• .Net,  Microsoft

    The world of Dotnet Templates

    I have long been using templates for dotnet new and of course Visual Studio. So I’ve started down the road of creating my own templates… or a least trying to understand how to create these,

    Now creating templates for dotnet new and especially for Visual Studio has never been a simple task. But let us try.

    The first matter is understanding where templates live. For the most part these are based on your user for your PC. This found by using a PS command:

    join-path -Path $env:USERPROFILE -ChildPath .templateengine

    This will return C:\Users\<your user name>\.templateengine   And as you guess it, there is a .templateengine directory in your users directory. What does that mean, well simply put, when one does a .dotnet new –install, application templates get installed for your user. These actually live in that directory space. Simple enough.

    When you start developing your own templates, you need to be careful, because the list of templates can get very long. That may or may not be a problem.
    A handy PS script to clear out installed templates and put it back to the original set of templates:

    function Reset-Templates{
        [cmdletbinding()]
        param(
            [string]$templateEngineUserDir = (join-path -Path $env:USERPROFILE -ChildPath .templateengine)
        )
        process{
            'resetting dotnet new templates. folder: "{0}"' -f $templateEngineUserDir | Write-host
            get-childitem -path $templateEngineUserDir -directory | Select-Object -ExpandProperty FullName | remove-item -recurse
            &dotnet new --debug:reinit
        }
    }

    Keep in mind, this clears out all templates you have installed under your user. Use with care. If you have a set of favorite templates… yeap, they will get cleared off too!

    Now, where to start? I would go to Sayed’s GitHub repo @

    It’s a long read, but one can also go over to Channel9 and look for the video series that steps one through the process.

    Another handy resource to search for templates is a web site:

     

    Enjoy
    ~ScottGeek

  • .Net

    The Confusing world of Text.Json and .Net 5

    So one of the base libraries over the years that has been our friend is Newtonsoft.Json – the stuff of legend maybe? Well, if not, certainly anyone whose done .Net and used any kind of Json formatted data certainly knows of Newtonsoft.Json… The “go to Json Serializer”! That is until Microsoft set out to prove to the world they could do it better. Better?

    Like many things in the world of .Net over the years, Microsoft watches these open source libraries… and notices when they become the defacto standard (meaning… Micro either left it out of their core offerings…. or more typical someone did better). Hence Microsoft’s System.Text.Json vs. NewtonSoft.Json.  Oh let the confusion begin!

    Now to Microsoft’s credit they have been working to finally bring System.Text.Json up to speed… but of course they continue to state the their intent is not to bring their Json library up to par with Newtonsoft. And there it is… the two world Json library view… now mostly the complaint I have deals with migrating old code up to using Microsoft’s. It’s a bit of a “rub me the wrong way” kind of careful reading as to which direction to take. Why? Well you get into dependency  issues where Newtonsoft and Microsoft’s library don’t always play well together- that can be a problem when it comes to wanting to use old code (NewtonSoft) in a new app while wanting to take advantage of faster MS .Net 5 serializations….. Yeah, why would one ever want to do that?

    Anyway, I take some time to read a great article @

    Layomi has a great write up of things to consider… especially in the section “Choosing between…” the two different libraries…. It’s a good read.

    ~SG

  • .Net,  .Net Core,  ASP.NET Core,  Microsoft,  Visual Studio 2019

    Dot Net 5 is Here… Check it out.

    Wow… some most excellent videos on what is what in .Net 5! Check it out on

    You can also find these on You Tube… search on .Net 5. The Conf 2020 Days 1-3 will be there…

    ~ScottGeek.

  • .Net,  .Net Core,  Microsoft,  Visual Studio 2019

    Dot Net Hell by any other name?

    Just when I think Dot Net Hell days are coming behind us… I run across the reality of the fact that those that created this in the first place are… well… still doing it?

     

    Take this little gem:

    public static async IAsyncEnumerable<string> GetContent(string[] urls)
    {
    
    }

    Yes, we now have IAsyncEnumerable… or do we.   In my little experiment, I have a .Net 4.8 console app with C#8.0 language stuff turned on. So, I wanted to mess about with the Async Enumerable…. But in my console app that IAsyncEnumerble goes all red line of crap on me.

    So what’s the deal?  Well it’s simple once you do the digging.   .Net 4.8 does not implement .Net Standard 2.1… Yeah, you guessed it… where the Async Enumerable lives!

    So yeah, I could use .Net Core 3.0 which works with C# 8.0 and .Net Standard 2.1. Or here’s a thought why not just do a .Net Standard 2.1 console app? Well, the latest version of VS 2019 does not have a .Net Standard 2.1 template listed… Ummm, I’m sensing something missing there.

    Welcome to the “New” Hell! 

    ~ScottGeek….

  • .Net,  Microsoft,  Visual Studio 2019

    Program Challenge using CSV and NetMQ Part 1.

    I did a recent program challenge. The requirements were not too complicated.

    Basically I was given a simple csv formatted file (csv, of course, being a comma delimited text file). The challenge was to take this csv and parse it into a POCO- POCO being Plain Old Class Object. I’m not sure why we need a acronym for that. POCO is just a data structure in the form of a Class Object. But I digress.

    Once the csv is parsed into a Class Object, I was then to make it available in a Request/Response using NetMQ. Now on the surface this might seem a lot to do. But not really. The key, as always, is to break down the problem into the workable bits.

    We start with what we know some tasks:

    A) Input is a csv and it must be read into a Class Object.
    B) Using Request/Response pattern the csv must output using NetMQ (this part relies on getting A done correctly).
    C) The Request and Response should be in two separate applications. Task A will need to expose the Class Object as the Response, this is Application 1. Application 2 will be the Request that will output the Class Object. 

    So let’s look at  the first part of task A.

    Now as much as I like writing yet another file parser- not really- I opted in this case to use one that is already available. It’s call CsvHelper bu Josh Close. It’s available on NuGet of course. The nice thing about this one is it’s simple and it works with POCO’s.  You wire it up based on your class object.

    Let’s start with my POCO (this was given by looking at the csv that just happens to have the first row with column names):

    public class People
    {
        public string Id { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string City { get; set; }
        public string State { get; set; }
        public string Country { get; set; }
    }

    Now wiring this into the csv parser is a simple matter of having a text reader and creating a new csvreader with the helper:

    static List<People> giveMeData(TextReader textReader)
    {
        var csvReader = new CsvReader(textReader);
        var theData = csvReader.GetRecords<People>();
        return (theData.ToList());
    }

    Here I’ve method that parses the csv and makes a list of People.

    And that’s it for the first part of task A. The second part of task A has to do with exposing this List of People through NetMQ. 

    We will do this in next part of this blog.

     

  • .Net,  Build2019,  Microsoft

    Build 2019 Session: .Net Goodness

    Yes, I know I’m a little behind on picking out my favorite Build 2019 Session… So here the first one…

    Microsoft Build 2019 Developer Conference May 6-8 Seattle, WA

    Microsoft Build 2019 Developer Conference May 6-8 Seattle, WA

    .NET Platform Overview and Roadmap

    Join developers and industry experts at Microsoft Build to explore the latest developer tools and technologies. #MSBuild

    Source: .NET Platform Overview and Roadmap

  • .Net,  Microsoft

    From the Dot Net Config some Good Web Sites to check out.

    So in the travels about with the .Net Conf this week check out some site:

     

    Awesome .NET open source & community resources

     And…

    BuiltWithDot.Net is a community showcase of projects built with .net framework, .net core, xamarin, mono, mono game, unity, or godot. Anyone can submit.
     

    And…