No Idea? No hint?
In a "simple" C like manner (without using objects and without operators overloading) you can not concatenate strings with "+". So string data = "foo="+foo; will not result in what you expected. use strcat() or some similar function for that
fx_maddin:
No Idea? No hint?
No Idea? No hint?
I don't got any error while compiling. I'm, not sure if the data is availble inside the dll. How can I clarify, if this code works:
stringfoo ="bar";
SetString(foo);
![MQL5 - Language of trade strategies built-in the MetaTrader 5 client terminal](https://c.mql5.com/i/registerlandings/logo-2.png)
You are missing trading opportunities:
- Free trading apps
- Over 8,000 signals for copying
- Economic news for exploring financial markets
Registration
Log in
You agree to website policy and terms of use
If you do not have an account, please register
Hi,
i try to send a string from mql to dll and work with them...
Code in MQL:
bool SetString(string foo);
#import//+-------------------------------------------------------+int start() {
string foo = "bar";
SetString(foo);
}[/CODE]
Code in DLL (taken from http://www.codeproject.com/Articles/66625/A-Fully-Featured-Windows-HTTP-Wrapper-in-C)
[CODE]bool SetString(string foo) {
// Set URL.
WinHttpClient client(L"http://myurl.de/script.php");
// Set post data.
string data = "foo="+foo;
client.SetAdditionalDataToSend((BYTE *)data.c_str(), data.size());
// Set request headers.
wchar_t szSize[50] = L"";
swprintf_s(szSize, L"%d", data.size());
wstring headers = L"Content-Length: ";
headers += szSize;
headers += L"\r\nContent-Type: application/x-www-form-urlencoded\r\n";
client.SetAdditionalRequestHeaders(headers);
// Send HTTP post request.
client.SendHttpRequest(L"POST");
wstring httpResponseHeader = client.GetResponseHeader();
wstring httpResponseContent = client.GetResponseContent();
}Now, I use Wireshark to monitor my HTTP Traffic and the DLL send onlyhttp://myurl.de/script.php?foo=without the variable.
What's wrong in the code. I tried several ways to transfer the string to DLL...