的MySQL在连接功能
问题描述:
我有64位,下载了32,但崩溃(这是因为没有与LIB文件的错误少,所以我不得不使用32,但) 所做的一切都是在这里:http://dev.mysql.com/doc/refman/5.6/en/connector-cpp-apps-windows-visual-studio.html#connector-cpp-application-build-dynamic的MySQL在连接功能
但该计划在“connect'function崩溃:
http://imageshack.us/photo/my-images/827/25478716.jpg/
任何想法,该怎么办? 这里是我想编译的源代码。
#include <stdlib.h>
#include <iostream>
#include <Windows.h>
/*
Include directly the different
headers from cppconn/ and mysql_driver.h + mysql_util.h
(and mysql_connection.h). This will reduce your build time!
*/
//__declspec(dllexport)
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
using namespace std;
int main(void)
{
cout << endl;
cout << "Running 'SELECT 'Hello World!' » AS _message'..." << endl;
try {
sql::Driver *driver;
sql::Connection *con;
sql::Statement *stmt;
sql::ResultSet *res;
/* Create a connection */
driver = get_driver_instance();
con = driver->connect("tcp://127.0.0.1:3306", "root", "pass");//
/* Connect to the MySQL test database */
con->setSchema("test");
stmt = con->createStatement();
res = stmt->executeQuery("SELECT 'Hello World!' AS _message");
while (res->next()) {
cout << "\t... MySQL replies: ";
/* Access column data by alias or column name */
cout << res->getString("_message") << endl;
cout << "\t... MySQL says it again: ";
/* Access column fata by numeric offset, 1 is the first column */
cout << res->getString(1) << endl;
}
delete res;
delete stmt;
delete con;
} catch (sql::SQLException &e) {
cout << "# ERR: SQLException in " << __FILE__;
cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << endl;
cout << "# ERR: " << e.what();
cout << " (MySQL error code: " << e.getErrorCode();
cout << ", SQLState: " << e.getSQLState() << ")" << endl;
}
cout << endl;
return EXIT_SUCCESS;
}
答
您可以尝试构建不同的方式连接:
#include <mysql.h>
#include <stdio.h>
#include <stdlib.h>
// just going to input the general details and not the port numbers
struct connection_details
{
char *server;
char *user;
char *password;
char *database;
};
MYSQL* mysql_connection_setup(struct connection_details mysql_details)
{
// first of all create a mysql instance and initialize the variables within
MYSQL *connection = mysql_init(NULL);
// connect to the database with the details attached.
if (!mysql_real_connect(connection,mysql_details.server, mysql_details.user, mysql_details.password, mysql_details.database, 0, NULL, 0)) {
printf("Conection error : %s\n", mysql_error(connection));
exit(1);
}
return connection;
}
MYSQL_RES* mysql_perform_query(MYSQL *connection, char *sql_query)
{
// send the query to the database
if (mysql_query(connection, sql_query))
{
printf("MySQL query error : %s\n", mysql_error(connection));
exit(1);
}
return mysql_use_result(connection);
}
int main()
{
MYSQL *conn; // the connection
MYSQL_RES *res; // the results
MYSQL_ROW row; // the results row (line by line)
struct connection_details mysqlD;
mysqlD.server = "localhost"; // where the mysql database is
mysqlD.user = "mysqlusername"; // the root user of mysql
mysqlD.password = "mysqlpassword"; // the password of the root user in mysql
mysqlD.database = "mysql"; // the databse to pick
// connect to the mysql database
conn = mysql_connection_setup(mysqlD);
// assign the results return to the MYSQL_RES pointer
res = mysql_perform_query(conn, "show tables");
printf("MySQL Tables in mysql database:\n");
while ((row = mysql_fetch_row(res)) !=NULL)
printf("%s\n", row[0]);
/* clean up the database result set */
mysql_free_result(res);
/* clean up the database link */
mysql_close(conn);
return 0;
}
see here完整的例子
dopn't您指定的连接字符串? – 4pie0 2013-03-20 00:40:18
奇怪,但在VS 2008的工作..我可以使它在这VS12工作? – user2080060 2013-03-20 00:43:55