I am using Xamarin in Visual Studio. When I click on Design to preview my form, all I see is MockView on an orange background. I have tried to find a solution but nothing has made any difference. I tried Clean Solution then Build Solution. I have the latest version of Java. I downloaded HotReload and enabled it but it's the same. I have it in Debug mode. I have the latest version of Visual Studio. Is there anything else I can try?
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I am trying to open a C# solution that has been generated from a Unity v2020.3.19f project with Visual Studio 2022. Opening it with Visual Studio 2019 works just fine, but there are reasons I'd like to be able to open it with v2022 (such as GitHub Copilot). I did not have issues with this on my previous install of Windows 10.
Upon opening the solution in VS2022, I get the following pop-up prompt for every project in the solution:
Choosing the first option updates the target project to .NET Framework 4.8 and loads the project, but the whole file appears with red lines. When hovering over an underlined bool Property, the error shows as: `CS0518: Predefined type 'System.Boolean' is not defined or imported.
Choosing the second option opens this URL in my browser, prompting me to install .NET Framework 4.7.1 targeting pack (which was already installed via the Visual Studio Installer). When I try to install the .NET Framework 4.7.1 runtime, the installer responds with .NET Framework 4.7.1 or a later update is already installed on this computer. When I try to install the .NET Framework 4.7.1 Developer Pack, the installer allows me to choose from "Repair", "Uninstall", or "Cancel". Repairing has no effect.
I installed both versions of Visual Studio (2019 & 2022) the usual way through the Visual Studio Installer, along with the "Game Development with Unity" workload, which tells me it's installed all dependencies just fine:
Here's what I've tried so far:
Uninstall & reinstall all versions of Visual Studio through the Visual Studio Installer
Uninstall & reinstall Unity, with the Visual Studio module installed through Unity Hub (which just opens the Visual Studio Installer for me to choose which version I want to install)
Regenerate project files through the Unity Editor
Uninstall any references to .NET Framework through the Control Panel
Try reinstalling .NET Framework targeting pack 4.7.1 either from the Visual Studio Installer or manually through the Microsoft SDK website from the prompt
Nothing works for me. Any help on how to make VS2022 stop complaining is greatly appreciated.
Update 1: I found a couple of threads where people suggested simply pressing the Regenerate project files button in "Edit -> Preferences -> External Tools`. This has not helped me.
Update 2: I've tried everything I can possibly imagine, in different orders and different combinations. I even reinstalled Windows 10 to no avail. It's like Visual Studio just doesn't want to accept that the .NET Framework 4.7.1 targeting pack is installed. Please help :(
check this
https://learn.microsoft.com/en-us/answers/questions/733018/visual-studio-2022-cannot-locate-installed-net-fra.html
If you modified the value of ProgramFilesDir(x86), just to modify it back to C:\ProgramFiles(x86) can solve the problem
That is a very interesting problem, my main solution for you to first try is to make sure you are even targeting the correct .net framework in UNITY before you even build the solution. You are using the .NET 4.x, you need to go into your configuration settings and player settings in unity and ensure its not on a different version, for me, unity still defaults to .net standard 2.0. Follow the steps located here. To do so.
Another solution is to see if that first option actually gives you errors that prevent you from using unity, because I know that Visual Studio Code has problems occasionally where it tells me im wrong, my program is wrong, every life choice I have made was poor and I am poor, yet in unity, there are no errors showing in the console and I can hit play no problem. In that case I just had to rebuild a few times and fiddle with vs code until omnisharp stopped yelling at me.
Apperently I have been in a similar situation as when you were getting the error "Predefined type 'System.Object' is not defined or imported" because looking into it, I already have clicked on some of the links, try this one if that error persists. If you cannot prevent the errors to begin with, I would recommend you trying to fix the upgraded version from option one as that is more than likely going to get you the closest to a solution.
I am currently working on a new unity project and to be honest i am new at this.
I need to use the InputSystem package but Visual studio does not recognize it.
This is the version of my VS. Microsoft Visual Studio Community 2019 Version 16.9.3 and the version of Unity is 2020.2.1
As you can see by the picture, my VS already knows that I am working in a Unity project.
So the first thing that I tried doing is to regenerate project files but it didnt work. I also selected my VS as my default external script editor.
This is my external tools.
I re-installed VS using unity hub but nothing happend.
Do you have any suggestions? I followed some tutorials I saw over the internet but I am still getting no positive results and to be honest, I am getting out of ideas.
Just tested out the package installation. I installed the package in a fresh, empty Unity project. Here are the steps that I went through which worked in my case:
Locate the Input System package in the Package Manager
Click install
A warning prompt will appear, click yes
Unity Editor should now get re-launched on it's own, wait for that to happen
If Visual Studio is open, close it
Open Visual studio - right click on the Assets folder and select Open C# project
UnityEngine.InputSystem namespace should now be available, if not, re-open Visual Studio one more time
Let me know if it works for you.
For me works when I install .NET and .NET Core and reboot the computer. (made this on Windows)
https://dotnet.microsoft.com/en-us/download
https://dotnet.microsoft.com/en-us/download/dotnet/3.1
When I launch UWP project, it crashes and I'm getting errors like these.
And this error occurs mostly when its on debugging mode.
Soo.. first idea for fixing this was upgrading/downgrading nuggets, but that didn't help me, also I have these nuggets included for UWP:
Microsoft.NETCore.UniversalWindowsPlatform
SQLite.Net-PCL
System.Data.SQLite
Xamarin.Forms
XLabs.Forms
etc other(that dosent matter on this exception)
I also looked other posts for solving this, like adding SQLite extension, but I didnt find the extension from Universal Windows->Extensions.
Im pretty stuck with this problem, I think its probably a problem with nuggets
You were fairly close. Go to Tools > Extensions and Updates. Click the Online tab in the left hand menu.
Search for SQLite and download SQLite for Universal Windows Platform.
Now go back to the Extensions window, as you showed above, and tick the SQLite for Universal Windows Platform. Ensure you keep the Visual C++ 2015 Runtime ticked, you need this as well.
I have downloaded VS For Mac Preview and created a new Xamarin Forms IOS/Android Solution using the portable library. When i try and load the XAML designer though to view the startup page I get the error "Invalid XAML : default constructor not found for Xamarin.Forms.Applicaton". I have not made any changes to the project code generated by VS For Mac and the only thing I did was to build the Android project as this is required before the designer can be opened. I also had to download the latest versions of the Android SDK via the SDK Manager.
Does anyone have any idea what is wrong
Thanks
Steve
Firstly, there are two preview modes, one for iOS and one for Android - if you can't see both tabs, drag the frame over a bit. I can't currently get the Android preview to work right even though it builds, but for iOS to work it looks like you simply need to update the Xamarin.Forms package. Go to the 'Project' menu and select 'Update NuGet Packages.' Then, restart Visual Studio for Mac and it should be working. It is very slow to load, however. I had to rebuild my project and select 'Update NuGet Packages' a second time before it actually showed up.
I'm still trying to figure out why Android preview does not work.
I have created a Cordova project in Visual Studio 2015. By using cordova --version on my project folder, I could see that I am using Cordova 4.2.0.
Next thing I wanted to do is installing Geolocation plugin. So I did this by editing `config.xml via VS UI. The problem is that, once I hit, "Add", VS hangs.
It stays in this condition forever.
Please note
I spotted other questions about people not being able to download the same plugin, but that was not VS hanging, it was VS reporting an error. The reported error should have been fixed.
FYI I installed VS2015 Enterprise (full installation).
It looks like it just takes a lot of time! I left Visual Studio in that state for 4 hours. And now I have the plug-in downloaded and everything is fine!
It is pretty strange though. My network was fine and up during all the time. However it might be some network issue concerning me. Unfortunately hard to say.
So basically the procedure is fine. If anybody else runs into this again, then i think Visual Studio is having troubles downloading these plug-ins.