Can I initialize array in constructor of array?

Question

Normally, I write the these code follow instructions:

COleSafeArray array;
DWORD numElements[] = { row};   //
array.Create(mytype, 1, numElements);

then to make easily, I create wrap class inherit COleSafeArray, my code like this:

myclass::myclass(int Rows)
    : COleSafeArray()
{
   DWORD numElements[] = { row };   //
   Create(mytype, 1, numElements);
}

Let's say I have an Object, from this Object I have 1D array,
so my code now like this:

myclass::myclass(Object* obj)  
    : COleSafeArray()
{
   DWORD numElements[] = { row };   //
   Create(mytype, 1, numElements);
   //From obj -> get 1D array then use PutElement method to fill this base
   //..
   PutElement(index, str); <<-- error
}

but, I get this error:
Microsoft C++ exception: COleException at memory location 0x0000006A353FE5D8
Can I create an array by only constructor?
How to make this code works: myclass arr(obj);

Thanks you!

Answer 1

This test case worked without any problems for me whether or not the class derived from COleSafeArray loaded the SAFEARRAY in the constructor or in a subsequent function call after construction.

class Object {
public:
    Object() = default;
    ~Object() = default;

    CString* getArray()
    {
        return m_arr;
    }

    int getElements()
    {
        return ARRAYSIZE(m_arr);
    }

    CString m_arr[5]{ L"one", L"two", L"three", L"four", L"five" };
};

class CWrapOle : public COleSafeArray
{
public:
    CWrapOle(Object* obj, bool bLoad) : m_bLoad(bLoad)
    {
        DWORD dwElements = obj->getElements();
        Create(VT_BSTR, 1, &dwElements);
        if (bLoad)
        {
            long ndx[1]{};
            CString* pArray = obj->getArray();
            for (DWORD i = 0; i < dwElements; i++)
            {
                ndx[0] = i;
                PutElement(ndx, CComBSTR(pArray[i]));
            }
        }
    }

    void LoadArray(Object* obj)
    {
        if (!m_bLoad)
        {
            long lBound{MAXLONG}, uBound{MAXLONG};
            DWORD dwElements = obj->getElements();
            GetLBound(1, &lBound);
            GetUBound(1, &uBound);
            ASSERT(dwElements == uBound - lBound + 1);
            long ndx[1]{};
            CString* pArray = obj->getArray();
            for (DWORD i = 0; i < dwElements; i++)
            {
                ndx[0] = i;
                PutElement(ndx, CComBSTR(pArray[i]));
            }
        }
    }

private:
    bool m_bLoad{ false };
};

If you want to load the array in the derived class constructor pass "true", otherwase pass "false".