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    Steen Rabol
    @rabol
    I have tried to look for tutorials or blog posts but have not been able to find any good starting point - I’m coming from a totally different world so this is a new chapter :)
    TeBeCo
    @tebeco
    the docs are the way to go in dotnet core world
    they are rejected by amazing team and community so you have concrete stuff to read learn apply
    that's not just the api doc you have both
    Steen Rabol
    @rabol
    can one start an external app in this service e.g. c:\myapp.exe ?
    TeBeCo
    @tebeco
    can you rephrase another way ?
    the sentences is confusing and there too many way to interpret it
    Filip Vukovinski
    @vukovinski
    hello @rabol
    Steen Rabol
    @rabol
    If i have .net core app running as a service,can one of the functions be to launch another app?
    Filip Vukovinski
    @vukovinski

    you can:

    dotnet new sln
    dotnet new worker -o src/project-name
    dotnet sln add src/project-name

    open in editor

    for startes

    Steen Rabol
    @rabol
    Yes that is to create the project
    Filip Vukovinski
    @vukovinski
    on .Net Core general system security is much improved
    so emiting code and saving to dll won't work, ever
    StartProcessInfo is a good entry point to validate your prototype
    Steen Rabol
    @rabol
    Okay thanks
    Filip Vukovinski
    @vukovinski
    probably by using the registry (if running on Windows) to discover other apps
    no problem
    Steen Rabol
    @rabol
    I know exactly which app i need to start
    Filip Vukovinski
    @vukovinski
    then you're all sorted. One more tip, to avoid some common production issues, beware that when run as a service the current directory of the app is C:\Windows\System32
    Steen Rabol
    @rabol
    I need a service that i can call from a remote web app, and then the service should start a specific app, then go into a “wait for messages on port xxx from the app” mode and then send each message back to the main web app
    Filip Vukovinski
    @vukovinski
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\my-service-name will tell you where the app is installed
    TeBeCo
    @tebeco
    i think since 3.0 the system32 issue is fixed
    that's was an issue before
    Filip Vukovinski
    @vukovinski
    no, it's waiting 6.0
    Ivan Milosavljevic
    @Vertygo

    Is it possible to implement custom model validation that would return custom model state (or has anyone implemented such a thing)?
    In the current implementation, the validation error item contains only the field name and error message (or code if you want to put it in the error message).
    My requirement is to return the error code alongside field name and error message. I would like to use asp.net core pipeline and avoid situation where I'm calling some custom validator in the controller method that returns BadRequest with custom validation error object.

    Found two related and old issues on github
    dotnet/aspnetcore#6661
    dotnet/aspnetcore#4840

    Filip Vukovinski
    @vukovinski
    sure you can plug into the aspnet core pipeline with some class
    the complexity of your model validator depends on the complexity of your object model
    the pipeline ends if a piece of middleware writes to the body
    and you can pass state between different middleware
    i'm not sure if there is any specific aspnet core validation class or interface to implement
    Ivan Milosavljevic
    @Vertygo
    @vukovinski that is true but I would prefer to tap into existing Model Validation inside of aspnet core pipeline than having to write middleware
    Filip Vukovinski
    @vukovinski
    https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/mvc/models/validation.md
    https://gist.github.com/Ciantic/88a2e9bae6961c23c2f366e89526b853
    1 reply
    https://www.c-sharpcorner.com/article/custom-model-validation-in-asp-net-core-3-1/
    1 reply
    William Roseberry
    @RoseberryPi

    Haven't worked with Razor Pages apps before and I'm having trouble getting a form inside of a partial view to work. Submitting the form is not calling the OnPost method at all. Not sure what I'm doing wrong. Or how it's supposed to be done.

    Anyone have a link for creating forms specifically in a partial view?>

    William Roseberry
    @RoseberryPi
    Nevermind. I didn't realize that the partial view is not connected to its viewmodel but of the page's view model... Blazor has spoiled me much
    Alberto Passalacqua
    @AlbertoPa
    hint: View Components are also an option if applicable, and can doa bit more than partial views
    William Roseberry
    @RoseberryPi
    I'll have a look into those
    Alberto Passalacqua
    @AlbertoPa
    https://docs.microsoft.com/en-us/aspnet/core/mvc/views/view-components?view=aspnetcore-5.0
    sadly they didn't make them JS-friendly, and favored that mess of Blazor Server integrated in MVC
    Arnas Kučinskas
    @Arnas-Kucinskas
    Is it possible to execute JS in .cshtml @{} block?
    Or only after code block is executed you can execute js?
    TeBeCo
    @tebeco
    js is executed in the browser
    html rendering is done by the server
    you can put js code inside razor page/template etc...
    but it's not going to execute somewhere else than the user loading the page on it browser and the code being called
    Arnas Kučinskas
    @Arnas-Kucinskas
    With Blazor components (.razor) I can call JS before rendering occurs (at least visually) in OnInitialize method.
    Trying to find out if I can do something similar in cshml forms. For example call local storage and then adjust variables in C# code.
    Sorry for late response.
    @tebeco
    TeBeCo
    @tebeco
    ok was not sure if it was razor on server side or blazor my bad
    i was confused with the @{} i guess
    can't tell for blazor specific life cycle
    Arnas Kučinskas
    @Arnas-Kucinskas
    It is on server side. Blazor was just an example, on how it works there.
    So from this I gather that it is not going to happen on server side?
    duckblaster
    @duckblaster
    yes, all cs runs before any js in .cshtml
    William Roseberry
    @RoseberryPi
    Does Razor Pages' partial views have support for an equivalent to Blazor's renderfragments in child components?