94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
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Accessing SQL Server from C++
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#define DBNTWIN32
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#include <stdio.h>
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#include <windows.h>
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#include <sqlfront.h>
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#include <sqldb.h>
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// Forward declarations of the error handler and message handler.
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int err_handler(PDBPROCESS, INT, INT, INT, LPCSTR, LPCSTR);
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int msg_handler(PDBPROCESS, DBINT, INT, INT, LPCSTR, LPCSTR,
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LPCSTR, DBUSMALLINT);
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main()
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{
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PDBPROCESS dbproc; // The connection with SQL Server.
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PLOGINREC login; // The login information.
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DBCHAR name[100];
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DBCHAR city[100];
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// Install user-supplied error- and message-handling functions.
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dberrhandle (err_handler);
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dbmsghandle (msg_handler);
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// Initialize DB-Library.
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dbinit ();
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// Get a LOGINREC.
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login = dblogin ();
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DBSETLUSER (login, "my_login");
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DBSETLPWD (login, "my_password");
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DBSETLAPP (login, "example");
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// Get a DBPROCESS structure for communication with SQL Server.
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dbproc = dbopen (login, "my_server");
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// Retrieve some columns from the authors table in the
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// pubs database.
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// First, put the command into the command buffer.
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dbcmd (dbproc, "SELECT au_lname, city FROM pubs..authors");
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dbcmd (dbproc, " WHERE state = 'CA' ");
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// Send the command to SQL Server and start execution.
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dbsqlexec (dbproc);
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// Process the results.
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if (dbresults (dbproc) == SUCCEED)
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{
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// Bind column to program variables.
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dbbind (dbproc, 1, NTBSTRINGBIND, 0, name);
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dbbind (dbproc, 2, NTBSTRINGBIND, 0, city);
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// Retrieve and print the result rows.
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while (dbnextrow (dbproc) != NO_MORE_ROWS)
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{
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printf ("%s from %s\n", name, city);
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}
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}
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// Close the connection to SQL Server.
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dbexit ();
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return (0);
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}
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int err_handler (PDBPROCESS dbproc, INT severity,
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INT dberr, INT oserr, LPCSTR dberrstr, LPCSTR oserrstr)
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{
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printf ("DB-Library Error %i: %s\n", dberr, dberrstr);
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if (oserr != DBNOERR)
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{
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printf ("Operating System Error %i: %s\n", oserr, oserrstr);
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}
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return (INT_CANCEL);
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}
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int msg_handler (PDBPROCESS dbproc, DBINT msgno, INT msgstate,
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INT severity, LPCSTR msgtext, LPCSTR server,
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LPCSTR procedure, DBUSMALLINT line)
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{
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printf ("SQL Server Message %ld: %s\n", msgno, msgtext);
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return (0);
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}
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