I am new to mobile application developing. When I was creating a new .xaml file in new solution in the Xamarin Studio.
It gave the error:
"the target "UpdateDesignTimeXaml" does not exit".
How can I resolve this problem?
Build errors can occur if you have updated the Xamarin.Forms nuget to a newer version that requires UpdateDesignTimeXaml.
Close and reopen Xamarin Studio.
Clean all and ReBuild your project.
Ref: https://forums.xamarin.com/discussion/49152/problem-initializecomponent-and-pcl
A workaround for this is to remove the MSBuild:UpdateDesignTimeXaml from the Custom Tool of the xaml file properties in VS. Save, add MSBuild:UpdateDesignTimeXaml again and save again will force MSBuild to recreate the *g.cs file.
I had this with Visual Studio for Mac.
I fixed it by:
closing VS
manually deleting the packages, bin and obj folders
restart the project in VS
restore NuGet packages, build and run.
Got same issue in Visual Studio for Mac. Worked find with
closing VS
manually deleting the packages, bin and obj folders in both android folder and main folder
restart the project in VS
restore NuGet packages, build and run.
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...
Whenever I try to build and run my mobile project the error
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(1166,2):
error MSB4057: The target "_AndroidXJetifyEmbeddedFiles" does not
exist in the project.
Even when I create a new xamarin project and run it with the default code, I get the same error. Visual Studios is up to date so I am not sure what the problem could be.
I solved this issue by posting on Xamarin-Android's GitHub issue tracker See here...
You should try to delete %userprofile%\.nuget\packages\xamarin.androidx.migration and to compile you app again. It worked fine for me.
You can try the following methods:
1.update your nuget to the latest version and then delete bin and obj folders and try again;
2.Check if you have set up the Android SDK for Xamarin.Android correctly.
Check document: https://learn.microsoft.com/en-us/xamarin/android/get-started/installation/android-sdk?tabs=windows
3.If the problem persists,try to repair your visual studio;
For more details, please check:https://learn.microsoft.com/en-us/visualstudio/install/repair-visual-studio?view=vs-2019;
4.If the problem persists，you can try to perform a thorough uninstall for Xamarin for Visual Studio, and install the latest Visual Studio;
Today when i update a old project to Xamarin.Form5, i get this bug. I try to update all nuget, but still show this bug, when i see Warning, i see have a nuget downgrade because two nuget reference conflict. I delete one nuget that i not use, Build success.
I'm using visual studio 2017, xamarin v2.5.1, I created a new xamarin forms project but I got this problem after build android project
The target "CssG" does not exist in the project.
what does this mean ?
after 3 days searching for the solution, I can't find it, any suggestions please ?
Closing Visual Studio and manually deleting the obj and bin folders worked for me! (my go-to move by the way)
I finally succeeded in solving this problem.
After building a NEW project using the Mobile App (Xamarin Forms) template, I first downgraded Xamarin.Forms to v2.5.0.280555 in all projects using Manage Nuget Packages on the references. Then I unloaded the Android project and opened the Android.csproj. In the Android.csproj I downgraded the Xamarin.Android.Support resources to 25.4.0.2, saved the document and Reloaded the Android project. After cleaning the solotion, closing it, deleting the (Android) obj and bin files and reopening the solution I could run it without errors.
I'd like to stop this error appearing in the Intellisense section in the Output window in Visual Studio:
[Failure] Could not find file 'C:\code\CatApp\obj\x86\Debug\App.g.i.cs'.
I've cleared obj and bin folders, upgraded to the latest version of Visual Studio 2017,cleared all nuget packages and checked my project out from SVN again.
I get the same problem if I create a new UWP project. (Every time I create a new UWP project, I have to get the Nuget package Microsoft.NETCore.UniversalWindowsPlatform separately. I'm wondering if the two problems could be related.)
My target and min version are 16299.
I am trying to build a UWP project in Release. But i am not able to create the build and I am getting an error could not copy the file "C:\Users\kumara krishnan\.nuget\packages\System.Private.Uri\4.0.0\runtimes\win8-aot\lib\netcore50\System.Private.Uri.dll" because it was not found. Also I am able to build and deploy when i keep it in debug mode. How to fix this issue?
It seems there is something wrong with your .nuget environment. You can try following steps to fix it.
Firstly delete the whole System.Private.Uri folder under C:\Users\kumara krishnan\.nuget\packages\.
Then in Visual Studio, open the Visual Studio Options dialog, click on the "NuGet Package Manager" node and make sure you have checked "Allow NuGet to download missing packages" and "Automatically check for missing package during build in Visual Studio".
After this, you can just rebuild your project and Visual Studio will automatically restore the NuGet packages your project used and download whole "System.Private.Uri" files.
You can also create a blank app and create a new instance of Uri without adding other references manually to check your environment.