Question

当我尝试编译我的代码时，我收到此错误：

1＆gt; Main.obj：错误LNK2019：未解析的外部符号“__declspec（dllimport）public：class std :: basic_string，class std :: allocator＆gt; const＆amp; __cdecl sql :: SQLException :: getSQLState（void）const “__imp_？getSQLState @ SQLException @sql @@ QBAABV？$ basic_string @ DU？$ char_traits @ D @ std @@ V？$ allocator @ D @ 2 @@ std @@ XZ）在函数__catch $ 57778中引用

现在还有一些，但我认为解决这个问题，也会解决其他问题。

我正在尝试从WinCe 6.0设备到服务器的SQL连接。初步想法：我是否需要将.dll / .lib文件导入我的WinCe设备？

这是我的代码：

include <windows.h>
include <ScanCApi.h>
include <iostream>
include <cppconn/driver.h>
include <cppconn/exception.h>
include <cppconn/resultset.h>
include <cppconn/statement.h>
include <stdlib.h>

int wmain() {
    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", "root");
        /* Connect to the MySQL test database */
        con->setSchema("test");

        stmt = con->createStatement();
        res = stmt->executeQuery("SELECT 'Hello World!' AS _message");
        while (res->next()) {
            std::cout << "\t... MySQL replies: ";
            /* Access column data by alias or column name */
            std::cout << res->getString("_message") << std::endl;
            std::cout << "\t... MySQL says it again: ";
            /* Access column data by numeric offset, 1 is the first column */
            std::cout << res->getString(1) << std::endl;
        }
        delete res;
        delete stmt;
        delete con;
    } catch (sql::SQLException &e) {
        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;
    }
    return 0;
}

VS错误LNK2019，MySQL代码调用__declspec（dllimport）错误

0 个答案: