我正在尝试为允许“现金抽屉”附件的销售点系统编写代码。手册中提供了用于打开钱箱的代码(在 C++ 中使用 IOCTL)。由于我在 C# .NET 中编码,是否可以在 C# 中执行类似的操作,或者我是否必须编写一些非托管代码?
我可以从 C# 中获得“\\.\ADVANSYS”的句柄吗?我需要使用 DLLImport 吗?
如果有人能指出我正确的方向,将不胜感激。
// IOCTL Codes
#define GPD_TYPE 56053
#define ADV_OPEN_CTL_CODE CTL_CODE(GPD_TYPE, 0x920, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define ADV_STATUS_CTL_CODE CTL_CODE(GPD_TYPE, 0x900, METHOD_BUFFERED, FILE_ANY_ACCESS)
void OpenDrawer(UCHAR uWhichDrawer) // uWhichDrawer = 1 => CD#1, uWhichDrawer = 2 => CD#2
{
HANDLE hFile;
BOOL bRet
UCHAR uDrawer = uWhichDrawer;
// Open the driver
hFile = CreateFile(TEXT("\\\\.\\ADVSYS"),
GENERIC_WRITE | GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if (m_hFile == INVALID_HANDLE_VALUE)
{
AfxMessageBox("Unable to open Cash Drawer Device Driver!");
return;
}
// Turn on the Cash Drawer Output (Fire the required solenoid)
bRet = DeviceIoControl(hFile, ADV_CD_OPEN_CTL_CODE,
&uDrawer, sizeof(uDrawer),
NULL, 0,
&ulBytesReturned, NULL);
if (bRet == FALSE || ulBytesReturned != 1)
{
AfxMessageBox("Failed to write to cash drawer driver");
CloseHandle(hFile);
return;
}
CloseHandle(hFile);
}