azure devops build and deploy to app service - azure

Question

I have create an empty project on dev.azure.com
I have cloned the repository on my local computer.
I have run this command in the main folder:
$ dotnet new mvc
I have create this azure-pipelines.yml file:
trigger:
- master
pool:
vmImage: 'windows-latest'
steps:
- task: DotNetCoreCLI#2
inputs:
command: 'restore'
feedsToUse: 'select'
- task: DotNetCoreCLI#2
inputs:
command: 'build'
- task: DotNetCoreCLI#2
inputs:
command: 'publish'
publishWebProjects: true
- task: PublishBuildArtifacts#1
inputs:
PathtoPublish: '$(Build.ArtifactStagingDirectory)'
ArtifactName: 'artifact2'
I have add, commit and pushed files on dev.azure.com (on master branch)
I have this warning message:
##[warning]Directory 'd:\a\1\a' is empty. Nothing will be added to build artifact 'artifact2'.
I have create a release pipeline but i get an error:
##[error]Error: No package found with specified pattern: D:\a\r1\a\**\*.zip<br/>Check if the package mentioned in the task is published as an artifact in the build or a previous stage and downloaded in the current job.
I do not understand what is wrong in my azure-pipelines.yml for artifact production...
Thanks

Answer 1

It seems that there is an issue where the published dlls are placed. Try the yaml below, that I have explicitly set the output directory for the published dlls and zipped the files after publish(that would probably be your next issue). I have also explicitly set in which folder to look for the published folder in order to publish the artifact.
trigger:
- master
pool:
vmImage: 'windows-latest'
steps:
- task: DotNetCoreCLI#2
inputs:
command: 'restore'
feedsToUse: 'select'
- task: DotNetCoreCLI#2
inputs:
command: 'build'
- task: DotNetCoreCLI#2
inputs:
command: 'publish'
publishWebProjects: true
modifyOutputPath: true
arguments: '--configuration $(BuildConfiguration) --output "$(build.artifactstagingdirectory)"'
zipAfterPublish: true
- task: PublishBuildArtifacts#1
inputs:
PathtoPublish: '$(Build.ArtifactStagingDirectory)'
ArtifactName: 'artifact2'