EXAMPLE2.C
资源名称:MSDN_VC98.zip [点击查看]
上传用户:bangxh
上传日期:2007-01-31
资源大小:42235k
文件大小:5k
源码类别:
Windows编程
开发平台:
Visual C++
- /* example2.c */
- /*
- ** This example opens a data file, inserts data from the file
- ** into a newly created table containing several of the
- ** SQL Server datatypes, and binds and prints the results.
- ** You must have a file named datafile and CREATE DATABASE
- ** permission in your login database. Also you must have enough room
- ** in your default device to create a new database (minimum 2Mb).
- */
- #if defined(DBNTWIN32)
- #include <windows.h>
- #endif
- #include <stdio.h>
- #include <sqlfront.h>
- #include <sqldb.h>
- #define BUFLEN 2048
- #define HEXLEN 510
- #define PLEN 25
- #define SALESLEN 11
- /* Forward declarations of the error handler and message handler functions.
- */
- int err_handler(DBPROCESS*, int, int, int, char*, char*);
- int msg_handler(DBPROCESS*, DBINT, int, int, char*);
- main(argc,argv)
- int argc;
- char *argv[];
- {
- LOGINREC *login;
- DBPROCESS *dbproc;
- RETCODE return_code;
- DBTINYINT age;
- DBSMALLINT userid;
- DBINT royalty;
- DBCHAR name[PLEN+1];
- DBBINARY title_id[PLEN+1];
- DBBIT us_citizen;
- DBFLT8 account;
- DBCHAR title[PLEN+1]; /* string */
- DBCHAR manager[PLEN+1]; /* ntbstring */
- DBCHAR id_buffer[HEXLEN+1];
- DBCHAR sales_buffer[SALESLEN+1];
- DBDECIMAL sales;
- static char cmdbuf[BUFLEN];
- FILE *infile;
- dbinit(); /* initialize dblib */
- /* Install the user-supplied error-handling and message-handling
- * functions. They are defined at the bottom of this source file.
- */
- dbmsghandle((DBMSGHANDLE_PROC)msg_handler);
- dberrhandle((DBERRHANDLE_PROC)err_handler);
- /* Allocate and initialize the LOGINREC structure to be used
- * to open a connection to SQL Server.
- */
- login = dblogin();
- DBSETLUSER(login, "user");
- DBSETLPWD(login, "my_passwd");
- DBSETLAPP(login, "example2");
- DBSETLVERSION(login, DBVER60);
- dbproc = dbopen(login, "my_server");
- printf("Creating the 'test' database.n");
- dbcmd(dbproc,"create database test ");
- dbsqlexec(dbproc);
- dbresults(dbproc);
- dbuse(dbproc,"test");
- printf("Creating the 'alltypes' table.n");
- /* Create a table that contains several SQL Server datatypes. */
- dbcmd(dbproc,"create table alltypes ");
- dbcmd(dbproc,"(age tinyint,");
- dbcmd(dbproc,"userid smallint,");
- dbcmd(dbproc,"royalty int,");
- dbcmd(dbproc,"name char(25),");
- dbcmd(dbproc,"title_id varbinary(20),");
- dbcmd(dbproc,"us_citizen bit,");
- dbcmd(dbproc,"account float,");
- dbcmd(dbproc,"title varchar(20),");
- dbcmd(dbproc,"manager char(25),");
- dbcmd(dbproc,"sales decimal(10,2))");
- dbsqlexec(dbproc);
- dbresults(dbproc);
- /* Insert rows of data into the newly created table "alltypes".
- * We will read in the contents of the file and form an
- * INSERT statement.
- */
- if ((infile=fopen("datafile","r")) == NULL)
- {
- printf("Unable to open file 'datafile'.n");
- return(STDEXIT);
- }
- printf("Inserting rows into the 'alltypes' table.n");
- while ((fgets(cmdbuf,BUFLEN,infile)) != NULL)
- {
- dbfcmd(dbproc,"insert into alltypes n");
- dbfcmd(dbproc,"values(%s) n",cmdbuf);
- }
- dbsqlexec(dbproc);
- /* Process the results of each of the INSERT statements. */
- while ((return_code = dbresults(dbproc)) != NO_MORE_RESULTS)
- {
- if (return_code == FAIL)
- printf("One of the insert statements failed.n");
- }
- printf("Selecting rows from the 'alltypes' table:n");
- dbcmd(dbproc,"select * from alltypes");
- dbsqlexec(dbproc);
- /* Initialize the DBDECIMAL structure so binding and conversions will use defaults */
- sales.precision = 0;
- sales.scale = 0;
- while ((return_code = dbresults(dbproc)) != NO_MORE_RESULTS)
- {
- if (return_code == SUCCEED)
- {
- dbbind(dbproc,1,TINYBIND, (DBINT) 0,(BYTE *) &age);
- dbbind(dbproc,2,SMALLBIND, (DBINT) 0,(BYTE *) &userid);
- dbbind(dbproc,3,INTBIND, (DBINT) 0,(BYTE *) &royalty);
- dbbind(dbproc,4,CHARBIND, (DBINT) 0,name);
- dbbind(dbproc,5,BINARYBIND, (DBINT) 0,title_id);
- dbbind(dbproc,6,BITBIND, (DBINT) 0,(BYTE *) &us_citizen);
- dbbind(dbproc,7,FLT8BIND, (DBINT) 0,(BYTE *) &account);
- dbbind(dbproc,8,STRINGBIND, (DBINT) 0,title);
- dbbind(dbproc,9,NTBSTRINGBIND, (DBINT) 0,manager);
- dbbind(dbproc,10,DECIMALBIND, (DBINT) 0, (BYTE *)&sales);
- /*
- ** Initialize null terminator in "name" array,
- ** since CHARBIND does not add one.
- */
- name[PLEN] = ' ';
- while (dbnextrow(dbproc) != NO_MORE_ROWS)
- {
- dbconvert (dbproc, SQLBINARY, title_id, dbdatlen(dbproc, 5), SQLCHAR, id_buffer, (DBINT)-1);
- dbconvert (dbproc, SQLDECIMAL, (BYTE *)&sales, sizeof(DBDECIMAL), SQLCHAR, sales_buffer, (DBINT)-1);
- printf
- ("%d %d %ld %s 0x%sn",
- age, userid, royalty, name, id_buffer);
- printf
- ("%d %8.2f %s %s %sn",
- us_citizen, account, title, manager, sales_buffer);
- }
- }
- }
- dbexit();
- return(STDEXIT);
- }
- int err_handler(dbproc, severity, dberr, oserr, dberrstr, oserrstr)
- DBPROCESS *dbproc;
- int severity;
- int dberr;
- int oserr;
- char *dberrstr;
- char *oserrstr;
- {
- printf("DB-LIBRARY error:nt%sn", dberrstr);
- if (oserr != DBNOERR)
- printf("Operating-system error:nt%sn", oserrstr);
- if ((dbproc == NULL) || (DBDEAD(dbproc)))
- return(INT_EXIT);
- return(INT_CANCEL);
- }
- int msg_handler(dbproc, msgno, msgstate, severity, msgtext)
- DBPROCESS *dbproc;
- DBINT msgno;
- int msgstate;
- int severity;
- char *msgtext;
- {
- printf
- ("SQL Server message %ld, state %d, severity %d:nt%sn",
- msgno, msgstate, severity, msgtext);
- return(0);
- }