errorC2668:“ATL::CStringT<BaseType,StringTraits>::CStringT”:对重载函数的调用不明确
描述:
#include "stdafx.h"
#include "MyProject.h"
#include "RxRecordset.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
RxRecordset::RxRecordset()
{
}
RxRecordset::~RxRecordset()
{
}
CString RxRecordset::GetFieldValue(CString Field)
{
CString sValue;
_variant_t value;
value=rst->GetCollect((_bstr_t)Field);
if(value.vt==VT_EMPTY ||value.vt==VT_NULL)
sValue="";
else
{
sValue=(char*)(_bstr_t)value;
sValue.TrimRight();
sValue.TrimLeft();
}
return sValue;
}
bool RxRecordset::Open(CString srecordset, UINT adCmd)
{
if(adCmd==adCmdTable)
sRecordset=srecordset;
else
sRecordset="("+srecordset+") DERIVEDTBL";
try{
rst=cnn->Execute((_bstr_t)srecordset,NULL,adCmd);
}
catch(_com_error&e)
{
this->GetErrors(e);
return false;
}
return true;
}
int RxRecordset::GetRecordCount()
{
int nCount=0;
try{
rst->MoveFirst();
}
catch(...)
{
return 0;
}
if(rst->_EOF)
return 0;
while (!rst->_EOF)
{
rst->MoveNext();
nCount=nCount+1;
}
rst->MoveFirst();
return nCount;
}
bool RxRecordset::MoveFirst()
{
try{
rst->MoveFirst();
}
catch(_com_error&e)
{
this->GetErrors(e);
return false;
}
return true;
}
bool RxRecordset::MoveNext()
{
try{
rst->MoveNext();
}
catch(_com_error&e)
{
this->GetErrors(e);
return false;
}
return true;
}
bool RxRecordset::MoveLast()
{
try{
rst->MoveLast();
}
catch(_com_error&e)
{
this->GetErrors(e);
return false;
}
return true;
}
bool RxRecordset::MovePrevious()
{
try{
rst->MovePrevious();
}
catch(_com_error&e)
{
this->GetErrors(e);
return false;
}
return true;
}
bool RxRecordset::Move(int nRecordNumber)
{
try{
rst->MoveFirst();
rst->Move(nRecordNumber);
}
catch(_com_error&e)
{
this->GetErrors(e);
return false;
}
return true;
}
int RxRecordset::GetFieldCount()
{
int count;
try{
count=rst->GetFields()->GetCount();
}
catch(...)
{
return -1;
}
return count;
}
_RecordsetPtr RxRecordset::GetRecordset()
{
return rst;
}
void RxRecordset::GetErrors(_com_error eErrors)
{
CString string;
CFile file;
// file.Open("Error.Rxe",CFile::modeWrite|CFile::modeNoTruncate);
ErrorsPtr pErrors=cnn->GetErrors();
if (pErrors->GetCount()==0)
{
string=(char*)(_bstr_t)eErrors.ErrorMessage();
// file.Write(string+"\r\n",string.GetLength()+1);
//::AfxMessageBox(string);
}
else
{
for (int i=0;i<pErrors->GetCount();i++)
{
_bstr_t desc=pErrors->GetItem((long)i)->GetDescription();
string=(char*)desc;
// file.Write(string+"\r\n",string.GetLength()+1);
//::AfxMessageBox(string);
}
}
// file.Close();
}
void RxRecordset::Close()
{
rst->Close();
}
CString RxRecordset::GetFieldName(int nNumber)
{
CString sName;
_variant_t vName;
try{
vName=rst->GetFields()->GetItem((long)nNumber)->GetName();
}
catch(_com_error&e)
{
GetErrors(e);
return "";
}
if(vName.vt==VT_EMPTY)
return "";
sName=(char*)(_bstr_t)vName;
sName.TrimLeft();
sName.TrimRight();
return sName;
}
CString RxRecordset::GetSQL()
{
return sRecordset;
}
CString RxRecordset::GetFieldType(int nNumber=0)
{
ADODB::DataTypeEnum type;
CString sType;
try{
rst->GetFields()->GetItem((long)nNumber)->get_Type(&type);
}
catch(_com_error &e)
{
RxRecordset::GetErrors(e);
return adError; }
ADODB::DataTypeEnum tp[]={adBinary,adBoolean,adCurrency,adBigInt,adDecimal,adDouble,adInteger,adLongVarBinary,adNumeric,adSingle,adSmallInt,adTinyInt,adUnsignedBigInt,adUnsignedInt,adUnsignedSmallInt,adUnsignedTinyInt,adVarBinary,adBSTR,adChar,adLongVarChar,adLongVarWChar,adVarChar,adVarWChar,adWChar,adDate,adDBDate,adDBTime,adDBTimeStamp};
for(int i=0;i<28;i++)
{
if(type==tp[i])
break;
if(i==27)
return "未知类型";
if(i<2)
sType="逻辑型";
if(i>=2&& i<18)
sType="数值型";
if(i>=18 && i<25)
sType="字符型";
if(i>=25 && i<29)
sType="日期型";
}
return sType;
}
bool RxRecordset::IsNull(int nIndex)
{
long Attrib=rst->GetFields()->GetItem((long)nIndex)->Attributes;
if(Attrib&adFldIsNullable)
return false;
else
return true;
}
错误指向标记行，望大侠们帮帮小弟啊
解决方案1:
你想把DataTypeEnum中的实际数值返回？
catch(_com_error &e)
{
RxRecordset::GetErrors(e);
CString strMsg;
strMsg.Format("%d",(int)adError);
return strMsg;
}