asp.net - Owin.IAppBuilder 不包含 asp.net 中 'MapSignalR' 错误的定义

Question

我收到此错误

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?)

这是我的代码

 using System;
 using System.Threading.Tasks;
 using Microsoft.Owin;
 using Owin;

 [assembly: OwinStartup(typeof(VirtualClassroom.Startup1))]

 namespace VirtualClassroom
 {
     public class Startup1
        {
           public void Configuration(IAppBuilder app)
               {
                    app.MapSignalR();

               }
        } 

}
我搜索了很多并按照堆栈溢出答案进行了尝试
'Owin.IAppBuilder' does not contain a definition for 'MapSignalR'我有

1.新增Microsoft.Owin//2.0.1版

2.新增Microsoft.Owin.Security//2.0.1版

3.新增微软Asp.Net SignalR

但我仍然遇到同样的错误。请帮忙。提前致谢!!

Answer 1

看来您的 Microsoft.AspNet.SignalR.Core.dll 版本较旧, 去 nuGet 并安装这个包，你应该看到这个扩展方法......


然后你应该会看到一堆这样的方法 public static IAppBuilder MapSignalR(this IAppBuilder builder);下 OwinExtensions .

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