'Owin.IAppBuilder' does not contain a definition for 'MapSignalR'

Question

Error

'Owin.IAppBuilder' does not contain a definition for 'MapSignalR' and no extension method 'MapSignalR' accepting a first argument of type 'Owin.IAppBuilder' could be found (are you missing a using directive or an assembly reference?)

Code

using Microsoft.Owin;
using Owin;

[assembly: OwinStartup(typeof(SignalRChat.Startup))]
namespace SignalRChat
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            // Any connection or hub wire up and configuration should go here
            app.MapSignalR();
        }
    }
}  

Any help would be greatly appreciated...

Update

signalR version 2.0.3
Microsoft Owin version 2.0.2
Owin version 1.0.0
Visual Studio 2012

Solution 1

Only install this nuget:

Install-Package Microsoft.AspNet.WebApi.OwinSelfHost

Solution 2

Finally was able to solve it by adding signalR dependencies before adding signalR from NuGet Packages
Step's I followed:

1. Added Microsoft.Owin //version 2.0.1
2. Added Microsoft.Owin.Security //version 2.0.1
3. Added Microsoft Asp.Net SignalR

The reason I discovered was a problem with version 2.0.2 of Microsoft.Owin and Microsoft.Owin.Security and then adding a class named Startup.cs with following code:

using Microsoft.Owin;
using Owin;

[assembly: OwinStartup(typeof(webApp.Startup))]
namespace webApp
{
    public static class Startup
    {
        public static void Configuration(IAppBuilder app)
        {
            app.MapSignalR();
        }
    }
}  

Directly adding Microsoft Asp.Net SignalR from NuGet adds version 2.0.2 of Microsoft.Owin and Microsoft.Owin.Security which creates the problem.
Hope it helps someone...!!

Solution 3

Update-Package Owin -Reinstall

worked for me

Solution 4

Install Nuget Package: Microsoft.AspNet.Identity.Owin

Solution 5

Using MVC5, enter your Startup.cs file.

Add IAppBuilder appBuilder to Configure():

 public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IAppBuilder appBuilder)
    {

Then, under

app.UseMvc(routes =>
{
    routes.MapRoute(
        name: "default",
        template: "{controller=Home}/{action=Index}/{id?}");
});

add appBuilder.MapSignalR();

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Comments

[chavakane]

Thanks! You saved me from getting very frustrated on a Friday night!

[Greg Bogumil]

FYI as of 2/15/2015 this seems to have been resolved. I only installed Microsoft.AspNet.SignalR directly and the above worked fine.

[Bhavik]

This is an old solution. Do refer the answer by @mggSoft for the latest answer.

[jward01]

Worked for me too thank you. I tried the other solutions above and they did not work. This one did.

[feganmeister]

Need to install this nuget too: Install-Package Microsoft.Owin.Cors -Version 3.1.0

[S.Mohamed Mahdi Ahmadian zadeh]

Thank you so much my friend... your solution solved my problem which I was working for 1 hours...