ABP.IO WEB應用程式框架 DI 單一介面多個實作

簡單筆記下如何統一呼叫共用介面的複數實作 (class)

結論

ITestManager

public interface ITestManager
{
    string GetString();
}

OneManager

public class OneManager : ITestManager
{
    public string GetString() => "One";
}

TwoManager

public class TwoManager : ITestManager
{
    public string GetString() => "Two";
}

TestDomainModule

public class TestDomainModule : AbpModule
{
    public override void ConfigureServices(ServiceConfigurationContext context)
    {
        // 手動新增 DI 設定
        context.Services.AddTransient<ITestManager, OneManager>();
        context.Services.AddTransient<ITestManager, TwoManager>();
    }
}

TestDomainTests

[Fact]
public async Task Should_Get_Two_Results_From_ITestManager()
{
    var managers = GetRequiredService<IEnumerable<ITestManager>>();
    var results = managers.Select(manager => manager.GetString()).ToList();

    results.Count.ShouldBeGreaterThan(1);

    _testOutputHelper.WriteLine(string.Join(",",results));
}

重點

手動註冊每個實作到該介面
改取得 IEnumerable 該介面

參照

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13 October 2025