Я знаю, что могу подключиться к своей базе данных, потому что я могу делать операторы запросов в Visual Studio, но я не могу подключиться из своего приложения C ++. Это продолжается в случае SQL_ERROR.
Код:
//Capstone main driver
#include <iostream>
#include <windows.h>
#include <sqlext.h>
#include <sqltypes.h>
#include <sql.h>
using namespace std;
//const int MAX_CHAR = 1024;
int main() {
#define SQL_RESULT_LEN 240
#define SQL_RETURN_CODE_LEN 3000
//define handles and variables
SQLHANDLE sqlConnHandle;
SQLHANDLE sqlStmtHandle;
SQLHANDLE sqlEnvHandle;
SQLWCHAR retconstring[SQL_RETURN_CODE_LEN];
//initializations
sqlConnHandle = NULL;
sqlStmtHandle = NULL;
//allocations
if (SQL_SUCCESS != SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &sqlEnvHandle)) {
goto COMPLETED;
}
if (SQL_SUCCESS != SQLSetEnvAttr(sqlEnvHandle, SQL_ATTR_ODBC_VERSION, (SQLPOINTER)SQL_OV_ODBC3, 0)) {
goto COMPLETED;
}
if (SQL_SUCCESS != SQLAllocHandle(SQL_HANDLE_DBC, sqlEnvHandle, &sqlConnHandle)) {
goto COMPLETED;
}
//output
cout << "Attempting connection to SQL Server..." << endl;
//connect to SQL Server
//I am using a trusted connection and port 14808
//it does not matter if you are using default or named instance
//just make sure you define the server name and the port
//You have the option to use a username/password instead of a trusted connection
//but is more secure to use a trusted connection
switch (SQLDriverConnect(sqlConnHandle,
NULL,
(SQLWCHAR*)L"Driver={ODBC Driver 13 for SQL Server};Server=tcp:myserver,1433;Database=CapstoneDB;Uid=CapstoneAdmin;Pwd=mypassword;Encrypt=yes;TrustServerCertificate=no;Connection Timeout=30;",
SQL_NTS,
retconstring,
1024,
NULL,
SQL_DRIVER_NOPROMPT)) {
case SQL_SUCCESS:
cout << "Successfully connected to SQL Server";
cout << "\n";
break;
case SQL_SUCCESS_WITH_INFO:
cout << "Successfully connected to SQL Server";
cout << "\n";
break;
case SQL_INVALID_HANDLE:
cout << "Could not connect to SQL Server: Invalid Handle";
cout << "\n";
goto COMPLETED;
case SQL_ERROR:
cout << "Could not connect to SQL Server: Error";
cout << "\n";
goto COMPLETED;
default:
break;
}
//if there is a problem connecting then exit application
if (SQL_SUCCESS != SQLAllocHandle(SQL_HANDLE_STMT, sqlConnHandle, &sqlStmtHandle)) {
goto COMPLETED;
}
//output
cout << endl << "Executing T-SQL query..." << endl;
//if there is a problem executing the query then exit application
//else display query result
if (SQL_SUCCESS != SQLExecDirect(sqlStmtHandle, (SQLWCHAR*)L"SELECT @@VERSION", SQL_NTS)) {
cout << "Error querying SQL Server";
cout << "\n";
goto COMPLETED;
}
else {
//declare output variable and pointer
SQLCHAR sqlVersion[SQL_RESULT_LEN];
SQLINTEGER ptrSqlVersion;
while (SQLFetch(sqlStmtHandle) == SQL_SUCCESS) {
SQLGetData(sqlStmtHandle, 1, SQL_CHAR, sqlVersion, SQL_RESULT_LEN, &ptrSqlVersion);
//display query result
cout << "\nQuery Result:\n\n";
cout << sqlVersion << endl;
}
}
//close connection and free resources
COMPLETED:
SQLFreeHandle(SQL_HANDLE_STMT, sqlStmtHandle);
SQLDisconnect(sqlConnHandle);
SQLFreeHandle(SQL_HANDLE_DBC, sqlConnHandle);
SQLFreeHandle(SQL_HANDLE_ENV, sqlEnvHandle);
return 0;
}
Я использую приведенный выше код, но с моим адресом сервера и паролем в строке подключения.