I have Visual Studio 2019 installed on my machine (think its 16.4 version) so the dotnet core SDK comes along with it. All of below commands I ran from VS Developer command prompt.
> dotnet --version 3.1.101
To get started, create a new project as below:
> dotnet new blazorwasm -o CICalc No templates matched the input template name: blazorwasm.
Hmmm...I thought I had this covered as I have VS 2019!!! So, I need to install the template.
> dotnet new --install Microsoft.AspNetCore.Components.WebAssembly.Templates::3.2.0 > dotnet new blazorwasm -o CICalc The template "Blazor WebAssembly App" was created successfully. Processing post-creation actions... Running 'dotnet restore' on C:\Work\BuildChallenge\CICalc\CICalc.csproj... Restore completed in 10 sec for C:\Work\BuildChallenge\CICalc\CICalc.csproj. Restore succeeded.
This is cool! Lets run...
> dotnet run <bunch of build errors>
This is tricky! So, lets copy that error and Google...and I figure that I should update to latest dotnet core SDK. So, I did a VS update from from 16.4 to 16.6. If you do not have Visual Studio then download the latest .NET core SDK from here.
> dotnet --version 3.1.300 > dotnet run crit: Microsoft.AspNetCore.Server.Kestrel Unable to start Kestrel. System.InvalidOperationException: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found or is out of date. To generate a developer certificate run 'dotnet dev-certs https'. To trust the certificate (Windows and macOS only) run 'dotnet dev-certs https --trust'. For more information on configuring HTTPS see https://go.microsoft.com/fwlink/?linkid=848054. <<snip>>
Wait, when dotnet core SDK is installed, it should come with a developer certificate. Lets generate a certificate and trust the same:
> dotnet dev-certs https > dotnet dev-certs https --trust
This gives a pop-up like below!!
Restart the command prompt and go to project folder and run the app. If it still does not work (which was the case with me!!), do the following:
> dotnet dev-certs https --clean > dotnet dev-certs https -t
After running these, restart the developer command prompt and go to the project folder and run:
C:\Work\BuildChallenge\CICalc>dotnet run info: Microsoft.Hosting.Lifetime Now listening on: https://localhost:5001 info: Microsoft.Hosting.Lifetime Now listening on: http://localhost:5000 info: Microsoft.Hosting.Lifetime Application started. Press Ctrl+C to shut down. info: Microsoft.Hosting.Lifetime Hosting environment: Development info: Microsoft.Hosting.Lifetime Content root path: C:\Work\BuildChallenge\CICalc
And open browser with https://localhost:5001 and you should see your First Blazor app: