教程：Visual Studio 连接 MySQL 数据库（包含常见错误及解决方法）

步骤①：

确保 VS2012 和 Mysql 软件能正常运行

VS2015/VS2010等其它版本应该都行，Mysql也是

步骤②：

添加<mysql.h>头文件到VS库

之后添加包含目录如下

一般的mysql都默认在C://program files里面，之后按照图中的路径选择mysql.h所在的文件夹即可，下同

步骤③：

添加库文件"libmysql.lib"

步骤④：

其实到这里就搞定了，不过还需要进行测试，新建cpp输入以下代码：

#include<winsock.h>
#include<iostream>
#include<string>
#include<mysql.h>
using namespace std;
#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "libmysql.lib")
//单步执行，不想单步执行就注释掉
//#define STEPBYSTEP
int main(void)
{
	cout<<"****************************************"<<endl;
#ifdef STEPBYSTEP
	system("pause");
#endif
	//必备的一个数据结构
	MYSQL mydata;
	//初始化数据库
	if(mysql_library_init(0, NULL, NULL)==0)
		cout<<"mysql_library_init() succeed"<<endl;
	else
	{
		cout<<"mysql_library_init() failed"<<endl;
		return -1;
	}
#ifdef STEPBYSTEP
	system("pause");
#endif
	//初始化数据结构
	if(mysql_init(&mydata)!=NULL)
		cout<<"mysql_init() succeed"<<endl;
	else
	{
		cout<<"mysql_init() failed"<<endl;
		return -1;
	}
#ifdef STEPBYSTEP
	system("pause");
#endif
	//在连接数据库之前，设置额外的连接选项
	//可以设置的选项很多，这里设置字符集，否则无法处理中文
	if(mysql_options(&mydata, MYSQL_SET_CHARSET_NAME, "gbk")==0)
		cout<<"mysql_options() succeed"<<endl;
	else
	{
		cout<<"mysql_options() failed"<<endl;
		return -1;
	}
#ifdef STEPBYSTEP
	system("pause");
#endif
	//连接数据库
	if(mysql_real_connect(&mydata, "localhost", "root", "chensijie", "sct", 3306, NULL, 0)!=NULL)	//这里的地址，用户名，密码，端口可以根据自己本地的情况更改
		cout<<"mysql_real_connect() succeed"<<endl;
	else
	{
		cout<<"mysql_real_connect() failed: "<<mysql_error(&mydata)<<endl;
		return -1;
	}
#ifdef STEPBYSTEP
	system("pause");
#endif
	//sql字符串
	string sqlstr;
	//创建一个表
	sqlstr = "CREATE TABLE IF NOT EXISTS user_info";
	sqlstr += "(";
	sqlstr +=  "user_id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT 'Unique User ID',";
	sqlstr += "user_name VARCHAR(100) CHARACTER SET gb2312 COLLATE gb2312_chinese_ci NULL COMMENT 'Name Of User',";
	sqlstr += "user_second_sum INT UNSIGNED NOT NULL DEFAULT 0 COMMENT 'The Summation Of Using Time'";
	sqlstr += ");";
	if(mysql_query(&mydata, sqlstr.c_str())==0)
		cout<<"mysql_query() create table succeed"<<endl;
	else
	{
		cout<<"mysql_query() create table failed"<<endl;
		mysql_close(&mydata);
		return -1;
	}
#ifdef STEPBYSTEP
	system("pause");
#endif
	//向表中插入数据
	sqlstr = "INSERT INTO user_info(user_name) VALUES('公司名称'),('一级部门'),('二级部门'),('开发小组'),('姓名');";
	if(mysql_query(&mydata, sqlstr.c_str())==0)
		cout<<"mysql_query() insert data succeed"<<endl;
	else
	{
		cout<<"mysql_query() insert data failed"<<endl;
		mysql_close(&mydata);
		return -1;
	}
#ifdef STEPBYSTEP
	system("pause");
#endif
	//显示刚才插入的数据
	sqlstr = "SELECT user_id,user_name,user_second_sum FROM user_info";
	MYSQL_RES *result = NULL;
	if(mysql_query(&mydata, sqlstr.c_str())==0)
	{
		cout<<"mysql_query() select data succeed"<<endl;
		//一次性取得数据集
		result = mysql_store_result(&mydata);
		//取得并打印行数
		int rowcount = mysql_num_rows(result);
		cout<<"row count: "<<rowcount<<endl;
		//取得并打印各字段的名称
		unsigned int fieldcount = mysql_num_fields(result);
		MYSQL_FIELD *field = NULL;
		for(unsigned int i=0;i<fieldcount;i++)
		{
			field = mysql_fetch_field_direct(result, i);
			cout<<field->name<<"\t\t";
		}
		cout<<endl;
		//打印各行
		MYSQL_ROW row = NULL;
		row = mysql_fetch_row(result);
		while(NULL!=row)
		{
			for(int i=0;i<fieldcount;i++)
				cout<<row[i]<<"\t\t";
			cout<<endl;
			row = mysql_fetch_row(result);
		}
	}
	else
	{
		cout<<"mysql_query() select data failed"<<endl;
		mysql_close(&mydata);
		return -1;
	}
#ifdef STEPBYSTEP
	system("pause");
#endif
	//删除刚才建的表
	sqlstr = "DROP TABLE user_info";
	if(mysql_query(&mydata, sqlstr.c_str())==0)
		cout<<"mysql_query() drop table succeed"<<endl;
	else
	{
		cout<<"mysql_query() drop table failed"<<endl;
		mysql_close(&mydata);
		return -1;
	}
	mysql_free_result(result);
	mysql_close(&mydata);
	mysql_server_end();
	//system("pause");
	return 0;
}