视频1 视频21 视频41 视频61 视频文章1 视频文章21 视频文章41 视频文章61 推荐1 推荐3 推荐5 推荐7 推荐9 推荐11 推荐13 推荐15 推荐17 推荐19 推荐21 推荐23 推荐25 推荐27 推荐29 推荐31 推荐33 推荐35 推荐37 推荐39 推荐41 推荐43 推荐45 推荐47 推荐49 关键词1 关键词101 关键词201 关键词301 关键词401 关键词501 关键词601 关键词701 关键词801 关键词901 关键词1001 关键词1101 关键词1201 关键词1301 关键词1401 关键词1501 关键词1601 关键词1701 关键词1801 关键词1901 视频扩展1 视频扩展6 视频扩展11 视频扩展16 文章1 文章201 文章401 文章601 文章801 文章1001 资讯1 资讯501 资讯1001 资讯1501 标签1 标签501 标签1001 关键词1 关键词501 关键词1001 关键词1501 专题2001
mysqlcAPI访问数据库_MySQL
2020-11-09 18:08:43 责编:小采
文档

bitsCN.com

#include

#include "CMySQL.h"

#include "stdio.h"

#define MYSQL_PORT 3306

void process_result_set(MYSQL mysql, MYSQL_RES *result);

void exit(MYSQL mydata,char *ep);

int main(int argc, char * argv[]) {

MYSQL mydata;

Database_Param p;

char queryName[600];

MYSQL_RES *result=NULL;

int status =0;

//初始化

strcpy(p.host,"127.0.0.1");

strcpy(p.user,"root");

strcpy(p.password,"root");

strcpy(p.db,"im");

p.port = MYSQL_PORT;

//初始化数据结构

if(mysql_init(&mydata) == NULL)

{

printf("init mysql data stauct fail/n");

system("pause");

return -1;

}

//连接数据库

if(argc == 1)

{

if(NULL == mysql_real_connect(&mydata,p.host,p.user,p.password,

p.db,p.port,NULL,CLIENT_MULTI_STATEMENTS))

{

printf("connect database fail,%s/n",mysql_error(&mydata));

system("pause");

return -1;

}

}

else

{

printf("run parameter error/n");

system("pause");

return -1;

}

//首先设置字符集

strcpy(queryName,"set names gbkd");

if(mysql_query(&mydata,"set names gbk")!=0)

{

exit(mydata,"set names fail");

return -1;

}

//查询数据(支持单个字段和多个字段,输出排版)

strcpy(queryName,"show databases");

if(mysql_query(&mydata,queryName) != 0)

{

exit(mydata,"execute sql syntax fail");

return -1;

}

//取得查询结果

result= mysql_store_result(&mydata);

process_result_set(mydata,result);

//处理多条插入语句,在mysql_real_connect(......)函数里的最后一个参数更改为:CLIENT_MULTI_STATEMENTS

strcpy(queryName,"insert into fangl.admin(username,password) values('fangl1','fangl1'),('fangl2','fangl2'),('fangl3','fangl3');/

insert into fangl.admin(username,password) values('fl1','fl1'),('fl2','fl2'),('fl3','fl3');/

insert into fangl.admin(username,password) values('fal1','fal1'),('fal2','fal2'),('fal3','fal3');/

select * from fangl.admin");

if(mysql_query(&mydata,queryName)!=0)

{

exit(mydata,"insert values fail");

return -1;

}

do {

/* did current statement return data? */

result = mysql_store_result(&mydata);

if (result)

{

/* yes; process rows and free the result set */

process_result_set(mydata, result);

mysql_free_result(result);

}

else /* no result set or error */

{

if (mysql_field_count(&mydata) == 0)

{

printf("%lld rows affected/n",

mysql_affected_rows(&mydata));

}

else /* some error occurred */

{

printf("Could not retrieve result set/n");

break;

}

}

/* more results? -1 = no, >0 = error, 0 = yes (keep looping) */

if ((status = mysql_next_result(&mydata)) > 0)

printf("Could not execute statement/n");

} while (status == 0);

//删除表中的数据

strcpy(queryName,"delete from fangl.admin where username='fl1'");

if(mysql_query(&mydata,queryName) != 0)

{

exit(mydata,"execute sql syntax fail");

return -1;

}

//查询数据(支持单个字段和多个字段,输出排版)

strcpy(queryName,"select * from fangl.admin");

if(mysql_query(&mydata,queryName) != 0)

{

return -1;

}

//取得查询结果

result= mysql_store_result(&mydata);

process_result_set(mydata,result);

//释放结果

if(result != NULL)

{

mysql_free_result(result);

}

mysql_close(&mydata);

system("pause");

return 1;

}

void process_result_set(MYSQL mydata, MYSQL_RES *result)

{

int rowcount = mysql_num_rows(result); //查询结果有多少行

//取得各字段名

MYSQL_FIELD *fields = NULL;

for(int i=0;fields=mysql_fetch_field(result);i++)

{

printf("%s ",fields->name);

}

printf("/n");

//依次读取各条记录

MYSQL_ROW currow = NULL;

while((currow = mysql_fetch_row(result)) != NULL)

{

for(int i = 0; i < mysql_num_fields(result); ++i)

{

printf("%s ",currow[i]?currow[i]:"NULL");

}

printf("/n");

}

}

void exit(MYSQL mydata,char *ep)

{

mysql_close(&mydata);

printf("%s,%s/n",ep,mysql_error(&mydata));

system("pause");

}

以上是在vs 2008下编译并验证无误的,若有问题大家一起讨论,哈

本文出自 “lynn” 博客

bitsCN.com

下载本文
显示全文
专题