下面的代码讲述了如何使用ODBC API的SQLBrowseConnect函数建立同数据源的连接。
#define BRWS_LEN 100SQLHENV
henv;SQLHDBC hdbc;
SQLHSTMT hstmt;
SQLRETURN retcode;
SQLCHAR szConnStrIn[BRWS_LEN], szConnStrOut[BRWS_LEN];
SQLSMALLINT cbConnStrOut;/* Allocate the environment handle. */
retcode = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Set the version environment attribute. */
retcode = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, SQL_OV_ODBC3, 0);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Allocate the connection handle. */
retcode = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Call SQLBrowseConnect until it returns a value other than */
/* SQL_NEED_DATA (pass the data source name the first time). */
/* If SQL_NEED_DATA is returned, call GetUserInput (not */
/* shown) to build a dialog from the values in szConnStrOut. */
/* The user-supplied values are returned in szConnStrIn, */
/* which is passed in the next call to SQLBrowseConnect. */
lstrcpy(szConnStrIn, "DSN=Sales"); do {
retcode = SQLBrowseConnect(hdbc, szConnStrIn, SQL_NTS,
szConnStrOut, BRWS_LEN, &cbConnStrOut);
if (retcode == SQL_NEED_DATA)
GetUserInput(szConnStrOut, szConnStrIn);
} while (retcode == SQL_NEED_DATA);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO){
/* Allocate the statement handle. */
retcode = SQLAllocHandle(SQL_HANDLE_STMT, hdbc, &hstmt);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Process data after successful connection */ ...;
SQLFreeHandle(SQL_HANDLE_STMT, hstmt); }
SQLDisconnect(hdbc); } }
SQLFreeHandle(SQL_HANDLE_DBC, hdbc); }}
SQLFreeHandle(SQL_HANDLE_ENV, henv);
#define BRWS_LEN 100SQLHENV
henv;SQLHDBC hdbc;
SQLHSTMT hstmt;
SQLRETURN retcode;
SQLCHAR szConnStrIn[BRWS_LEN], szConnStrOut[BRWS_LEN];
SQLSMALLINT cbConnStrOut;/* Allocate the environment handle. */
retcode = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Set the version environment attribute. */
retcode = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, SQL_OV_ODBC3, 0);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Allocate the connection handle. */
retcode = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Call SQLBrowseConnect until it returns a value other than */
/* SQL_NEED_DATA (pass the data source name the first time). */
/* If SQL_NEED_DATA is returned, call GetUserInput (not */
/* shown) to build a dialog from the values in szConnStrOut. */
/* The user-supplied values are returned in szConnStrIn, */
/* which is passed in the next call to SQLBrowseConnect. */
lstrcpy(szConnStrIn, "DSN=Sales"); do {
retcode = SQLBrowseConnect(hdbc, szConnStrIn, SQL_NTS,
szConnStrOut, BRWS_LEN, &cbConnStrOut);
if (retcode == SQL_NEED_DATA)
GetUserInput(szConnStrOut, szConnStrIn);
} while (retcode == SQL_NEED_DATA);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO){
/* Allocate the statement handle. */
retcode = SQLAllocHandle(SQL_HANDLE_STMT, hdbc, &hstmt);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Process data after successful connection */ ...;
SQLFreeHandle(SQL_HANDLE_STMT, hstmt); }
SQLDisconnect(hdbc); } }
SQLFreeHandle(SQL_HANDLE_DBC, hdbc); }}
SQLFreeHandle(SQL_HANDLE_ENV, henv);
#define BRWS_LEN 100SQLHENV
henv;SQLHDBC hdbc;
SQLHSTMT hstmt;
SQLRETURN retcode;
SQLCHAR szConnStrIn[BRWS_LEN], szConnStrOut[BRWS_LEN];
SQLSMALLINT cbConnStrOut;/* Allocate the environment handle. */
retcode = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Set the version environment attribute. */
retcode = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, SQL_OV_ODBC3, 0);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Allocate the connection handle. */
retcode = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Call SQLBrowseConnect until it returns a value other than */
/* SQL_NEED_DATA (pass the data source name the first time). */
/* If SQL_NEED_DATA is returned, call GetUserInput (not */
/* shown) to build a dialog from the values in szConnStrOut. */
/* The user-supplied values are returned in szConnStrIn, */
/* which is passed in the next call to SQLBrowseConnect. */
lstrcpy(szConnStrIn, "DSN=Sales"); do {
retcode = SQLBrowseConnect(hdbc, szConnStrIn, SQL_NTS,
szConnStrOut, BRWS_LEN, &cbConnStrOut);
if (retcode == SQL_NEED_DATA)
GetUserInput(szConnStrOut, szConnStrIn);
} while (retcode == SQL_NEED_DATA);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO){
/* Allocate the statement handle. */
retcode = SQLAllocHandle(SQL_HANDLE_STMT, hdbc, &hstmt);
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
/* Process data after successful connection */ ...;
SQLFreeHandle(SQL_HANDLE_STMT, hstmt); }
SQLDisconnect(hdbc); } }
SQLFreeHandle(SQL_HANDLE_DBC, hdbc); }}
SQLFreeHandle(SQL_HANDLE_ENV, henv);