在做ocx 控件的时候,函数需要返回一个字符串类型的数组,代码如下:
VARIANT CreadDllCtrl::GetarcData(void) { AFX_MANAGE_STATE(AfxGetStaticModuleState()); VARIANT vaResult; VariantInit(&vaResult); SAFEARRAY * psa; SAFEARRAYBOUND rgsabound[1]; CComVariant cv; CComBSTR bstrTmp; long nIndex; rgsabound[0].lLbound = 0; rgsabound[0].cElements = dxfR.m_tarcData.size(); //psa = SafeArrayCreate(VT_BSTR, 1, rgsabound); psa = SafeArrayCreate(VT_VARIANT, 1, rgsabound); nIndex = 0; list<Tag_CADArc> ::iterator it; double pointx,pointy,pointz,r,stAngle,edAnge; CString strTmp; LONG nCount = 0; for( it= dxfR.m_tarcData.begin();it!=dxfR.m_tarcData.end();it++) { CString str; //cout<<*it<<" "; strTmp.Empty(); pointx = (*it).tCen.x; pointy = (*it).tCen.y; pointz = (*it).tCen.z; r = (*it).radius; stAngle = (*it).stAngle; edAnge = (*it).edAngle; str.Format(_T("%lf,"),pointx); strTmp = str; str.Format(_T("%lf,"),pointy); strTmp = strTmp + str; str.Format(_T("%lf,"),pointz); strTmp = strTmp + str; str.Format(_T("%lf,"),r); strTmp = strTmp + str; str.Format(_T("%lf,"),stAngle); strTmp = strTmp + str; str.Format(_T("%lf"),edAnge); strTmp = strTmp + str; bstrTmp = strTmp.AllocSysString(); cv = bstrTmp; //SafeArrayPutElement(psa, &nCount,bstrTmp); SafeArrayPutElement(psa, &nCount,&cv); nCount++; } //vaResult.vt = VT_ARRAY|VT_BSTR; vaResult.vt = VT_ARRAY|VT_VARIANT; vaResult.parray = psa; // TODO: Add your dispatch handler code here return vaResult; }
本来是用的上面标红的字体的代码,意思就是创建一个VARIANT 类型,这个类型是个BSTR类型的数组;但是在VBS 里面调用该函数的时候,使用变量接收返回的数组,总是
报,类型不匹配的错误。
最后发现,要创建的VARINAT 的数组类型应该是VT_ARRAY|VT_VARIANT ,也就是把VT_BSTR 换成VT_VARIANT ,再运行就正确了;
参考:
https://blog.csdn.net/Python/article/details/2568849?utm_medium=distribute.pc_relevant_bbs_down.none-task-blog-baidujs-2.nonecase&depth_1-utm_source=distribute.pc_relevant_bbs_down.none-task-blog-baidujs-2.nonecase
http://www.coder100.com/index/index/content/id/317915