将 DryIoc 与依赖项和原始值一起使用

Question

我正在注册要为接口创建的实现。此实现构造函数具有三个参数：

public ProfileImageService(ISqlConnection connection, string localStorageLocation, string serverPath)

我已经像这样注册了 ISqlConnection：

c.Register<Data.ISqlConnection, Data.TsqlConnection>(setup: Setup.With(openResolutionScope: true));

然而，当我像这样注册 ProfileImageService 时：

c.Register<Data.Services.Profile.IImageService, Data.Services.Profile.ProfileImageService>(Made.Of(() => new Data.Services.Profile.ProfileImageService(Arg.Index<Data.ISqlConnection>(0), Arg.Index<string>(1), Arg.Index<string>(2)), requestIgnored =>c.Resolve<Data.ISqlConnection>(), requestIgnored => localImageStoragePath, requestIgnored => localImageUrl));

我收到以下错误：

Message=State is required to use (probably to inject) item Abc.Data.TsqlConnection. To enable item use you may specify container.With(rules => rules.WithItemToExpressionConverter(YOUR_ITEM_TO_EXPRESSION_DELEGATE)).

我已经阅读了这篇文章 SpecifyDependencyAndPrimitiveValues 并尝试像他们那样对其进行返工，但他们的示例只显示了原语或依赖关系，而不是两者，我找不到它们混合在一起而没有编译错误的语法.谁能给我一些关于如何注册这个实例的指导，指定两个字符串的值和依赖项的值？

Answer 1

操作方法如下（使用最新的 DryIoc v2.10.6）：您不需要在参数中指定 c.Resolve<ISqlConnection>()，只需使用 Arg.Of<ISqlConnection>():

using System;
using DryIoc;

public class Program
{
    public static void Main()
    {
        var c = new Container();

        var localImageStoragePath = "a";
        var localImageUrl = "b";

        c.Register<ISqlConnection, TsqlConnection>();
        c.Register<IImageService, ProfileImageService>(
            Made.Of(() => new ProfileImageService(
                Arg.Of<ISqlConnection>(), 
                Arg.Index<string>(0), 
                Arg.Index<string>(1)), 
                _ => localImageStoragePath, 
                _ => localImageUrl));

        var imgService = c.Resolve<IImageService>();

        Console.WriteLine(imgService);
    }

    public interface IImageService {}

    public class ProfileImageService: IImageService
    {
        public ProfileImageService(ISqlConnection conn, string a, string b) {}

    }

    public interface ISqlConnection {}

    public class TsqlConnection : ISqlConnection {} 
}

或者更好的是，如果您的字符串参数不应该被更改：

    c.Register<IImageService, ProfileImageService>(
        Made.Of(() => new ProfileImageService(
            Arg.Of<ISqlConnection>(), 
            localImageStoragePath, 
            localImageUrl)));

这里是 live proof.

将 DryIoc 与依赖项和原始值一起使用

Using DryIoc with a dependency and primitive values

c#

dependency-injection

asp.net-web-api

dryioc