SignalR学习错误总结

错误001

“System.IO.FileLoadException”类型的异常在 mscorlib.dll 中发生，但未在用户代码中进行处理

其他信息: 未能加载文件或程序集“Newtonsoft.Json, Version=4.5.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed”或它的某一个依赖项。找到的程序集清单定义与程序集引用不匹配。 (异常来自 HRESULT:0x80131040)

解决方案：

在web.cinfig添加配置：

<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="6.0.0.0" />
</dependentAssembly>

如下图：

错误二：

The following errors occurred while attempting to load the app.
- No assembly found containing an OwinStartupAttribute.
- No assembly found containing a Startup or [AssemblyName].Startup class.
To disable OWIN startup discovery, add the appSetting owin:AutomaticAppStartup with a value of "false" in your web.config.
To specify the OWIN startup Assembly, Class, or Method, add the appSetting owin:AppStartup with the fully qualified startup class or configuration method name in your web.config.

解决方案：

在项目中加类

using Microsoft.Owin;
using Owin;

[assembly: OwinStartup(typeof(SignalRQuickStart.Startup))]

namespace SignalRQuickStart
{
public class Startup
{
public void Configuration(IAppBuilder app)
{
// 有关如何配置应用程序的详细信息，请访问 http://go.microsoft.com/fwlink/?LinkID=316888

// 配置集线器
app.MapSignalR();
}
}
}

如图：

 

错误3

The following errors occurred while attempting to load the app.
- No assembly found containing an OwinStartupAttribute.
- The discovered startup type 'Microsoft.VisualStudio.Web.PageInspector.Runtime.Startup, Microsoft.VisualStudio.Web.PageInspector.Runtime, Version=1.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' conflicts with the type 'SignalRT1.Startup, SignalRT1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. Remove or rename one of the types, or reference the desired type directly.
To disable OWIN startup discovery, add the appSetting owin:AutomaticAppStartup with a value of "false" in your web.config.
To specify the OWIN startup Assembly, Class, or Method, add the appSetting owin:AppStartup with the fully qualified startup class or configuration method name in your web.config.

原因：没有标注[assembly: OwinStartup(typeof(SignalRT1.Startup))]

解决方法：

标注图：如下：

 错误05 提示JS找不到后台某个方法：