我有一个在互联网上找到的使用功能GetRawInputDeviceInfo的代码，但没有正确获得设备的名称。有时根本没有名字。我一直在寻找答案，发现人们在Windows XP和Windows 7上遇到此问题。我正在使用Windows 10，因此对我没有太大帮助。
C++ - WinAPI get list of all connected USB devices（我需要发布代码本身吗？是堆栈溢出的新消息）
最后，我要做的是获取连接到PC的所有设备的名称并打印出来，但是此功能也不会返回鼠标的名称，因此，如果有人提出建议，有关如何解决该问题的方法，或者一种更好的方法来获得自己喜欢的名字，以听听您的想法。在此先感谢-shon：）
EDIT2！完整代码：
#include <windows.h>
#include <iostream>
#include <vector>
#include <string>
#include <set>
// Namespace
using namespace std;
// Main
int main()
{
// Program
cout << "USB Device Lister." << endl;
// Get Number Of Devices
UINT nDevices = 0;
GetRawInputDeviceList(NULL, &nDevices, sizeof(RAWINPUTDEVICELIST));
// Got Any?
if (nDevices < 1)
{
// Exit
cout << "ERR: 0 Devices?";
cin.get();
return 0;
}
// Allocate Memory For Device List
PRAWINPUTDEVICELIST pRawInputDeviceList;
pRawInputDeviceList = new RAWINPUTDEVICELIST[sizeof(RAWINPUTDEVICELIST) * nDevices];
// Got Memory?
if (pRawInputDeviceList == NULL)
{
// Error
cout << "ERR: Could not allocate memory for Device List.";
cin.get();
return 0;
}
// Fill Device List Buffer
int nResult;
nResult = GetRawInputDeviceList(pRawInputDeviceList, &nDevices, sizeof(RAWINPUTDEVICELIST));
// Got Device List?
if (nResult < 0)
{
// Clean Up
delete[] pRawInputDeviceList;
// Error
cout << "ERR: Could not get device list.";
cin.get();
return 0;
}
std::set<std::string> DeviceList;
// Loop Through Device List
for (UINT i = 0; i < nDevices; i++)
{
// Get Character Count For Device Name
UINT nBufferSize = 0;
nResult = GetRawInputDeviceInfo(pRawInputDeviceList[i].hDevice, // Device
RIDI_DEVICENAME, // Get Device Name
NULL, // NO Buff, Want Count!
&nBufferSize); // Char Count Here!
// Got Device Name?
if (nResult < 0)
{
// Error
cout << "ERR: Unable to get Device Name character count.. Moving to next device." << endl << endl;
// Next
continue;
}
// Allocate Memory For Device Name
WCHAR* wcDeviceName = new WCHAR[nBufferSize + 1];
// Got Memory
if (wcDeviceName == NULL)
{
// Error
cout << "ERR: Unable to allocate memory for Device Name.. Moving to next device." << endl << endl;
// Next
continue;
}
// Get Name
nResult = GetRawInputDeviceInfo(pRawInputDeviceList[i].hDevice, // Device
RIDI_DEVICENAME, // Get Device Name
wcDeviceName, // Get Name!
&nBufferSize); // Char Count
// Got Device Name?
if (nResult < 0)
{
// Error
cout << "ERR: Unable to get Device Name.. Moving to next device." << endl << endl;
// Clean Up
delete[] wcDeviceName;
// Next
continue;
}
// Set Device Info & Buffer Size
RID_DEVICE_INFO rdiDeviceInfo;
rdiDeviceInfo.cbSize = sizeof(RID_DEVICE_INFO);
nBufferSize = rdiDeviceInfo.cbSize;
// Get Device Info
nResult = GetRawInputDeviceInfo(pRawInputDeviceList[i].hDevice,
RIDI_DEVICEINFO,
&rdiDeviceInfo,
&nBufferSize);
// Got All Buffer?
if (nResult < 0)
{
// Error
cout << "ERR: Unable to read Device Info.. Moving to next device." << endl << endl;
// Next
continue;
}
// Mouse
if (rdiDeviceInfo.dwType == RIM_TYPEMOUSE)
{
// Current Device
int id = rdiDeviceInfo.mouse.dwId; //device id
string s = "ID: " + std::to_string(id) + ", Type : MOUSE"; //device type is mouse
DeviceList.insert(s);
}
// Keyboard
else if (rdiDeviceInfo.dwType == RIM_TYPEKEYBOARD)
{
// Current Device
cout << endl << "Displaying device " << i + 1 << " information. (KEYBOARD)" << endl;
wcout << L"Name " << wcDeviceName << endl; //*Problem is here!* //
cout << "Keyboard mode: " << rdiDeviceInfo.keyboard.dwKeyboardMode << endl;
cout << "Number of function keys: " << rdiDeviceInfo.keyboard.dwNumberOfFunctionKeys << endl;
cout << "Number of indicators: " << rdiDeviceInfo.keyboard.dwNumberOfIndicators << endl;
cout << "Number of keys total: " << rdiDeviceInfo.keyboard.dwNumberOfKeysTotal << endl;
cout << "Type of the keyboard: " << rdiDeviceInfo.keyboard.dwType << endl;
cout << "Subtype of the keyboard: " << rdiDeviceInfo.keyboard.dwSubType << endl;
}
// Some HID
else // (rdi.dwType == RIM_TYPEHID)
{
// Current Device
cout << endl << "Displaying device " << i + 1 << " information. (HID)" << endl;
wcout << L"Device Name: " << wcDeviceName << endl;
cout << "Vendor Id:" << rdiDeviceInfo.hid.dwVendorId << endl;
cout << "Product Id:" << rdiDeviceInfo.hid.dwProductId << endl;
cout << "Version No:" << rdiDeviceInfo.hid.dwVersionNumber << endl;
cout << "Usage for the device: " << rdiDeviceInfo.hid.usUsage << endl;
cout << "Usage Page for the device: " << rdiDeviceInfo.hid.usUsagePage << endl;
}
// Delete Name Memory!
delete[] wcDeviceName;
}
// Clean Up - Free Memory
delete[] pRawInputDeviceList;
for (std::set<string>::iterator i = DeviceList.begin(); i != DeviceList.end(); ++i)
std::cout << *i << '\n';
// Exit
cout << endl << "Finnished.";
cin.get();
return 0;
}
答案 0 :(得分：0)
在Windows中，有两种API调用：Unicode和ANSI。前者接收并返回UTF-16编码的Unicode字符串；后者接受并返回8位编码的字符串（确切的编码取决于操作系统的本地化）。
通过＃定义（或不＃定义）宏UNICODE选择要使用的风味。取决于函数更改名称的后缀为W或A。
#ifdef UNICODE
#define GetRawInputDeviceInfo GetRawInputDeviceInfoW
#else
#define GetRawInputDeviceInfo GetRawInputDeviceInfoA
#endif
所有可能包含文本数据的结构也都使用后缀W或A复制。
现在，您的问题是：您没有定义UNICODE，因此实际上是在调用GetRawInputDeviceInfoA()（一种需要char*的ANSI风格），但是您正在传递WCHAR* ，这是一个UNICODE字符串！
解决方案很简单：
char* wcDeviceName = new char[nBufferSize + 1];
不幸的是，此函数GetRawInputDeviceInfo()的参数已重载，因此它被声明为采用void*，因此编译器无法捕获该错误。如果您要调用一个简单的函数，请说SetWindowText()，则由于指针类型不兼容，您将遇到编译器错误。
如果您确实想要设备的完整UNICODE名称，则可能更喜欢保留WCHAR字符串，然后专门调用UNICODE函数：
WCHAR* wcDeviceName = new WCHAR[nBufferSize + 1];
...
GetRawInputDeviceInfoW(..., RIDI_DEVICENAME, wcDeviceName, ...);