OWinStartup，OWinStartupAttribute not found＆'Owin.IAppBuilder'沒有包含'Map'的定義

Question

將我的asp.net webform網站從Owin 2.1.0升級到Owin 3.0.1後，我有前面提到的編譯錯誤...我正在嘗試使用SignalR 2和CORS。這裏是我的packages.config：

<?xml version="1.0" encoding="utf-8"?> 
<packages> 
    <package id="jQuery" version="2.1.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.Cors" version="5.2.3" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.SignalR" version="2.2.0" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.SignalR.Core" version="2.2.0" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.SignalR.JS" version="2.2.0" targetFramework="net45" /> 
    <package id="Microsoft.AspNet.SignalR.SystemWeb" version="2.2.0" targetFramework="net45" /> 
    <package id="Microsoft.Owin" version="3.0.1" targetFramework="net45" /> 
    <package id="Microsoft.Owin.Cors" version="3.0.1" targetFramework="net45" /> 
    <package id="Microsoft.Owin.Host.SystemWeb" version="3.0.1" targetFramework="net45" /> 
    <package id="Microsoft.Owin.Security" version="3.0.1" targetFramework="net45" /> 
    <package id="Newtonsoft.Json" version="6.0.8" targetFramework="net45" /> 
    <package id="Owin" version="1.0" targetFramework="net45" /> 
</packages> 

我OwinStartup類是在web.config中定義中的AppSettings如下：

<add key="owin:AppStartup" value="SignalRStartup, App_Code" /> 

這是什麼類的樣子：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using Owin; 
using Microsoft.Owin; 
using Microsoft.AspNet.SignalR; 
using Microsoft.Owin.Cors; 
using System.IO; 

[assembly: OwinStartup(typeof(SignalRStartup))] 
public class SignalRStartup 
{ 
    public void Configuration(IAppBuilder app) 
    { 

     // Enable detailed errors (remember to remove it 
     var hubConfiguration = new HubConfiguration(); 
     hubConfiguration.EnableDetailedErrors = true; 
     //hubConfiguration.EnableCrossDomain = true; 
     app.UseCors(CorsOptions.AllowAll); 
     app.MapSignalR(hubConfiguration); 
    } 
} 

另請注意，我不能使用app.Map("/signalr", map => { ... }); ...

編輯： 我在web.config中找到這些行，我沒升級前有：

<runtime> 
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> 
     <dependentAssembly> 
     <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" /> 
     <bindingRedirect oldVersion="0.0.0.0-2.1.0.0" newVersion="3.0.1.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="System.Web.Cors" publicKeyToken="31bf3856ad364e35" culture="neutral" /> 
     <bindingRedirect oldVersion="0.0.0.0-5.2.3.0" newVersion="5.2.3.0" /> 
     </dependentAssembly> 
     <dependentAssembly> 
     <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" /> 
     <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" /> 
     </dependentAssembly> 
    </assemblyBinding> 
    </runtime> 

我快要放棄的時候，請如果您有任何想法...

Answer 1

耶！找到了 ！很多非常感謝這篇文章： The type or namespace IAppBuilder could not be found(missing using a directive pr an assembly reference)。

我的問題是由重新安裝Microsoft.owin像Иво Недев解決建議：

PM> Update-Package Microsoft.Owin -Reinstall 
Removing 'Microsoft.Owin 3.0.1' from ww. 
Value does not fall within the expected range. 
Successfully removed 'Microsoft.Owin 3.0.1' from ww. 
Removing 'Owin 1.0' from ww. 
Successfully removed 'Owin 1.0' from ww. 
Uninstalling 'Microsoft.Owin 3.0.1'. 
Successfully uninstalled 'Microsoft.Owin 3.0.1'. 
Uninstalling 'Owin 1.0'. 
Successfully uninstalled 'Owin 1.0'. 
Attempting to resolve dependency 'Owin (≥ 1.0)'. 
Installing 'Owin 1.0'. 
Successfully installed 'Owin 1.0'. 
Installing 'Microsoft.Owin 3.0.1'. 
You are downloading Microsoft.Owin from Microsoft, the license agreement to which is available at http://www.microsoft.com/web/webpi/eula/net_library_eula_enu.htm. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device. 
Successfully installed 'Microsoft.Owin 3.0.1'. 
Adding 'Owin 1.0' to ww. 
Successfully added 'Owin 1.0' to ww. 
Adding 'Microsoft.Owin 3.0.1' to ww. 
Successfully added 'Microsoft.Owin 3.0.1' to ww. 

我的頭現在可以停止流血:-P