C# 简单喷油器4.1：超越参数喷油行为

我对在C#中使用DI还不太熟悉，并了解了Windsor、Ninject、Autofac、Unity和Simple Injector。我最初放弃了Simple Injector，因为我需要值类型注入（fx.connection字符串），但发现了一篇描述此内容的博客文章：。不幸的是，由于版本4.1中不推荐使用

IDependencyInjectionBehavior.BuildExpression

，并且引入了

IDependencyInjectionBehavior.GetInstanceProducer

，因此blogpost已经过时。 我不知道如何使用新的InstanceProducer实现博客文章中描述的功能

InstanceProducer

有一个静态方法

FromExpression

，但我不确定应该使用哪种类型等

我目前使用纯DI，并具有以下设置：

// Settings
var conLocal = ConfigurationManager.ConnectionStrings["APIPortMan"].ConnectionString;
var con = ConfigurationManager.ConnectionStrings["PortMan"].ConnectionString;
var conAzure = ConfigurationManager.ConnectionStrings["Azure"].ConnectionString;
var conSitecore = ConfigurationManager.ConnectionStrings["Sitecore"].ConnectionString;
var azureStorageAccount = ConfigurationManager.AppSettings.Get("StorageConnection");
var reportUploadPath = ConfigurationManager.AppSettings.Get("ReportUploadPath");
var PfsmlPath = ConfigurationManager.AppSettings.Get("PfsmlPath");
var reloadCounter = int.Parse(ConfigurationManager.AppSettings.Get("transactionServiceReloadCounter"));
var systemStartDate = DateTime.Parse(ConfigurationManager.AppSettings.Get("holdingServiceStartDate"));
var semaphoreCount = int.Parse(ConfigurationManager.AppSettings.Get("semaphoreCount"));

// Repositories
var _accountRepository = new AccountRepository(con, conAzure);
var _aggregatedPortfolioRelationshipRepository = new AggregatedPortfolioRelationshipRepository(conAzure);
var _aggregatedClientRelationshipRepository = new AggregatedClientRelationshipRepository(con, conAzure);
var _assetBondRepository = new AssetBondRepository(con, conAzure);
var _assetClassRepository = new AssetClassRepository(con, conAzure);
var _assetDerivativeRepository = new AssetDerivativeRepository(con, conAzure);
var _assetRepository = new AssetRepository(con, conAzure);
var _benchmarkRepository = new BenchmarkRepository(con, conAzure);
var _benchmarkWeightRepository = new BenchmarkWeightRepository(con, conAzure);
var _clientRepository = new ClientRepository(con, conAzure);
var _defaultPriceRepository = new DefaultPriceRepository(con, conAzure);
var _emailRepository = new UpdateEmailOutput(conAzure);
var _exchangeRateRepository = new ExchangeRateRepository(con, conAzure);
var _failedHoldingRepository = new FailedHoldingRepository(conLocal);
var _GICSRepository = new GICSRepository(con, conAzure);
var _holdingRepository = new HoldingRepository(conAzure);
var _limitLineRepository = new LimitLineRepository(con, conAzure);
var _PFSMLRepository = new PFSMLRepository(PfsmlPath);
var _portfolioRepository = new PortfolioRepository(con, conAzure);
var _sitecoreReportRepository = new SitecoreReportRepository(conSitecore, reportUploadPath);
var _systemInfoRepository = new SystemInfoRepository(conAzure);
var _transactionRepository = new TransactionRepository(con, conAzure);

然后我有一些存储库使用这些设置：

// Settings
var conLocal = ConfigurationManager.ConnectionStrings["APIPortMan"].ConnectionString;
var con = ConfigurationManager.ConnectionStrings["PortMan"].ConnectionString;
var conAzure = ConfigurationManager.ConnectionStrings["Azure"].ConnectionString;
var conSitecore = ConfigurationManager.ConnectionStrings["Sitecore"].ConnectionString;
var azureStorageAccount = ConfigurationManager.AppSettings.Get("StorageConnection");
var reportUploadPath = ConfigurationManager.AppSettings.Get("ReportUploadPath");
var PfsmlPath = ConfigurationManager.AppSettings.Get("PfsmlPath");
var reloadCounter = int.Parse(ConfigurationManager.AppSettings.Get("transactionServiceReloadCounter"));
var systemStartDate = DateTime.Parse(ConfigurationManager.AppSettings.Get("holdingServiceStartDate"));
var semaphoreCount = int.Parse(ConfigurationManager.AppSettings.Get("semaphoreCount"));

// Repositories
var _accountRepository = new AccountRepository(con, conAzure);
var _aggregatedPortfolioRelationshipRepository = new AggregatedPortfolioRelationshipRepository(conAzure);
var _aggregatedClientRelationshipRepository = new AggregatedClientRelationshipRepository(con, conAzure);
var _assetBondRepository = new AssetBondRepository(con, conAzure);
var _assetClassRepository = new AssetClassRepository(con, conAzure);
var _assetDerivativeRepository = new AssetDerivativeRepository(con, conAzure);
var _assetRepository = new AssetRepository(con, conAzure);
var _benchmarkRepository = new BenchmarkRepository(con, conAzure);
var _benchmarkWeightRepository = new BenchmarkWeightRepository(con, conAzure);
var _clientRepository = new ClientRepository(con, conAzure);
var _defaultPriceRepository = new DefaultPriceRepository(con, conAzure);
var _emailRepository = new UpdateEmailOutput(conAzure);
var _exchangeRateRepository = new ExchangeRateRepository(con, conAzure);
var _failedHoldingRepository = new FailedHoldingRepository(conLocal);
var _GICSRepository = new GICSRepository(con, conAzure);
var _holdingRepository = new HoldingRepository(conAzure);
var _limitLineRepository = new LimitLineRepository(con, conAzure);
var _PFSMLRepository = new PFSMLRepository(PfsmlPath);
var _portfolioRepository = new PortfolioRepository(con, conAzure);
var _sitecoreReportRepository = new SitecoreReportRepository(conSitecore, reportUploadPath);
var _systemInfoRepository = new SystemInfoRepository(conAzure);
var _transactionRepository = new TransactionRepository(con, conAzure);

然后是一些使用存储库和一些设置的服务

由于大多数存储库共享一个公共接口

IRepository

（除了像

IAssetRepository

这样的单独接口，它扩展了IRepository的类型

资产

），我希望能够使用批创建/自动连接。此外，我希望避免每次更改主代码（即新构造函数参数、新存储库接口/类等）时都更改DI设置。另外，我希望避免在注册过程中使用lambda的“new”和

getInstance

，因为每当我更改构造函数时，这将需要更改DI设置

---

我已经在构造函数中采用了blogpost中提到的约定（使用

AzureConnectionString

，

PortManConnectionString

等）。我现在需要做的就是确保Simple Injector按照约定处理值类型参数：）

我在Github上发布了相同的问题（正如Steven所指出的）。 包含基于约定方法的更新版本，尽管Steven/dotnetjunkie说服我采用不同的方法（使用设置对象）。

Duplicate: