 -c /p:RuntimeIdentifierOverride=win10-x64
I learned today that MAUI is now in the mainline Visual Studio 2022 edition, I've tried using that instead of the preview, and I can confirm that the problem goes away. I wish I'd known about this earlier...
I was working fine with in my project ,the once I updated my Xamrain.Forms to 3.0, all of a sudden I got this error :
Has anyone come across this issue? I'm kinda lost here, thanks .
Issue with my project was that, Project.Android and Project.iOS's Nu Get packages Xamarin.Forms's versions were different, so I had to update all Xamarin.Forms library in each project to the same version.
Clean, Build and it solved the issue.
Please ensure that all projects reference the same version of
Xamarin.Forms
So make sure that the statement above is correct, clean your solution and just in case restart the Visual Studio after that.
EDIT:
It seems to be a quite popular issue after upgrading to Xamarin Forms 3.0, if the steps above didn't resolve it please consider:
Delete all /bin, /obj and /packages folders within the solution
Check csproj files for duplicated Xamarin Forms references
Re-add Xamarin Forms NuGet packages
this should help:
You need to click RMB on each (Droid, IOS, UWP)-project -> Nuget -> and then update Xamarin Forms for every project to the same version, even "solution".
I would not call it a solution, but uninstalling the app from the device prior to every build was the only way forward I have found.
I tried all of the above to no avail.
What helped me was the following:
Close Visual Studio (for mac in my case)
nuget locals all -list
Delete all nuget cache folders
Restart visual studio and try again.
When I try to create a new Windows Forms project, I get the " ....csproj cannot be opened because its project type (.csproj) is not supported by this version of the application" error. The .csproj file it is referring to is in AppData\Local\temp\randomname\Applicationname.csproj but that file does not actually get created.
I know that when this error crops up with opening projects created in previous versions, it's usually a missing library that is used by that particular project but for the life of me, I cannot figure out what library I could be missing here as it is a new project.
I have VS 2013 Ultimate installed with all components.
Running on Windows 8.1.
First confirm it is not a add-on or a problem with Visual Studio itself.
Try and start Visual Studio from the command line with devenv.exe /resetskippkgs and also try disable any IDE extensions temporarily to see if one of them might be stepping on something. Do these two things first to see if the problem lies with VS IDE. Of course try creating a project after you have done these two things and see if you get the same results.
I never figured out what the actual problem was but I've installed Update 5 which was only released less than two weeks ago and it's working fine now.
I have a simple ASP.Net MVC project which for some reason has issues with intellisense. It is constantly giving me errors that namespaces local to the project can not be found, even though they do exist and the project will build fine. Here's an example:
It is very frustrating as this results in me having no intellisense available whatsoever. Has any one encountered a problem like this before, and do they know of a solution?
The project itself is an MVC4 website running in VS2013 in W8 under Paralells on a Macbook Air, should that have any effect on the problem.
As stated, I have no error messages to provide as the project builds and runs successfully, but please let me know if more details are required.
I had the same issue. Try removing your project from the solution and then add it again. It worked for me. Looks like a solution file quirk.
UPDATE: this is not a permanent fix as closing and reopening visual studio brings back the issue.
UPDATE 2: while looking to fix another issue where I couldn't change the default namespace of a project (I would get a System.Runtime.InteropServices.ExternalException), I found out that it was related to Xamarin tools for Visual Studio. I proceeded to completely uninstall Xamarin. It fixed my namespace renaming issue as well as the weird type or namespace not found / intellisense issue.
I had this same issue, seems to be something with the solution file and building the project as I could replicate the problem by simply creating a new project building then restarting visual studio.
Anyway I get around it at the moment by deleting the solution file and opening the project using the project file.
For anyone reading this in 2020, a fix that I've found that has worked for me is:
cleaning the solution and unloading the projects that have dependencies such as a web API depending on a data project and an application project (right click on the project in solution explorer and find "Unload Project"),
then reloading and building each project in the order of dependence such that they build successfully (right click on the unloaded project in solution explorer and find "Reload Project").
so in my case my data project does not depend on any other project so I reloaded and built that first, then the application project which depends on the data project and finally the web API project which depended on both data and application.
I am using Visual Studio 2010.
I wanted to study some code that dumps relevant data in a database, find out how it works and adapt it to my own version.
I only got as far as loading the solution in VS 2010, hitting the "Start Debugging" button, and then I got this error:
The working directory does not exist:
'D:\Dev\CodeProject\articles\smartcardfmwk\Smartcard_Framework
How can I fix this error?
The source code in question is Smart Card Framework, from Code Project
I downloaded the "Updated Project (VS2010)" and I can open it in VS2010, as well as build, but debugging just wouldn't work.
I did not try replicating the path yet, but as this is a working project, my company requires that it is placed on a very specific location accessible by others.
Nevermind, I got it. It was so simple, I'm sorry for wasting anyone's time.
The source Solution had a lot of Projects under them. I figured at least one of them was pointing to a directory that doesn't exist, so I waded through the Projects,
I right-clicked a Project and clicked the Properties
This will open up the ProjectName Property Tab
Under the Debug tab, there is a filed called "Working Directory"; I changed it to where the project is currently located.
This solved my problem, for now, unless there's a Project I missed. I am wondering, though, if I have to do this again if I move the Solution elsewhere.
This happened also in VS 2019 after importing / upgrading an old C# project. I was not able to see any project properties to change.
Finally it was fixed by manually editing the file <ProjName>.user.csproj as follows:
Replace
<StartWorkingDirectory>[wrong directory name]</StartWorkingDirectory>
with
<StartWorkingDirectory>.\</StartWorkingDirectory>
I also faced this problem that working directory does not exist, but I managed to solve it. There are certain steps to follow properly Whenever this error occurs.
In VS, open the "Project" at Toolbar.
Then go for Project properties.
Select Debug And check your working directory. If the path is wrong just browse it...