c# – 在运行时替换web.config appsettings中的值(对于Active Di

我已经看到了使用ConfigurationManager的答案,但我认为我想要实现的目标略有不同.

我正在将MVC5部署为Azure云服务.客户希望单个交付包用于测试/用户接受/实时,并在Azure配置设置中存储所有(如果可能)设置.对于我们自己的appSettings值,这不是问题,将它们移动到ServiceConfiguration.cscfg并通过调用CloudConfigurationManager.GetSetting(如果部署在Azure角色中从Azure cscfg读取,或者如果在本地运行则从web.config读取)来读取它们.开发期间的IIS)

但是,Microsoft.Web.RedisSessionStateProvider仍然存在问题 – 它只支持从web.config读取设置(我通过电子邮件发送了Devs并证实了这一点)

我通过从Azure上的ServiceConfiguration.cscfg读取连接字符串并将其填充到内存中的web.config中来解决这个问题,如下所示,这似乎是允许MVC自己配置会话处理的可行方法.

private void UpdateConfigurationSettings()
    {
        // Obtain the RuntimeConfig type.
        var runtimeConfig = Type.GetType("System.Web.Configuration.RuntimeConfig,System.Web,Version=4.0.0.0,Culture=neutral,PublicKeyToken=b03f5f7f11d50a3a");

        // Obtain the RuntimeConfig instance.
        var runtimeConfigInstance = runtimeConfig.GetMethod("GetAppConfig",BindingFlags.NonPublic | BindingFlags.Static).Invoke(null,null);

        UpdateRedisSessionStateSettings(runtimeConfig,runtimeConfigInstance);
        UpdateAppSettings(runtimeConfig,runtimeConfigInstance);

    }

    private static void UpdateRedisSessionStateSettings(Type runtimeConfig,object runtimeConfigInstance)
    {
        // Obtain the SessionStateSection instance.
        SessionStateSection sessionStateSection =
            (SessionStateSection)
                runtimeConfig.GetProperty("SessionState",BindingFlags.NonPublic | BindingFlags.Instance)
                    .GetValue(runtimeConfigInstance,null);

        // Since the SessionStateSection is set to read only be dafault,we must make it writeable.
        typeof (ConfigurationElement).GetField("_bReadOnly",BindingFlags.NonPublic | BindingFlags.Instance)
            .SetValue(sessionStateSection,false);


        // Get the provider from the SessionStateSection
        var provider = sessionStateSection.Providers[0];

        // Since the provider is set to read only be dafault,BindingFlags.NonPublic | BindingFlags.Instance)
            .SetValue(provider,false);

        // Update the connection string paramter of the provider
        provider.Parameters.Set("connectionString",ConfigurationParameters.RedisCacheConnectionString);

        // Just read it back - this is only for debugging so I can see that the value has been updated.
        var c = provider.Parameters["connectionString"];
    }

问题是Active Directory

我现在真正的问题是Azure Active Directory设置,我希望做类似的事情,但我似乎无法使用相同的方法访问appSettings部分.尝试按如下方式读取appSettings会产生一个空指针,实际上如果调试到runtimeConfigInstance中,则每个其他部分都可用 – 但不是appSettings！

private void UpdateAppSettings(Type runtimeConfig,object runtimeConfigInstance)
    {
        // Obtain the AppSettings section instance.
        AppSettingsSection appSettingsSection =
            (AppSettingsSection)
                runtimeConfig.GetProperty("appSettings",null);

        // Since the AppSettings section is set to read only be dafault,we must make it writeable.
        typeof(ConfigurationElement).GetField("_bReadOnly",BindingFlags.NonPublic | BindingFlags.Instance)
            .SetValue(appSettingsSection,false);


    }

所以我的问题有两个方面：

>是否可以在不使用ConfigurationManager并保存文件的情况下以相同方式访问appSettings？
>是否有其他方法可以从Azure设置而不是web.config中读取Active Directory定义,以便为我们提供单个程序包可交付,其中所有设置都可在Azure上配置？

注意：我使用以下操作来使用从cscfg读取的值来操作FederationConfiguration,但appSettings键ida：FederationMetadataLocation ida：Realm ida：web.config中的AudienceUri也需要正确.

private void FederatedAuthenticationOnFederationConfigurationCreated(object sender,FederationConfigurationCreatedEventArgs args)
    {
        args.FederationConfiguration.IdentityConfiguration.AudienceRestriction.AllowedAudienceUris[0] = new Uri(ConfigurationParameters.ActiveDirectoryAudienceUri);
        args.FederationConfiguration.WsFederationConfiguration.Issuer = ConfigurationParameters.ActiveDirectoryIssuer;
        args.FederationConfiguration.WsFederationConfiguration.Realm = ConfigurationParameters.ActiveDirectoryRealm;
    }