MySQL C++ Connector 在 ResultSet->getString() 上使我的应用程序崩溃

可能又是我在问c++新手问题

我有很大的头痛使该死的(对不起的语言)MySQL c++连接器工作。我不知道这是写得不好还是怎么的，但就我的经验而言，我从来没有遇到过这么多的麻烦。

无论如何，我得到它连接和抛出异常失败的连接/查询，这对我来说是相当大的事情:U: p。实际的问题来自于我获取查询的结果。无论我做什么，我的应用程序总是崩溃:S

我使用32位安装程序和libmysql.dll/lib从32位MySQL服务器(因为我正在编译一个32位应用程序，我认为这是正确的事情)

这里有一些代码你可以想象我在说什么

DBManager.h

#ifndef DBMANAGER_H
#define DBMANAGER_H
#define CPPCONN_PUBLIC_FUNC
#define CPPCONN_LIB_BUILD True
#include <string>
#include "mysql_connection.h"
#include "mysql_driver.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
#include <cppconn/prepared_statement.h>
class DBManager
{
public:
    static DBManager* Instance();
    bool Query(const char* Query);
    void Connect(const char* DbHost, unsigned short DbPort, const char* DbUser, const char* DbPass, const char* DbName);
    bool ValidCredentials(const char* Username, const char* Password);
    void ManageException(sql::SQLException &e);
    ~DBManager();
protected:
    static DBManager* pInstance;
private:
    DBManager() {};
    DBManager(DBManager const&){};
    DBManager& operator=(DBManager const&){};
    sql::mysql::MySQL_Driver* driver;
    sql::Connection *Con;
    sql::PreparedStatement *pstmt;
    sql::ResultSet *res;
    sql::Statement *stmt;
    bool isConnected;
};
#endif

#include "DBManager.h"
DBManager* DBManager::pInstance = NULL;
DBManager* DBManager::Instance()
{
    if (!pInstance)
    {
        pInstance = new DBManager();
    }
    return pInstance;
}
bool DBManager::Query(const char* Query)
{
    return true;
}
DBManager::~DBManager()
{   
    delete Con;
    delete pstmt;
    delete res;
    delete stmt;
}
void DBManager::ManageException(sql::SQLException& e)
{
    if (e.getErrorCode() != 0) {
        std::cout << "# ERR: SQLException in " << __FILE__;
        std::cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << std::endl;
        std::cout << "# ERR: " << e.what();
        std::cout << " (MySQL error code: " << e.getErrorCode();
        std::cout << ", SQLState: " << e.getSQLState() << " )" << std::endl;
    }
}
void DBManager::Connect(const char* DbHost, unsigned short DbPort, const char* DbUser, const char* DbPass, const char* DbName)
{
    try {
        driver = sql::mysql::get_mysql_driver_instance();
        std::string connDSN = "tcp://" + std::string(DbHost) + ":3306";
        Con = driver->connect(connDSN, sql::SQLString(DbUser), sql::SQLString(DbPass));
        Con->setSchema(sql::SQLString(DbName));
        isConnected = true;
        std::cout<<"Database connection successul."<<std::endl;
    } catch(sql::SQLException &e) {
        ManageException(e);
        isConnected = false;
        return;
    }
}
bool DBManager::ValidCredentials(const char* Username, const char* Password)
{
    bool cred = false;
    try {
        pstmt = Con->prepareStatement("SELECT * FROM account WHERE account_name=? LIMIT 1"); // Smart use of indexing
        pstmt->setString(1, Username);
        res = pstmt->executeQuery();
        while(res->next())
        {
            if (res->getString("password") == Password)
            {
                cred = true;
            }
        }
    }
    catch(sql::SQLException &e) {
        ManageException(e);
        return false;
    }
    return cred;
}

基本上，它编译没有问题，连接没有问题，执行查询没有问题，但第二个我试图检索数据，一些断点异常在文件"xutils.cpp"中抛出。我真的不知道我做错了什么。我在编译调试时使用DEBUG库。嗯，libmysql.dll应该发布，因为我从服务器包中提取了它，但我似乎没有找到它作为编译我自己的源代码。

我真的不知道为什么它会这样崩溃和燃烧:/

PS:不要介意密码的无散列，这对我来说真的只是一个概念的证明……让它先工作，然后保护它:U

PS:我也有Boost库编译和准备在项目中，如果这有帮助:U

EDIT: Main function

bool ServerRunning = true;
int main(int argc, char** argv)
{
    #ifdef _WIN32
        std::string title = TEXT("Window Title Change");
        SetConsoleTitle(title.c_str());
    #endif;
    std::cout<<"Loading Configuration File..."<<std::endl<<std::endl;
    std::string path = boost::filesystem::path(boost::filesystem::current_path()).string();
    path += "\Config.ini";
    INIParser* Config = new INIParser(path.c_str()); //MinINI
    // Sockets data
    std::string listenIP = Config->GetString("Network", "ListenIP", "127.0.0.1");
    unsigned short listenPort = Config->GetInt("Network", "ListenPort", 5000);
    // Database data
    std::string dbHost = Config->GetString("Database", "Host", "localhost");
    std::string dbUser = Config->GetString("Database", "User", "root");
    std::string dbPass = Config->GetString("Database", "Password", "");
    std::string dbName = Config->GetString("Database", "Database", "authserv");
    unsigned short dbPort = Config->GetInt("Database", "Post", 1000);
    // General settings
    int sessionTimeout = Config->GetInt("Settings", "SessionTimeout", 10);
    int maxClients = Config->GetInt("Settings", "MaxClients", 10);
    int serverTimeout = Config->GetInt("Settings", "GameserverTimeout", 1);
     // Begin Initialization
     DBManager::Instance()->Connect(dbHost.c_str(), dbPort, dbUser.c_str(), dbPass.c_str(), dbName.c_str());
     bool loginSuccess = DBManager::Instance()->ValidCredentials("Username", "Password");
    char c;
    while (ServerRunning)
    {
        std::cin>>c;
        if (c == 'q')
        {
            ServerRunning = false;
        }
    }
    return 0;
}