c# - 通过反射获取指针值

Question

我有一个 object 类型的实例，从中我知道它是一个指针(可以很容易地用 myobject.GetType().IsPointer 验证)。是否可以通过反射获取指针的值？

到目前为止的代码:

object obj = .... ; // type and value unknown at compile time
Type t = obj.GetType();

if (t.IsPointer)
{
    void* ptr = Pointer.Unbox(obj);

    // I can obtain its (the object's) bytes with:
    byte[] buffer = new byte[Marshal.SizeOf(t)];
    Marshal.Copy((IntPtr)ptr, buffer, 0, buffer.Length);

    // but how can I get the value represented by the byte array 'buffer'?
    // or how can I get the value of *ptr?
    // the following line obviously doesn't work:
    object val = (object)*ptr; // error CS0242 (obviously)
}

---

附录 №1: 由于所讨论的对象是值类型 -不是引用类型-，我不能使用 GCHandle::FromIntPtr(IntPtr)其次是 GCHandle::Target获取对象的值...

Answer 1

我想您需要的是 PtrToStructure。像这样:

if (t.IsPointer) {
    var ptr = Pointer.Unbox(obj);

    // The following line was edited by the OP ;)
    var underlyingType = t.GetElementType();
    var value = Marshal.PtrToStructure((IntPtr)ptr, underlyingType); 
}