OTL sqlite
我用的是 :OTL 4.0,Example 277 (Simple Insert/Select/Update) #include <iostream>
using namespace std;
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define OTL_ODBC // Compile OTL 4.0/ODBC
#define ODBCVER 0x0250 // ODBC Version # needs to be downgraded
// to 2.5 because the SQLite ODBC driver seems
// to run slower when ODBC 3.x functions
// used (performance is not as good as with
// ODBC 2.5 function calls)
// #define OTL_ODBC_UNIX // uncomment this line if UnixODBC is used
#include <otlv4.h> // include the OTL 4.0 header file
otl_connect db; // connect object
void insert()
// insert rows into table
{
otl_stream
o(50,// stream buffer size
"insert into test_tab values(:f1<int>,:f2<char[31]>)",// SQL statement
db // connect object
);
char tmp[32];
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
o<<i<<tmp;
}
}
void update(const int af1)
// insert rows into table
{
otl_stream
o(1,// buffer size
"UPDATE test_tab "
" SET f2=:f2<char[31]> "
" WHERE f1=:f1<int>",// UPDATE statement
db // connect object
);
o<<"Name changed"<<af1;
o<<otl_null()<<af1+1; // set f2 to NULL
// there is no need to flush the stream buffer here
// because the buffer size is 1: the stream flushes
// the buffer every time the buffer gets full
}
void select(const int af1)
{
otl_stream i(50,// buffer size may be > 1
"select * from test_tab "
"where f1>=:f11<int> "
" and f1<=:f12<int>*2",// SELECT statement
db // connect object
);
// create select stream
int f1;
char f2[31];
i<<af1<<af1; // Writing input values into the stream
while(!i.eof()){ // while not end-of-data
i>>f1;
cout<<"f1="<<f1<<",f2=";
i>>f2;
if(i.is_null())
cout<<"NULL";
else
cout<<f2;
cout<<endl;
}
}
int main()
{
otl_connect::otl_initialize(); // initialize ODBC environment
try{
db.rlogon("scott/tiger@sqlite");
otl_cursor::direct_exec
(
db,"drop table test_tab",otl_exception::disabled // disable OTL exceptions
); // drop table
otl_cursor::direct_exec
(
db,"create table test_tab(f1 int,f2 varchar(30))"
); // create table
insert(); // insert records into the table
update(10); // update records in the table
select(8); // select records from the table
}
catch(otl_exception& p){ // intercept OTL exceptions
cerr<<p.msg<<endl; // print out error message
cerr<<p.stm_text<<endl; // print out SQL that caused the error
cerr<<p.sqlstate<<endl; // print out SQLSTATE message
cerr<<p.var_info<<endl; // print out the variable that caused the error
}
db.logoff(); // disconnect from the database
getchar();//Add_By_LY
return 0;
}
新建控制台项目,添加otlv4.h。 db.rlogon("scott/tiger@sqlite"); //user/pwd@dsn
为: db.rlogon("DSN=SQLite3");
或者(sqlite并不需要用户名和密码访问): db.rlogon("UID=scott;PWD=tiger;DSN=SQLite");
运行成功: 但怎样在win32模式下运行呢?如果有人知道请告知,非常感谢。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |