ASP.NET Core 1.1 & ReactJS

[DaveKP]

Couldn't find a better place to ask - Should ReactJS be working with .net Core 1.1?

I'm getting :

ReactNotInitialisedException: ReactJS.NET has not been initialised correctly. Please ensure you have called app.AddReact() and app.UseReact() in your Startup.cs file.

When trying to use server-side rendering.

I can't see anything that I've mis-configured though, based on the tutorial code.

Startup.cs.txt

[DaveKP]

Okay, so i managed to get things working. I imported React.Core and React.AspNet from the GitHub repo. In Initialiser.cs - the IsReactAssembly() method - for me the assembly names were coming in all lower case, so I changed the string comparisons inside the method.

I haven't had time to search for why they're coming in lower case, anyone know?

I'm messing around in VS 2017 RC at the moment, so my environment's a mess - but I'll make a pull request when I have time to sort things out. It's bedtime here!

[Daniel15]

Hmm strange - I'm running http://dan.cx/socialfeed.htm on Mono 4.x + ASP.NET Core 1.1 + ReactJS.NET 3.0 and it's working fine.

[chanan]

Hi,

I think I might have more information on this problem. I have the same exact (I am pretty sure) project (Core 1.1) in VS2015 and in VS2017 RC. I believe the only difference is that in 2017 the project is using the new csproj file format. React.Net works for me in VS2015 but in VS2017 I get the "ReactNotInitialisedException: ReactJS.NET has not been initialised correctly. Please ensure you have called app.AddReact() and app.UseReact() in your Startup.cs file." message.

[Daniel15]

@chanan - Hmm, I haven't tested on VS2017 RC yet. Did you add app.AddReact and app.UseReact to your Startup.cs file like the message says? What's the full error message and stack trace you're seeing?

[chanan]

Yes both in VS2015 and VS2017 RC the startup and all the other files are the same.

I cant give you a stack trace now since I screw up the csproj file somehow trying to figure out how to get ReactJS.Net to work (and eventually I moved back to VS2015 on a hunch). However, in other issues posted here someone else posted a tack trace that looks like mine (at least from memory). The issue seems to be with TinyIoC.

[ghost]

Have the same issue here using VS2017 RC + ASP.NET Core 1.1 + ReactJS.NET 3.0, I can say that the method app.AddReact() doesn't exists in the Configure section.

[Daniel15]

You need to call AddReact to configure ReactJS.NET otherwise it won't work properly. Sent from my phone. On Jan 6, 2017 9:36 AM, "Etienne S.G" <[email protected]> wrote: Have the same issue here using VS2017 RC + ASP.NET Core 1.1 + ReactJS.NET 3.0, I can say that the method app.AddReact() doesn't exists in the Configure section. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#353 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAFnHZwlrz_yOUzi8Yw2XNTJt9-Bnye3ks5rPX5-gaJpZM4K9Kl9> .

[chanan]

@Daniel15 I pasted a working code in VS2015 and the same project once upgraded to 2017 stops working. The stack trace and link to the most simple of all projects is in #361

[ghost]

My Startup.cs class is the following, but I'm still getting the same error with VS2017 RC:

public class Startup
{
        public void ConfigureServices(IServiceCollection services)
        {
            // Add React
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            services.AddReact();

            // Add framework services
            services.AddMvc();
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            app.UseReact();
            app.UseStaticFiles();            
            app.UseMvc(routes => 
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}");
            });
    }
}

And I have the Tutorial.jsx file under wwwroot\js directory, as well has the configuration for the view from the tuturial:

@{
    Layout = null;
}
<html>
<head>
    <title>Hello React</title>
</head>
<body>
    <div id="content"></div>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.3.2/react.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.3.2/react-dom.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/remarkable/1.7.1/remarkable.min.js"></script>
    <script src="@Url.Content("~/js/tutorial.jsx")"></script>
</body>
</html>

[DaveKP]

Have those still encountering problems tried using the development version of ReactJS.net including #354 ?

[Daniel15]

If you want to try the development version, you can use the NuGet package server on our AppVeyor build (https://ci.appveyor.com/nuget/reactjs.net/). Instructions are available at https://reactjs.net/getting-started/download.html#development-builds

I haven't had time to try VS2017 RC yet. @DaveKP Do you think that diff solves the issues with VS2017?

[DaveKP]

@Daniel15 Yes, that diff fixed the issue for me which was using VS2017. I would expect it to work for others as well, but I never did figure out exactly why it was happening.

[Daniel15]

I pushed out #354 as ReactJS.NET 3.0.1. Let me know if you still encounter issues. This fix seemed to fix the issue for me.