oci 连接 oracle但用OCIDefineByPos取出结果是乱码，其它获得字段名，字段长度都很正确！！部分代码如下:
 case SQLT_CHR: case SQLT_AFC:
                {
                        pCurrField->Type = STRING_TYPE;
                        pCurrField->Size = InnerDataSize;
                        pCurrField->DataBuf = new ub1[pCurrField->Size+1];
                        ErrorNo = OCIDefineByPos(hStmt, &(pCurrField->Dfn), hErr, k,
                                pCurrField->DataBuf, pCurrField->Size+1, SQLT_STR,
                                (dvoid*)pCurrField->DataIndicator, (ub2*)0, (ub2*)0, OCI_DEFAULT);
                        checkError(); 
                        //ub2 csid = OCI_UCS2ID;
                        //ub2 csid = OCI_UTF16ID;
                        //ErrorNo = OCIAttrSet((dvoid *)(pCurrField->Dfn),OCI_HTYPE_DEFINE, (dvoid *)&csid,0,OCI_ATTR_CHARSET_ID,hErr);
                        break;
在 DATABUF中都到的值是乱码！！不知为何!!xiexie !!

1 pCurrField->DataBuf = new ub1[pCurrField->Size+1]; 
  后面应加上：
     memset(pCurrField->DataBuf, 0x00, pCurrField->Size+1);

2 获取数据的函数返回值是否成功？
  如果没有成功说明是初始new时的乱码，
  成功了说明字符集不相同，导致显示乱码。