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AppBuilder中进行直接ODBC API数据库调用访问的基本方法!(5) 字符串 TEXT
日期 DATETIME
是/否 BIT
货币 CURRENCY
系统自动编号 COUNTER
五、 对列的操作：
1、 取得SQL语句中的列数：
int SuperRecordSet::GetColCount()
{
SWORD swColCount;
if (m_hstmt == NULL)
return -1;
if (SQL_SUCCESS == ::SQLNumResultCols(m_hstmt,&swColCount))
return swColCount;
else
return -1;
}
七、数据的读取
1、列绑定：
CString strSQLString;
RETCODE ReturnCode;
SQLHSTMT hstmt;
if (SQL_SUCCESS != SQLAllocHandle(SQL_HANDLE_STMT,theApp.m_hdbc,&hstmt))
return;
FF_DB_HHZHICHU_SET_FIELDS dbdata;
SDWORD cb1;
SDWORD cb2;
SDWORD cb3;
SDWORD cb4;
SDWORD cb5;
SDWORD cb6;
SDWORD cb7;
SDWORD cb8;
SDWORD cb9;
// Build the SQL Statement
strSQLString.Format(
"SELECT "
"NID,"
"ARIQI,"
"NJINE,"
"ASHUOMING,"
"ALAIYUAN,"
"ACUNZHE,"
"AYONGTU,"
"AXIAOFEI,"
"ABEIZHU"
" FROM HHZhiChu "
" WHERE NID=%u",
nID);
if (SQL_SUCCESS == (ReturnCode = SQLExecDirect(hstmt,(UCHAR*)((LPCTSTR)strSQLString),SQL_NTS)))
{
SQLBindCol(hstmt,1,SQL_C_SLONG,&dbdata.m_Nid,0,&cb1);
SQLBindCol(hstmt,2,SQL_C_TIMESTAMP,&dbdata.m_Ariqi,0,&cb2);
SQLBindCol(hstmt,3,SQL_C_DOUBLE,&dbdata.m_Njine,0,&cb3);
SQLBindCol(hstmt,4,SQL_C_CHAR,dbdata.m_Ashuoming,HHZhiChu_aShuoMing_SIZE,&cb4);
SQLBindCol(hstmt,5,SQL_C_CHAR,dbdata.m_Alaiyuan,HHZhiChu_aLaiYuan_SIZE,&cb5);
SQLBindCol(hstmt,6,SQL_C_CHAR,dbdata.m_Acunzhe,HHZhiChu_aCunZhe_SIZE,&cb6);
SQLBindCol(hstmt,7,SQL_C_CHAR,dbdata.m_Ayongtu,HHZhiChu_aYongTu_SIZE,&cb7);
SQLBindCol(hstmt,8,SQL_C_CHAR,dbdata.m_Axiaofei,HHZhiChu_aXiaoFei_SIZE,&cb8);
SQLBindCol(hstmt,9,SQL_C_CHAR,dbdata.m_Abeizhu,HHZhiChu_aBeiZhu_SIZE,&cb9);
// Fetch and store...
if (SQL_SUCCESS == (ReturnCode = SQLFetch(hstmt)))
{
m_Record.m_Nid = dbdata.m_Nid;
m_Record.m_Ariqi.SetDateTime(dbdata.m_Ariqi.year,
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