Vs how to read data in MySQL (by the way, the problem of Chinese garbled code is solved through code)

PS： I also read others' blogs , Then it took a long time , Feel troublesome to write this blog .

Catalog

One 、 stay vs Build a new project in , Then create a new source file

Two 、 Right click mysql_test project name , Then find the attribute at the bottom , And click the

3、 ... and 、 Click on VC++ Catalog , Add... To the include directory mysql File path , In general mysql The default installation path of is C Discoid Program Files Under the , find include route , Then click OK

Four 、 stay C/C++ General options in , Find the additional containing Directory , At the same time mysql Of include Include the path  

5、 ... and 、 Select the general options of the linker in the property page , Find the additional library directory inside , Then add mysql Of lib route

6、 ... and 、 In the input options of the linker , Find additional dependencies , Then write directly libmysql.lib

7、 ... and 、 Finally, mysql Of bin Directory , take libmysql.dll Make a copy to c:\windows\system32 Just go down the path .

8、 ... and 、 Just find a piece of code to test , Here is the code in others' blogs , Of course, some of them have been modified , Here will be the corresponding introduction .

Nine 、 If successful, the following prompt message box will be displayed

Ten 、 Print the results

One 、 stay vs Build a new project in , Then create a new source file

Two 、 Right click mysql_test project name , Then find the attribute at the bottom , And click the

3、 ... and 、 Click on VC++ Catalog , Add... To the include directory mysql File path , In general mysql The default installation path of is C Discoid Program Files Under the , find include route , Then click OK

Four 、 stay C/C++ General options in , Find the additional containing Directory , At the same time mysql Of include Include the path  

5、 ... and 、 Select the general options of the linker in the property page , Find the additional library directory inside , Then add mysql Of lib route

6、 ... and 、 In the input options of the linker , Find additional dependencies , Then write directly libmysql.lib

7、 ... and 、 Finally, mysql Of bin Directory , take libmysql.dll Make a copy to c:\windows\system32 Just go down the path .

8、 ... and 、 Just find a piece of code to test , Here is the code in others' blogs , Of course, some of them have been modified , Here will be the corresponding introduction .

mysql The test code is as follows ：

create database test;

use test;

create table test_1(name varchar(128),age int);

insert into test_1 values(' Pinot orange ',18);

vs The test code is as follows （ Pay attention to the modification mysql The user name and password are your own , As well as database And the name of the table inside , My user name here is root, The password is 123456,database It's the top mysql Test the test, Table name is test_1）：

#include <stdio.h>
#include <WinSock.h>
#include <Windows.h>
#include <mysql.h>
#include<iostream>
using namespace std;

MYSQL mysql;  //mysql Connect 
MYSQL_RES* res; // A result aggregation construct    
MYSQL_ROW row; //char**  Two dimensional array , Keep records   

const char DataBase_UserName[] = "root";    // Database user name username
const char DataBase_Password[] = "123456";   // Database password , Fill in your own password 
const char DataBase_Host[] = "localhost";  // Database connection address 
// Note that sometimes the host is used ip Will report a mistake , Now you can put ip Change it to localhost
const char DataBase_Name[] = "test";  //database name
unsigned int DataBase_Port = 3306;            //server port

bool ConnectDatabase(); // Function declaration 
void FreeConnect();   // Release resources 

wchar_t* Utf8_2_Unicode(char* row_i)
{
	int len = MultiByteToWideChar(CP_UTF8, 0, row_i, strlen(row_i), NULL, 0);
	wchar_t* wszStr = new wchar_t[len + 1];
	MultiByteToWideChar(CP_UTF8, 0, row_i, strlen(row_i), wszStr, len);
	wszStr[len] = '\0';
	return wszStr;
}

void main()
{
	setlocale(LC_ALL, "chs");
	ConnectDatabase();	// Connect to database 
	// Query data 
	mysql_query(&mysql, "SELECT * from test_1");
	// Get the result set 
	res = mysql_store_result(&mysql);
	// Display the data 
	// to ROW assignment , Judge ROW Is it empty , Print data if it is not empty .
	while (row = mysql_fetch_row(res))
	{
		wchar_t* m1 = Utf8_2_Unicode(row[0]);
		wchar_t* m2 = Utf8_2_Unicode(row[1]);
		wprintf_s(L"%s  %s", m1,m2);
	}
	FreeConnect();
	getchar();
}


bool ConnectDatabase()
{
	// initialization mysql
	mysql_init(&mysql);   // Connect mysql, database 
	// In the middle are the hosts , user name , password , Database name , Port number （ You can write the default 0 perhaps 3306 etc. ）, You can write parameters first and then pass them in 
	if (!(mysql_real_connect(&mysql, DataBase_Host, DataBase_UserName, DataBase_Password, DataBase_Name, DataBase_Port, NULL, 0))) {
		printf("Error connecting to database:%s\n", mysql_error(&mysql));
		return false;
	}
	else {
		MessageBoxA(NULL, " Connect MYSQL Data are successfully ！", " news ", MB_OK);
		printf("Connected...\n");
		return true;
	}
}
// Release resources 
void FreeConnect() {
	mysql_close(&mysql);
}

Nine 、 If successful, the following prompt message box will be displayed

Ten 、 Print the results （ Successful show ）