SAFEARRAY如何转换？

[pkzl888]

如何将SAFEARRAY转换为char[]，以及如何将unsigned char[] 转换为SAFEARRAY.请无比帮忙！感激不尽！

[shudingbo]

先SAFEARRAY中获取元素，再添进char中
如，下例中，Parames.parray 为 SAFEARRAY。
把它的元素，付给pReturn

你自己看看代码。
___________________

STDMETHODIMP CUnRealDraw::GetProData(int iProType, VARIANT Parames, VARIANT *pReturn)
{
// Get the parames

HRESULT hr=S_OK;
long lStartBound =0;
long lEndBound = 2;

hr = SafeArrayGetLBound(Parames.parray, 1, &lStartBound);
hr = SafeArrayGetUBound(Parames.parray, 1, &lEndBound);

SAFEARRAYBOUND safeBound[1];
SAFEARRAY* pOutArray;
safeBound[0].cElements = lEndBound-lStartBound+1;
safeBound[0].lLbound = 0;
pOutArray = SafeArrayCreate(VT_VARIANT,1,safeBound);


for(long iIndex = lStartBound; iIndex <= lEndBound; iIndex ++)
{

VARIANT varFlavor;
VariantInit(&varFlavor);

hr = SafeArrayGetElement(Parames.parray,&iIndex, &varFlavor);
if(hr != S_OK)
{
tt="error,can't find the value";
}
if(varFlavor.vt == VT_I4 )
{
long lsz = varFlavor.lVal;
}
if(varFlavor.vt == VT_BSTR )
{
_bstr_t bstrOut(varFlavor.bstrVal);
CComVariant variantFlavor(SysAllocString(varFlavor.bstrVal));
SafeArrayPutElement(pOutArray,&iIndex,&variantFlavor);

tt= bstrOut;
}

}//for loop

//......
//.......
//return the VARIANT
V_VT(pReturn)=VT_ARRAY | VT_VARIANT;
V_ARRAY(pReturn) = pOutArray;

return S_OK;
}

[warmchang]

嗯，Lava_sdb(大波)的讲解够详细，呵呵，我就不说什么了。

[LeeZi]

查看MSDN吧，MSDN是最好的老师。

[ldsjlzy]

SAFEARRAYBOUND Bound;
SAFEARRAY varValue;
long lIndex;
CString strValue;

Bound.cElements = 32;
Bound.lLbound = 0;

varValue.Clear();
varValue.vt = VT_ARRAY | VT_BSTR;
varValue.pArray = SafeArrayCreate(VT_BSTR, 1, &Bound);

for(int i = 0; i < 32; i++)
{
_bstr_ b = strValue[i].AllocSysString;
SafeArrayPutElement (varValue[i].parray, <emp, b.copy());
SysFreeString(b);
}

VariantClear(&varValue);