Creating an ASP.NET Core project - c#

I want to create an Asp.net Core project with Visual Studio 2017 Community but the Solutions explorer says that I have (0 projects).
I tried selecting an empty project, web application, web application (Model-View-Controller) but the Solution explorer still displays (0 projects).
When I go-to Debug I see the "Attach to Process" option. There is no option to start of course since I have no projects.
What could be the issue?

Have you installed everything correctly? To verify this, open a normal cmd and just type 'dotnet'
Only if the command runs, printing out information about how to use dotnet, you're good to go.
Have you installed the correct .NET SDK? What version of it? Make sure the version is compatible with the version of visual studio you have installed.
Follow this link for step by step setup instructions:
https://www.c-sharpcorner.com/article/getting-started-with-net-core-on-visual-studio-2017/

This could be the same problem, but I had the same issue during College once but this time I had the support for the web components, so I went back to the installation and repaired it. It downloaded the missing files and it worked again and it took a while.
Let me know if that works or not.

Related

Visual Studio 2017 Issues

So, I feel like I don't have all of the Visual Studio components that I need on my personal computer. For example, when I create a new ASP.NET application on the school computer, it generates files with it (program.cs, startup.cs, and appsettings.json), but those don't exist when I try to create a project on my laptop.
I just had a huge issue trying to get Scaffold-DbContext to work (and after about an hour of digging, finally found the commands to run in Package Manager Console that would allow that much to work). I'm sure there are other things I'm completely missing and don't realize it yet.
What do I need to do to get these files to be generated when I create a new project? Are there other things that I haven't installed for Visual Studio yet that I probably should? I'm really at a complete loss here.
Bring up Visual Studio. Click on Tools. Click Get Tools and Features...
Compare whats installed with what you have at school.
These three will do most of what your looking for:
.Net desktop development
ASP.NET and web development
Data storage and processing
Also look at the versions Help About Microsoft Visual Studio

UWP Unable to activate windows store app error: the app didn't start

I am asking this question - and I know that there are multiple ones here in StackOverflow and other sites - because I have tried everything out there but no solution.
My problem is that this error that appears whenever I try to start the UWP app:
I tried switching between platforms (x64 and x86)
I tried to clean the solution and rebuild
I made sure that the project was on the C drive
I'm using Visual Studio 2017.
I've had this problem for a while. People suggest a lot of random workarounds (clean the project, move the project folder, repair/reinstall Visual Studio, delete configuration files, and so on).
This is the most sensible solution I've found, and the one that worked for me.
Basically, just open the Project properties, Build tab and make sure the option "Compile with .NET Native tool chain" is checked.

Missing Visual Studio Web Application publish targets

I am missing the usual publish targets when publishing my c# web application. The usual "Import" and "Custom" options are missing when I go to publish, as well as the "Manage Profiles" drop down that has the option to create a new profile.
Here is the screen I am presented with.
The buttons on the left hand side are "greyed out"
Here is another screen from a colleague that has the missing options
I have tried a full reinstall of Visual Studio 2015 update 1 with no success. I have also tried creating a fresh ASP.NET Web application project in a new solution resulting with the same problem.
In the end this ended up being a corrupt publish profile file in the Properties/PublishProfiles/xxxx.pubxml within the project.
There are multipy options for this behavior:
Issue with the Web Deploy Tool
Try to reinstall the current Web Deploy 3.5 Tool
Depending on the exact Version of your Visual Studio and your Operating System
There are known issues about specific OS/Visual Studio combinations.
Missing Web Developer Tools at Installation
Select the Web Developer Tools Option at installation

Intellisense not automatically working VSCode

I just downloaded Visual Studio Code and my Intellisense is not automatically working.
The two settings that control this seem to be set correctly:
"editor.quickSuggestions": true,
"editor.suggestOnTriggerCharacters": true,
I do get an Intellisense menu when i start typing and press "CTRL + Space", but this gives me a list of everything and not things specifically for my object.
What am i doing wrong?
If you have a workspace and for some reason have multiple folders you may need to 'help' omnisharp a bit. I initially had a big project and added a solution for it further on - ending up with TWO workspace folders (one to a startup project and one to the solution). After composing that setup I experienced only the first project to have intellisense working.
Solution to get intellisense working was to make sure omnisharp worked its way from the solution instead of the project:
Ctrl + Shift + p
Write "OmniSharp: Select Project" and press Enter.
Choose the solution workspace entry.
Inspiration gotten from 'swaner':
https://github.com/OmniSharp/omnisharp-vscode/issues/1889
Visual Studio Code's more advanced editing features (IntelliSense, refactoring tools, etc.) only work in C# files if you have a project.json file or *.sln file that VSCode is aware of. Open the folder (i.e. open the File menu and click Open Folder...) with the *.sln file or project.json and VSCode will attempt to find all project/solution files in the folder. If there are multiple projects, you may need to select one from the projects button on the right side of the status bar (bottom of the window).
From the VSCode website:
Selecting a project.json-file is opening a DNX-project and VSCode will load that project plus the referenced projects
Selecting a *.sln-file is opening a MSBuild-project. It will load the referenced *.csproj-projects and sibling or descendant project.json-files but no other project files that are referenced from the solution file.
Selecting a folder will make VSCode scan for *.sln and project.json files and VSCode will attempt to load them all.
If you are start your project with c#, then some time you haven't download extension.
Process by written
Ctrl + Shift + p.
Write "OmniSharp: Select Project" and press Enter.
Choose the solution workspace entry.
Then enable the c# extension for "OmniSharp : Project".
Process by image
Downgrading to 1.23.9 of the C# VS Code extension fixed the intellisense for me. So if nothing else is working for you, perhaps try installing an older version of the extension (doesn't necessarily have to be that exact one I mentioned). You can do this by selecting this option in VS Code:
As of the 0.5 version I have found that I need to close and re-open my working files to get some new intellisense information to start working for my own files. This usually happens after I have a file open that needs to use type information from another file I just created. Until I close and re-open them (within the editor) the intellisense doesn't always work.
Hopefully this is something that'll get fixed as the app matures.
Inorder to make the intelligence working, the Visual Studio Code extension OmniSharp should be there along with Mono. When you open a project/solution folder, the OmniSharp gets the project dependencies from either project.json or from the dotnet solution file (if the project/solution created with other versions of visual studio).
So, when you look at the omnisharp's output window after immediately opening the project/ solution folder, you may see the following lines
Starting OmniSharp server at 2017-9-18 09:26:44
Target: /Users/{username}/Source/{Your Solution Folder}/{Your Solution
file}.sln
OmniSharp server started wth Mono
Path: /Users/{username}/.vscode/extensions/ms-vscode.csharp-1.12.1/.omnisharp/run
PID: 5808
post that, you may see couple of lines coming up like below,
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
Update project: {Your Project1 Name}
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
Update project: {Your Project2 Name}
....
they mean that your projects are getting recognised by OmniSharp Extension.
If you get any error message informing you about timeout, please get into the settings of the Visual Studio Code, and add a configuration override like the one below:
"omnisharp.projectLoadTimeout": 200
I know it is too long to wait for 200 seconds. But don't worry, this won't stop you anymore working with project files. But, remember that the IntelliSense will be automatically available once all the projects in the folder are successfully loaded.
Feel free to extend the Timeout setting since it will help you getting intellisense even-though you are not getting it immediately.
Here is another link with the same solution: https://github.com/OmniSharp/omnisharp-vscode/issues/1585
Hope my information helps you! Enjoy your VSCode!
This case was for an existing project that was working fine before. Opened via the vs code "recent" history.
For dotnet core. I opened my project's *.csprog file, made no changes, and saved it via the vs code editor.
As soon as I saved, all of the intellisense stuff starting working again in my other files within that project.
Another troubleshooting strategy to try if none of the above works out is uninstalling Mono, which is unnecessary anyways if you're using .NET Core. I also experienced a sudden disappearance of Intellisense after pulling changes to one of our enterprise repos that included an upgrade from ASP.NET Core 2.0 to 2.1. Strangely, at the same time, Intellisense was working fine in another C# project repo running ASP.NET Core 2.2.
For the project in question, I was puzzled to see successful logs for each reboot of the Omnisharp server as well as perfectly clean builds and runs. The puzzlement increased as I compared these Omnisharp logs to those from the 2.2 project and found them effectively identical.
Upon uninstalling Mono, the one detail that changed is how Omnisharp started. Now it boots up from a shell script located at ~/.vscode/extensions/ms-vscode.csharp-1.19.0/.omnisharp/1.32.18/run. Previously, Mono itself was booting the server from the executable at ~/.vscode/extensions/ms-vscode.csharp-1.19.0/.omnisharp/1.32.18/omnisharp/Omnisharp.exe.
Other troubleshooting I attempted in this instance though to no avail:
dotnet clean / Deleting bin and obj directories
Updating launch.json to point at the proper /bin/Debug/netcoreapp2.1 build
directory
Wiping my local nuget cache
Restarting Omnisharp
Uninstalling and reinstalling VS Code, as well as bumping back a version from 1.33.1 as the breakage coincided oddly with the March 2019 update
Uninstalling and reinstalling the C# VS Code extension, as well as bumping back a version from 1.19.0 given other users' reports of said version interfering with Intellisense for certain projects*
Adding a global.json file at project root to override default utilization of latest .NET Core SDK (mine was 2.2.105) and run instead using 2.1.302 in concert with the project's version
Wiping/rebuilding the project .sln file
Specs: VS Code 1.33.1, C# Extension 1.19.0, MacOS High Sierra 10.13.6.
*NB: As it turns out, in another .NET Core 2.1 project with the same issues in VS Code as described above, uninstalling Mono alone did not fix things. I also did wind up needing to bump back the C# extension to v. 1.18.0 to recover Intellisense. Weird.
The issue I had was OmniSharp was an older version. I set the flag to update to latest version in Settings.json file. This ensures the extension is always the latest version.
"omnisharp.path": "latest"
And restarted VS code. That fixed it for me.
Simply reinstall the extension and restart the VSCode/PC.
I use Task Manager and kill the Visual Studio Code process, then restart Visual Studio Code, the intellisense shows and fixed.
I've had some good experiences in C# with this extension so far:
https://marketplace.visualstudio.com/items?itemName=jchannon.csharpextensions
This extension traverses up the folder tree to find the project.json or *.csproj and uses that as the parent folder to determine namespaces.
Try "Install Extension" from command Pallete - probably if C# intellisense is not there:
https://code.visualstudio.com/docs/customization/colorizer
if intellisense in not working for react js or javascript or node js this solution will help for windows
uninistall type script by typing npm uninstall -g typescript
install specific version of type script that is 3.3 by typing npm install -g typescript#3.3
add the typescript location in vscode by navigating to file > Preferences > settings > here search for edit in setting.json then add this path "typescript.tsdk": "/Users/yourusename/AppData/Roaming/npm/node_modules/typescript/lib"
settings.json should look someting like this
{
"editor.suggestSelection": "first",
"vsintellicode.modify.editor.suggestSelection":"automaticallyOverrodeDefaultValue",
"typescript.tsdk": "/Users/yourusername/AppData/Roaming/npm/node_modules/typescript/lib"
}
I was able to fix this by changing the Api Compatibility Level from .Net Standard 2.0 to .NT 4.x. You can find this setting on Project Settings / Player.
After that, intellisense started working again.
This is because of C# extension issue.
Reinstall the extension will work.
https://code.visualstudio.com/docs/editor/intellisense
https://marketplace.visualstudio.com/items?itemName=ms-dotnettools.csharp
I fixed this with a multiple project solution in .net5 / .net core 3.1 by
opening each project (not the sln folder) in VSCODE. This then prompts to add the resources/ .CSX? files to the project; enabling intellisense, per project. Finally close that window and reopen the solution folder and all works as expected.
See image
Add VSCode assets
Downgrading to 1.23.9 of C# for Visual Studio Code (powered by OmniSharp).
https://i.stack.imgur.com/VrdJl.png
After trying several things I looked at the OmniSharp logs only to realize that because I had two different sln files in my workspace. It had picked up the “other” one and thus wasn’t working. I deleted it, reopened vs code, and all is well again.
For me I had been working without internet for a long time. It had previously been working but then stopped. I closed+reopened VSCode with a stable wifi connection and the Output tab in VSCode popped up, displaying the the extensions were re-installing. After that it worked!
in my case , the extension wasn't enabled
I just had this happen (this being no code completion suggestions appearing). What resolved it for me was changing the VSCode Editor package in Unity to a previous version and then back to the current version.
For me, this was going from 1.2.0 to 1.1.3 and then back to 1.2.0. I believe removing and reinstalling 1.2.0 would have accomplished the same.
Window > Package Manager > Visual Studio Code Editor
I know this is probably the most obvious answer. But I had enough dealing with VS Code ridiculous bugs. You should be focusing on code, not the buggy IDE. Their documentation doesn't make it easy either to debug.
Steps for complete uninstallation:
Save your personalization files such as keybindings.json,
Just put it on GitHub or something so whenever you need have trouble with VS Code you simply just need to go to GitHub and copy-paste it.
Uninstall VS Code completely
When you uninstalled VS Code, it doesn't erase your extension files and some old settings. This is the cause of the re-installation ended up the same. Horrible move VS Code. For the list of the files that you must delete, you can check out this answer.
Go to their website and install the new one.
I hope this helps some people who are already had enough with the VS Code ridiculous bug.
In my case, the issue was not with VS Code settings. The error was due to a corrupted TEMP path configured in my PC's registry user profile environment settings.
I got this error from Help --> Toggle Developer Tools --> Console
The error was flagged in the console when I opened a new typescript file.
Unable to write file c:\Users\XXX\AppData\Local\Temp;C:\wamp64\bin\php\php5.6.25;C:\vufind-3.1.2\install.php\09cf49d8-af5b-42e9-8194-43f5b566be0f'
Obviously this path was corrupted. After updating the environment variables in registry settings, the VS code IntelliSense started working. Checking the console is a good start to find the root cause of this issue.
Earlier intellisense was working for Angular in VS-Code but for some reason (which I don't know) intellisense stopped working. I had extensions installed i.e. Angular Essentials and Angular Language Service etc. that were responsible for this intellisense and all that.
What I did?
I disabled the extensions, restarted VS Code and enabled them. It was all working fine as before.
If everything in VSCode is working ( No errors in output console, language server is working etc.) and built-in extensions are enabled. Still, if your IntelliSense is not working for normal .js files make sure variables are defined with a type identifier such as var d = new Date() or let d = new Date(). In my case, IntelliSense was not working for d = new Date() (No autocomplete for Date object 'd' APIs in this way) but started working fine when I specified a type before my variable names.
Download and install "Tool for Visual Studio 2019" as the C# extension under hood use the build tools: https://visualstudio.microsoft.com/downloads/
In my case, I had an extension installed (Explorer Exclude) to help me focus and hide certain files that I don't regularly work with within the Explorer.
I so happened to have disabled viewing *.sln, *.csproj and *.vsconfig files and folders, which apparently prevents VSCode from even knowing the file is there in the first place. Disabling these specific rules solved the problem instantly.
Took me ages to figure out... The more you know.
I solved it by uninstalling all SDK's (not sure if this is needed)
and installed 4.7.1 developer pack
win 10, vscode 1.63.2, unity 2020.3.25f1
I fixed this by installing .NET Framework 4.7.1 Developer Pack:
https://dotnet.microsoft.com/en-us/download/dotnet-framework/net471

Visual Studio ASP.NET Template Incomplete (MVC)

I got really weird problem. I am starting to learn MVC but my ASP.NET template seems to be incomplete and does not support MVC at all. It doesn't matter which version of .NET Framework I choose. Look:
What is more weird, my ASP.NET MVC 4 Template from previous version of visual studio works fine, without any issues (I can add views, controllers etc). BUT ONLY if I choose .NET Framework lower than 4.5.2.
What I already did:
I tried command: devenv /installvstemplates
I did repair installation of visual studio and its updates
I uninstalled all addons and extensions
What I do not want to do:
I dont want to clean reinstall Visual Studio
What I think I can do to fix this:
copy cache from someone and paste it to my \Common7\IDE, but I do not
have access to working cache files.
I would really appreciate your help guys.
/edit (I am sorry for my mistake with adding answer)
So I tried to fix it as i didn't receive any answer, I tried many things from google results, many pointing to this site but nothing worked.
I uninstalled visual studio, cleaned registry, used /uninstall /force with 2012, 2013 and all updates isos with no luck.
I tried this solution:
Can't create new MVC5 project or any other ASP .NET projects in Visual Studio 2013
but it didn't work either.
Does anyone has any idea? I will give you some reward if your answer help me.
I would really appreciate anything. Point me to some direction.
ONLY MVC 5 doesn't work, no templates are shown (in one asp.net
template) and if I download mvc 5 template from the web, or convert
my existing mvc 4 project to mvc 5 it stops showing "add controller,
add view options"
All MVC 4 projects and templates are working without any issues at all.
/edit 2
=== WORKAROUND ===
If someone tries to resolve this issue, basically I coudn't do it, but I found workaround which is ugly and simple:
Deleted every single extension AND every VS Update
Uninstalled Visual Studio
Uninstalled it again using /force method
Cleared its every trace and the registry traces I was able to found
Used TuneUp utilities to clear broken registry keys
Uninstalled SQL Server 2014
Uninstalled everything that was related to Visual Studio (Web Essentials, .Net Frameworks, Command Tools etc), check in Ccleaner,
it will be much faster.
Installed Visual Studio with Update 3 and... It was broken right after installation, missing files errors
I repaired the installation and everything seemed to work but... localization, language files didn't work, caused visual
studio to
show errors or simply hang.
I tried to reinstall language pack but I received error "this language is already installed". I couldn't uninstall it
either. I finally added language files manually:
in VS folder in Program Files searched for '1033' and 'en' folders
opened my acronis partition backup
added to every directory where one of the two folders was found, folder equivalents of my language '10xx' or 'xx'
WARNING: If you won't do it for EVERY folder, you will get assembly missing error, or your visual studio will have spikes (especially in .aspx files). Don't copy paste it all at once either cuz if you place localization files for assemblies, extensions you don't have, it will cause errors too.
TIP: If you don't have backup, simply take this files from someone else, they should generally work, no matter which update VS of the other person have.
Its unfortunate that no one had better answer for me but I do hope that this will at least help guys in similar situation.

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