- extern "C"{
- #include "sqlite3.h"
- };
- #pragma comment(lib,"sqlite.lib")
- /*
- 为什么要 extern “C” ?这是C++的基础。要在 C++里使用一段 C 的代码,必须要用 extern “C” 括起来。C++跟 C虽然语法上有重叠,但是它们是两个不同的东西,内存里的布局是完全不同的,在C++编译器里不用extern “C”括起C代码,会导致编译器不知道该如何为 C 代码描述内存布局。可能在 sqlite3.c 里人家已经把整段代码都 extern “C” 括起来了,但是你遇到一个.c 文件就自觉的再括一次,也没什么不好。
- */
- //-----------------------------------------------------OK,尽情的爽吧---------------------------------------------------//
- 下载是我简单作用sqlite3的代码,不好看,请包涵!
- 详细教程在这:http://download.csdn.net/detail/q775968375/5970059
- void CMySqliteDlg::OnBnClickedOk()
- {
- // TODO: 在此添加控件通知处理程序代码
- //CDialogEx::OnOK();
- CTime m_time;
- m_time=CTime::GetCurrentTime();//获取当前时间日期
- FILE *fp=fopen("debug.txt","a+");
- fprintf(fp," ------------------------%s------------------------ "
- ,m_time.Format(_T("%Y-%m-%d %H:%M:%S %A")));
- ::sqlite3 *db=NULL;
- ::sqlite3_stmt *stmt;
- char *sql=NULL,*error=NULL;
- const char *tail=NULL;
- int res;
- res=::sqlite3_open("MySqlite.db",&db);//打开数据库(不存在创建)
- if(res!=SQLITE_OK){
- ::sqlite3_close(db);
- fprintf(fp,"open database is failure:%s ",::sqlite3_errmsg(db));
- return;
- }else fprintf(fp,"open database is success! ");
- //create table
- sql="create table if not exists MyTable(Row integer primary key autoincrement,Content text)";
- res=::sqlite3_exec(db,sql,NULL,NULL,&error);
- if(res!=SQLITE_OK){
- ::sqlite3_close(db);
- fprintf(fp,"error create table:%s %s ",error,::sqlite3_errmsg(db));
- return;
- }else fprintf(fp,"table is created ");
- //insert
- sql="insert or replace into MyTable(Row,Content) values(?,?)";
- //sqlite3_prepare_v2的作用是将UTF-8格式的SQL语句转换为编译后的语句,并返回指向该语句的指针
- res=::sqlite3_prepare_v2(db,sql,-1,&stmt,&tail);
- if(res!=SQLITE_OK){
- ::sqlite3_close(db);
- fprintf(fp,"insert is failure:%s %s ",tail,::sqlite3_errmsg(db));
- return;
- }
- for(int i=0;i<3;i++){
- //::sqlite3_bind_int(stmt,1,0);//1:id 2:data
- ::sqlite3_bind_text(stmt,2,"数据库数据",-1,NULL);
- if(::sqlite3_step(stmt)!=SQLITE_DONE){
- fprintf(fp,"error update table:%s ",::sqlite3_errmsg(db));
- }
- ::sqlite3_reset(stmt); //重新初始化该sqlite3_stmt对象绑定的变量。
- }
- ::sqlite3_finalize(stmt);
- //delete
- sql="delete from MyTable where Row=2";
- //res=::sqlite3_prepare_v2(db,sql,-1,&stmt,&tail);
- res=::sqlite3_exec(db,sql,NULL,NULL,&error);
- if(res!=SQLITE_OK){
- ::sqlite3_close(db);
- fprintf(fp,"delete error:%s %s ",error,::sqlite3_errmsg(db));
- return;
- }else fprintf(fp,"delete is success ");
- ::sqlite3_finalize(stmt);
- //update
- sql="update MyTable set Content='修改后的数据' where Row=3";
- res=::sqlite3_exec(db,sql,NULL,NULL,&error);
- if(res!=SQLITE_OK){
- ::sqlite3_close(db);
- fprintf(fp,"update error:%s %s ",error,::sqlite3_errmsg(db));
- return;
- }else fprintf(fp,"update is success ");
- ::sqlite3_finalize(stmt);
- //query
- sql="select Row,Content from MyTable order by Row";
- res=::sqlite3_prepare_v2(db,sql,-1,&stmt,&tail);
- if(res!=SQLITE_OK){
- ::sqlite3_close(db);
- fprintf(fp,"query is failure:%s %s ",tail,::sqlite3_errmsg(db));
- return;
- }
- while(::sqlite3_step(stmt)==SQLITE_ROW){
- static int cnt=::sqlite3_column_count(stmt);
- for(int i=0;i<cnt;i++){
- fprintf(fp,"Data:%s ",::sqlite3_column_text(stmt,i));
- }
- /*
- int row=::sqlite3_column_int(stmt,0);
- char *rowData=(char*)::sqlite3_column_text(stmt,1);
- if(rowData==NULL)rowData="NULL";
- */
- }
- //释放statement
- ::sqlite3_finalize(stmt);
- //关闭数据库
- ::sqlite3_close(db);
- ::fclose(fp);
- }