C#中的显式构造函数调用

Question

因此,今天我使用ILSpy + dotPeek反映了一个使用ILSpy + dotPeek的仲裁.NET程序集,以便在我偶然发现这个奇怪的部分(虚拟示例)时更深入地了解IL代码的工作原理:

public class SomeBaseClass {
    public SomeBaseClass(SomeType[] iExpectACollection) {
        ...
    }
}

public class SomeDerivedClass {
    public SomeDerivedClass(SomeType onlyOneInstance) {
        SomeType[] collection;
        if(onlyOneInstance != null)
            collection = new SomeType[] { onlyOneInstance };
        base.\u002Ector(collection);
    }
}

据我所看到的,派生类不调用摆在首位的基础构造,而是做一些事onlyOneInstance,并随后调用是基构造.

我的问题是:在完成一些工作后,是否可以在C#中显式调用基础构造函数？或者这只能在IL中使用？我知道它很容易在Java中使用super(),但是我从未在.NET中看到它.

---

编辑

我刚和老板谈过,他可以发布一些真实的图书馆代码(这是我们公司的内部代码之一):

**IL PART**
.method public hidebysig specialname rtspecialname 
instance void .ctor (
    string contextId,
    class MyComp.NetStack.BufferManager bufferManager,
    class MyComp.NetStack.TcpChannelQuotas quotas,
    class [System]System.Security.Cryptography.X509Certificates.X509Certificate2 clientCertificate,
    class [System]System.Security.Cryptography.X509Certificates.X509Certificate2[] clientCertificateChain,
    class [System]System.Security.Cryptography.X509Certificates.X509Certificate2 serverCertificate,
    class MyComp.NetStack.EndpointDescription endpoint,
    class MyComp.NetStack.ApplicationThreadPool threadPool
) cil managed 
{
// Method begins at RVA 0x648e0
// Code size 263 (0x107)
.maxstack 10
.locals init (
    [0] class MyComp.NetStack.EndpointDescription[]
)

IL_0000: ldarg.0
IL_0001: ldarg.1
IL_0002: ldarg.2
IL_0003: ldarg.3
IL_0004: ldarg.s serverCertificate
IL_0006: ldarg.s clientCertificateChain
IL_0008: ldarg.s endpoint
IL_000a: brtrue.s IL_000f

IL_000c: ldnull
IL_000d: br.s IL_0021

IL_000f: ldc.i4.1
IL_0010: newarr MyComp.NetStack.EndpointDescription
IL_0015: stloc.0
IL_0016: ldloc.0
IL_0017: ldc.i4.0
IL_0018: ldarg.s endpoint
IL_001a: stelem.ref
IL_001b: ldloc.0
IL_001c: newobj instance void MyComp.NetStack.EndpointDescriptionCollection::.ctor(class [mscorlib]System.Collections.Generic.IEnumerable`1<class MyComp.NetStack.EndpointDescription>)

Answer 1

你可以这样做：

public class SomeDerivedClass : SomeBaseClass {
    public SomeDerivedClass(SomeType onlyOneInstance)
        : base(new[] { onlyOneInstance})

    {
    }
}

换句话说，您绝对可以在基本构造函数之前运行代码，作为构造传递给它的参数的一部分。在本例中，我们正在构造一个数组以传递给基类。您还可以调用静态方法，如递归提到的那样。

我错过了空检查。显然他们想要保留 null 传递情况而不是包含 null 的数组。这相当于：

public class SomeDerivedClass : SomeBaseClass {
    public SomeDerivedClass(SomeType onlyOneInstance)
        : base(onlyOneInstance != null ? new [] { onlyOneInstance} : null)

    {
    }
}