描述:
求一个vc控件返回数组给asp程序的例子
希望能用 ATL ACTIVE SERVER PAGE CLASS 写一个 控件 传递一个数组给asp
让asp通过方法 读取出来
解决方案1:
// VC
HRESULT isqtl([in] VARIANT x, [in] VARIANT y, [out, retval] VARIANT* out);
isqtl(VARIANT x, VARIANT y, VARIANT *out)
{
if (out == NULL)
return E_POINTER;
if (x.vt != (VT_VARIANT | VT_BYREF))
return E_INVALIDARG;
if (!(x.pvarVal->vt & VT_ARRAY))
return E_INVALIDARG;
if (y.vt != (VT_VARIANT | VT_BYREF))
return E_INVALIDARG;
if (!(y.pvarVal->vt & VT_ARRAY))
return E_INVALIDARG;
SAFEARRAY* pX = NULL;
SAFEARRAY* pY = NULL;
if (x.pvarVal->vt & VT_BYREF)
pX = *(x.pvarVal->pparray);
else
pX = x.pvarVal->parray;
if (y.pvarVal->vt & VT_BYREF)
pY = *(y.pvarVal->pparray);
else
pY = y.pvarVal->parray;
if (::SafeArrayGetDim(pX) != 1)
return E_INVALIDARG;
if (::SafeArrayGetDim(pY) != 1)
return E_INVALIDARG;
LONG LBound, UBound;
::SafeArrayGetLBound(pX, 1, &LBound);
::SafeArrayGetUBound(pX, 1, &UBound);
LONG Count = UBound - LBound + 1;
::SafeArrayGetLBound(pY, 1, &LBound);
::SafeArrayGetUBound(pY, 1, &UBound);
if ((UBound - LBound + 1) != Count)
return E_INVALIDARG;
vector<DOUBLE> vx;
vector<DOUBLE> vy;
_variant_t v;
VARIANT* pvData = NULL;
::SafeArrayAccessData(pX, (void**)&pvData);
for (LONG i=0; i<Count; ++i)
{
v = pvData[i];
v.ChangeType(VT_R8);
vx.push_back(v.dblVal);
}
::SafeArrayUnaccessData(pX);
::SafeArrayAccessData(pY, (void**)&pvData);
for (i=0; i<Count; ++i)
{
v = pvData[i];
v.ChangeType(VT_R8);
vy.push_back(v.dblVal);
}
::SafeArrayUnaccessData(pY);
v.Clear();
v.vt = VT_VARIANT | VT_ARRAY;
v.parray = ::SafeArrayCreateVector(VT_VARIANT, 0, 8);
VARIANT* pd = NULL;
::SafeArrayAccessData(v.parray, (void**)&pd);
pd[0] = _variant_t(vx[0]).Detach();
pd[1] = _variant_t(vx[1]).Detach();
pd[2] = _variant_t(vy[0]).Detach();
pd[3] = _variant_t(vy[1]).Detach();
pd[4] = _variant_t(vy[2]).Detach();
pd[5] = _variant_t(vy[0]).Detach();
pd[6] = _variant_t(vy[1]).Detach();
pd[7] = _variant_t(vy[2]).Detach();
::SafeArrayUnaccessData(v.parray);
*out = v.Detach();
return S_OK;
}
//我直接取X的前两个，重复取Y的前三位返回,具体的自己写吧。
//应该还有错误处理，我省了。
========================================================================
//asp
Dim obj
set obj = CraeteObject(...)
Dim a(4)
For I = 0 To 4
a(I) = I + 1
Next
Dim b(4)
For I = 0 TO 4
b(I) = I * I
Next
dim Sum
Sum = obj.isqtl(a, b)
if (IsArray(sum)) Then
for j = LBound(sum) To UBound(sum)
Response.Write CStr(sum(j)) & "<BR>"
Next
End if
HRESULT GetArray(VARIANT* pVal)
{
LONG Count;
_variant_t v;
v.vt = VT_VARIANT | VT_ARRAY;
v.parrsy = ::SafeArrayCreateVector(VT_VARIANT, 0, Count);
//填写数据
//...
*pVal = v.Detach();
return S_OK;
}