变化与统一

构造注入字符串参数

我的目标是改变一个字符串参数：变化与统一

Container 
.RegisterInstance<string>("us", @"\\ad1\accounting$\Xml\qb_us.xml") 
.RegisterInstance<string>("intl", @"\\ad1\accounting$\Xml\qb_intl.xml"); 

driver = Container.Resolve<LoaderDriver>(args[1]); // "us" or "intl"

导致：

Resolution of the dependency failed, type = "QuickBooksService.LoaderDriver", name = "intl". 
Exception occurred while: while resolving. 
Exception is: InvalidOperationException - The type String cannot be constructed. You must configure the container to supply this value. 
----------------------------------------------- 
At the time of the exception, the container was: 

    Resolving QuickBooksService.LoaderDriver,intl 
    Resolving parameter "reader" of constructor QuickBooksService.LoaderDriver(QuickBooksService.LoaderInputReader reader, QuickBooksService.ILoader[] loaders) 
    Resolving QuickBooksService.LoaderInputReader,(none) 
    Resolving parameter "inputFile" of constructor QuickBooksService.LoaderInputReader(System.String inputFile, AccountingBackupWeb.Models.AccountingBackup.Company company, Qu 
ickBooksService.eTargets targets) 
     Resolving System.String,(none)

这显然是错误的，但它的唯一途径我能得到它的工作：

if (args[1] == "us") 
    Container 
     .RegisterType<LoaderInputReader>(
      new InjectionConstructor(
       @"\\ad1\accounting$\Xml\qb_us.xml", 
       new ResolvedParameter<Company>(), 
       new ResolvedParameter<eTargets>() 
      ) 
     ) 
    ; 
else if (args[1] == "intl") 
    Container 
     .RegisterType<LoaderInputReader>(
      new InjectionConstructor(
       @"\\ad1\accounting$\Xml\qb_intl.xml", 
       new ResolvedParameter<Company>(), 
       new ResolvedParameter<eTargets>() 
      ) 
     ) 
    ; 
else 
    throw new Exception("invalid company"); 

driver = Container.Resolve<LoaderDriver>();

来源

2011-11-18 Aaron Anodide

像这样的东西应该工作：

container 
    .RegisterType<LoaderInputReader>(
     "us", 
     new InjectionConstructor(
      @"\\ad1\accounting$\Xml\qb_us.xml", 
      new ResolvedParameter<Company>(), 
      new ResolvedParameter<eTargets>())); 
container 
    .RegisterType<LoaderInputReader>(
     "intl", 
     new InjectionConstructor(
      @"\\ad1\accounting$\Xml\qb_intl.xml", 
      new ResolvedParameter<Company>(), 
      new ResolvedParameter<eTargets>()));

这名LoaderInputReader每个注册。现在，你可以解决这样的：

var us = container.Resolve<LoaderInputReader>("us"); 
var intl = container.Resolve<LoaderInputReader>("intl");

来源

2011-11-18 20:43:28

您可以简化这一点了，说：container.RegisterType （ “我们”，新InjectionConstructor（字符串的typeof（公司）的typeof（eTargets））;你只需要明确地使用ResolvedParameter，如果你正在解决一个命名的依赖关系。 –

谢谢你们真的帮助我走出了noob区域 –

也许你可以改变

driver = Container.Resolve<LoaderDriver>(args[1]); // "us" or "intl"

与

driver = Container.Resolve<LoaderDriver>(Container.Resolve<string>(args[1]))

这需要的Resolve overload that takes a name，凡在你的情况下，名字来源于你的论点的优势。

来源

2011-11-18 19:54:50 Kit

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