Re: HELP NEEDED convert VARIANT to Double in SAFEARRAY

From:
ivaynsht@yahoo.com
Newsgroups:
microsoft.public.vc.atl
Date:
7 Aug 2006 16:55:03 -0700
Message-ID:
<1154994903.273965.289650@i42g2000cwa.googlegroups.com>
Egbert, thanks for response, but I guess you assume here that I send
array of doubles and want to convert it to array of Variant, the
situation is opposite I send array of variants and want to convert it
to double I did try the following:

short __stdcall Single_SafeArray(VARIANT *pv){
double* arr;
....
//Convert to safe_array of type double
    VARIANT pv1={0};
    pv1.vt=VT_ARRAY|VT_R8;
    lResult=SafeArrayCopy(pv->parray,&pv1.parray);

    //Assign to one-dimensional array of doubles
    lResult=SafeArrayLock(pv1.parray);
    arr=(double*)pv1.parray->pvData;
....
}
but it gives me the same result (each even index is junk)

i check that VARTYPE I get from Excel is 12 (Variant) and I have to
convert this to Double
thanks for the help

Ilya

That's rather simple.

Here the idea.

VARIANT v = {0};
v.vt = VT_ARRAY | VT_R8;
hr = SafeArrayCopy(sourceDoubleArray, &v.parray)

etc...

And if you have a non-double-safearray, you should loop throught its
elements and do what Brian suggests.

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