出问题的代码段

while(!pRst->rsEOF)

{

_variant_t vColumn,vValue;
  vColumn.SetString("Categorization");
  vValue.SetString(writeInfo.c_str());
  pRst->Update(vColumn,vValue);、//这里报错
  writeInfo="";
  belongAutomation=0;
  belongComputer=0;
  pRst->MoveNext();

}

错误类型：nhandled exception at 0x7c812afb in test.exe: Microsoft C++ exception: _com_error at memory location 0x0012f8f0..

转到文件：

inline HRESULT Recordset15::Update ( const _variant_t & Fields, const _variant_t & Values ) {
    HRESULT _hr = raw_Update(Fields, Values);
    if (FAILED(_hr)) _com_issue_errorex(_hr, this, __uuidof(this));
    return _hr;

数据库连接等语句

CoInitialize(NULL);
 _ConnectionPtr pConn(__uuidof(Connection));
 _RecordsetPtr pRst(__uuidof(Recordset));
 char * selectsql="select ArticleId,ClassifyNum,Categorization from Article where ArticleId between 1 and 10 order by ArticleId";
 pConn->ConnectionString="Provider=SQLOLEDB.1;Password=xxx;Persist Security Info=True; User ID=sa;Initial Catalog=ArticleCollection";
 pConn->Open("","","",adConnectUnspecified);
 pRst=pConn->Execute(selectsql,NULL,adCmdText);