asp.net-mvc - 更新 nuget 后 StackExchange.Redis.Extensions 错误

Question

我已更新到最新的 StackExchange.Redis.Extensions.Core 包，但出现以下错误。

StackExchange.Redis.Extensions.Core 之前的版本是 - 2.3.0 更新后的新版本是 - 3.4.0

None of the constructors found with 'Autofac.Core.Activators.Reflection.DefaultConstructorFinder' on type 'StackExchange.Redis.Extensions.Core.StackExchangeRedisCacheClient' can be invoked with the available services and parameters:
Cannot resolve parameter 'StackExchange.Redis.Extensions.Core.Configuration.RedisConfiguration configuration' of constructor 'Void .ctor(StackExchange.Redis.Extensions.Core.ISerializer, StackExchange.Redis.Extensions.Core.Configuration.RedisConfiguration)'.
Cannot resolve parameter 'System.String connectionString' of constructor 'Void .ctor(StackExchange.Redis.Extensions.Core.ISerializer, System.String, System.String)'.
Cannot resolve parameter 'System.String connectionString' of constructor 'Void .ctor(StackExchange.Redis.Extensions.Core.ISerializer, System.String, Int32, System.String)'.
Cannot resolve parameter 'StackExchange.Redis.IConnectionMultiplexer connectionMultiplexer' of constructor 'Void .ctor(StackExchange.Redis.IConnectionMultiplexer, StackExchange.Redis.Extensions.Core.ISerializer, System.String)'.
Cannot resolve parameter 'StackExchange.Redis.IConnectionMultiplexer connectionMultiplexer' of constructor 'Void .ctor(StackExchange.Redis.IConnectionMultiplexer, StackExchange.Redis.Extensions.Core.ISerializer, StackExchange.Redis.Extensions.Core.Configuration.ServerEnumerationStrategy, System.String)'.
Cannot resolve parameter 'StackExchange.Redis.IConnectionMultiplexer connectionMultiplexer' of constructor 'Void .ctor(StackExchange.Redis.IConnectionMultiplexer, StackExchange.Redis.Extensions.Core.ISerializer, Int32, System.String)'.
Cannot resolve parameter 'StackExchange.Redis.IConnectionMultiplexer connectionMultiplexer' of constructor 'Void .ctor(StackExchange.Redis.IConnectionMultiplexer, StackExchange.Redis.Extensions.Core.ISerializer, StackExchange.Redis.Extensions.Core.Configuration.ServerEnumerationStrategy, Int32, System.String)'.

我已经安装了以下 nuget 包:

Microsoft.Web.RedisSessionStateProvider

StackExchange.Redis
StackExchange.Redis.StrongName

StackExchange.Redis.Extensions.Core
StackExchange.Redis.Extensions.LegacyConfiguration
StackExchange.Redis.Extensions.Newtonsoft

我的web.config如下:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>   
    <section name="redisCacheClient" type="StackExchange.Redis.Extensions.LegacyConfiguration.RedisCachingSectionHandler, StackExchange.Redis.Extensions.LegacyConfiguration" />
    </configSections>
  <redisCacheClient allowAdmin="true" ssl="True" connectTimeout="3000" database="15" password="IlQZ--------90=">
    <serverEnumerationStrategy mode="Single" targetRole="PreferSlave" unreachableServerAction="IgnoreIfOtherAvailable" />
    <hosts>
      <add host="xxxxxx.redis.cache.windows.net" cachePort="6380" />
    </hosts>
  </redisCacheClient>
  <connectionStrings>
    <add name="RedisConnectionString" connectionString="xxxx.redis.cache.windows.net:6380,password=IlQZ--------90=,ssl=True,synctimeout=15000,abortConnect=False" />
  </connectionStrings>
  <appSettings>

  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.6.1" />
    <httpRuntime targetFramework="4.6.1" />
  </system.web>
  <runtime>
    <assemblyBinding
        xmlns="urn:schemas-microsoft-com:asm.v1">          
      <dependentAssembly>
        <assemblyIdentity name="Autofac" publicKeyToken="17863af14b0044da" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-4.8.1.0" newVersion="4.8.1.0" />
      </dependentAssembly> 

      <!-- more dependentAssembly -->

      <dependentAssembly>
        <assemblyIdentity name="StackExchange.Redis.Extensions.Core" publicKeyToken="d7d863643bcd13ef" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-3.4.0.0" newVersion="3.4.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

我的带有 autofac 的 OWIN 启动类如下:

public void Configuration(IAppBuilder app)
{
    var builder = new ContainerBuilder();
    builder.RegisterControllers(typeof(MvcApplication).Assembly);

    builder.RegisterType<NewtonsoftSerializer>()
        .AsSelf()
        .AsImplementedInterfaces()
        .SingleInstance();

    builder.RegisterType<StackExchangeRedisCacheClient>()
        .AsSelf()
        .AsImplementedInterfaces()
        .SingleInstance();

    var container = builder.Build();
    DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

    app.UseAutofacMiddleware(container);
    app.UseAutofacMvc();
}

我做错了什么？

Answer 1

Autofac 不能解决任何你没有告诉它的事情。你告诉过它:

• 您的控制者。
• NewtonsoftSerializer
• StackExchangeRedisClient

但是请阅读异常 - StackExchangeRedisClient 没有无参数构造函数，并且您没有告诉 Autofac 任何其他信息。 Autofac 不只是“读取 web.config”或其他任何东西。你必须把它放在一起。再次阅读异常并注册其中一个构造函数将匹配的足够内容。

这不是真正的代码但给了你一个想法:

// THIS ISN'T TESTED, FOR IDEA PURPOSES ONLY
builder.Register(c => {
  var config = ConfigurationManager.GetSection("RedisCacheClient");
  var connectionString = config.ConnectionStrings[0];
  return new StackExchangeRedisClient(connectionString);
}).AsSelf()
.AsImplementedInterfaces()
.SingleInstance();

要点是，您必须阅读配置，或在容器中注册一些东西，否则将满足创建 Redis 客户端所需的参数。