worker

Home page of sample projects

Useful links

• Worker:
  • https://wakeupandcode.com/worker-service-in-net-core-3-1/
  • https://stackoverflow.com/questions/56941898/how-to-setup-event-log-for-net-core-3-0-worker-service
• Options and configuration:
  • https://stackoverflow.com/questions/58183920/how-to-setup-app-settings-in-a-net-core-3-worker-service#58184278
• Environment selection:
  • https://www.thecodebuzz.com/set-appsettings-json-dynamically-dev-and-release-environments-asp-net-core/
  • https://www.thecodebuzz.com/createdefaultbuilder-configuration-management-net-core-and-asp-net-core/
  • https://stackoverflow.com/questions/46364293/automatically-set-appsettings-json-for-dev-and-release-environments-in-asp-net-c
  • https://stackoverflow.com/questions/37322565/dotnet-run-or-dotnet-watch-with-development-environment-from-command-line/43992754#43992754
  • https://www.tektutorialshub.com/asp-net-core/aspnetcore_environment-variable-in-asp-net-core/
• User secret in console app:
  • https://medium.com/@granthair5/how-to-add-and-use-user-secrets-to-a-net-core-console-app-a0f169a8713f

Useful commands

Create the project

mkdir worker
dotnet new sln
dotnet new worker -o Worker
dotnet sln add reference .\Worker\

dotnet add package Microsoft.Extensions.Hosting.WindowsServices
dotnet add package Microsoft.Extensions.Logging
dotnet add package Microsoft.Extensions.Logging.EventLog
dotnet add package Microsoft.Extensions.Configuration.UserSecrets #needed if using user secrets on console

Test the worker

Open Terminal and launch the worker (see profiles in launchSettings.json):

clear; dotnet run --project Worker --launch-profile Worker-Dev
clear; dotnet run --project Worker --launch-profile Worker-Prod

Manage the window service (using PS ISE)

Note: need to run Powershell ISE as administrator to use sc commands.

sc create ".Net Test Worker" binpath=C:\<path to project>\samples\worker\Worker\bin\Debug\net5.0\publish\Worker.exe
sc start
sc delete
sc stop

Do not forget to publish the project before:

dotnet publish ...

Add user secret on console application

By default the path of user secrets is C:\\Users\\<user>\\AppData\\Roaming\\Microsoft\\UserSecrets\\<secretID>\\secrets.json. By launching the command dotnet user-secrets list, we can have the list of current secrets

Sample of secrets.json file:

{
  "FirstBackgroundService": {
    "IsEnable": false,
    "DelayInSeconds": 3
  },
  "SecondBackgroundService": {
    "IsEnable": false,
    "DelayInSeconds": 2
  }
}

Has one AppSttings by environment

There are several files to modify to get appsettings.Developpement.json working

• launch.json (used by Visual Code Debug)
• launchSettings.json (used by Visual Studio Debug and commmand line like dotnet run --project Worker --launch-profile Worker-Dev)
• appsettings(.Developpement).json
• Program.cs (to add the logic getting the right appsettings file)

Todo

• specific folder in Event Viewer
• unit tests