使用 StructureMap 时传递构造函数参数 [英] Passing constructor arguments when using StructureMap

问题描述

我的 DI 使用 StructureMap.想象一下，我有一个类需要 1 个参数，例如:

I'm using StructureMap for my DI. Imagine I have a class that takes 1 argument like:

public class ProductProvider : IProductProvider
{
     public ProductProvider(string connectionString)
     { 
         ....
     }
}

当我获得 IProductProvider 的实例时，我需要指定connectionString 在运行时.

I need to specify the "connectionString at run-time when I get an instance of IProductProvider.

我已将 StructureMap 配置如下:

I have configured StructureMap as follows:

ForRequestedType<IProductProvider>.TheDefault.Is.OfConcreteType<ProductProvider>().  
WithCtorArgument("connectionString");

但是，我不想在这里调用 EqualTo("something...") 方法，因为我需要一些工具来在运行时动态指定此值.

However, I don't want to call EqualTo("something...") method here as I need some facility to dynamically specify this value at run-time.

我的问题是:如何使用 ObjectFactory 获取 IProductProvider 的实例?

My question is: how can I get an instance of IProductProvider by using ObjectFactory?

目前，我有类似的东西:

Currently, I have something like:

ObjectFactory.GetInstance<IProductProvider>();  

但如你所知，这行不通...

But as you know, this doesn't work...

任何建议将不胜感激.

推荐答案

我自己找到了答案！解决办法如下:

I found the answer myself! Here is the solution:

ObjectFactory.With("connectionString").EqualTo(someValueAtRunTime).GetInstance<IProductProvider>();

希望这能帮助遇到相同问题的其他人.

Hope this helps others who have come across the same issue.

这篇关于使用 StructureMap 时传递构造函数参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！