使用Generic Type創建動態結構

Question

我是.net和C＃的新手，我正在嘗試創建一個MyStruct實例，而不知道之前的Type。 所以我的類在構造函數中收到3個類型，我需要用這種類型創建一個MyStruct實例。 我在互聯網上看到了最后一部分，但我無法編譯。

namespace IQUnionTag
{
    public class IQUnionTag
    {
        private struct MyStruct<A, B, C>
        {
            public A value1;
            public B value2;
            public C value3;
        }
        private object MyStructure;
        private Type a;
        private Type b;
        private Type c;
        public IQUnionTag(Type a, Type b, Type c)
        {
            this.a = a;
            this.b = b;
            this.c = c;
            int d = 2;
            var d1 = typeof (MyStruct<>); // Doesn't compile
            Type[] typeArgs = { a, b, c };
            var makeme = d1.MakeGenericType(typeArgs);
            object o = Activator.CreateInstance(makeme);
            Console.WriteLine(o);
        }
    }
}

我只想要類似的東西

Mystructure = new MyStruct<a,b,c> // this doesn't compile too

typeof（MyStruct <>）使錯誤編譯如下

Erreur Using the generic type 'IQUnionTag.IQUnionTag.MyStruct<A,B,C>' requires 3 type arguments

我當然錯過了什么，你能幫我創建我的實例嗎？

Answer 1

目前尚不清楚您的目的是什么，但您可以這樣做：

public class IQUnionTag
{
    private struct MyStruct<A, B, C>
    {
        public A value1;
        public B value2;
        public C value3;
    }

    private object MyStructure;
    private Type a;
    private Type b;
    private Type c;
    public IQUnionTag(Type a, Type b, Type c)
    {
        this.a = a;
        this.b = b;
        this.c = c;
        int d = 2;
        var d1 = typeof(MyStruct<,,>); // this is the way to get type of MyStruct
        Type[] typeArgs = { a, b, c };
        var makeme = d1.MakeGenericType(typeArgs);
        object o = Activator.CreateInstance(makeme);
        Console.WriteLine(o);
    }
}