C# USB打印机 打印

public static class UsbPrinterResolver
{

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
private struct SP_DEVINFO_DATA
{
public uint cbSize;
public Guid ClassGuid;
public uint DevInst;
public IntPtr Reserved;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
private struct SP_DEVICE_INTERFACE_DATA
{
public uint cbSize;
public Guid InterfaceClassGuid;
public uint Flags;
public IntPtr Reserved;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto, Pack = 1)]
private struct SP_DEVICE_INTERFACE_DETAIL_DATA  // Only used for Marshal.SizeOf. NOT!
{
public uint cbSize;
public char DevicePath;
}

[DllImport("cfgmgr32.dll", CharSet = CharSet.Auto, SetLastError = false, ExactSpelling = true)]
private static extern uint CM_Get_Parent(out uint pdnDevInst, uint dnDevInst, uint ulFlags);

[DllImport("cfgmgr32.dll", CharSet = CharSet.Auto, SetLastError = false)]
private static extern uint CM_Get_Device_ID(uint dnDevInst, string Buffer, uint BufferLen, uint ulFlags);

[DllImport("cfgmgr32.dll", CharSet = CharSet.Auto, SetLastError = false, ExactSpelling = true)]
private static extern uint CM_Get_Device_ID_Size(out uint pulLen, uint dnDevInst, uint ulFlags);

[DllImport("setupapi.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr SetupDiGetClassDevs([In(), MarshalAs(UnmanagedType.LPStruct)] System.Guid ClassGuid, string Enumerator, IntPtr hwndParent, uint Flags);

[DllImport("setupapi.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern int SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, uint MemberIndex, ref SP_DEVINFO_DATA DeviceInfoData);

[DllImport("setupapi.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern int SetupDiEnumDeviceInterfaces(IntPtr DeviceInfoSet, [In()] ref SP_DEVINFO_DATA DeviceInfoData, [In(), MarshalAs(UnmanagedType.LPStruct)] System.Guid InterfaceClassGuid, uint MemberIndex, ref SP_DEVICE_INTERFACE_DATA DeviceInterfaceData);

[DllImport("setupapi.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern int SetupDiGetDeviceInterfaceDetail(IntPtr DeviceInfoSet, [In()] ref SP_DEVICE_INTERFACE_DATA DeviceInterfaceData, IntPtr DeviceInterfaceDetailData, uint DeviceInterfaceDetailDataSize, out uint RequiredSize, IntPtr DeviceInfoData);

[DllImport("setupapi.dll", CharSet = CharSet.Auto, SetLastError = true, ExactSpelling = true)]
private static extern int SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);

[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
private static extern IntPtr CreateFile(string lpFileName, uint dwDesiredAccess, int dwShareMode, IntPtr lpSecurityAttributes, int dwCreationDisposition, int dwFlagsAndAttributes, IntPtr hTemplateFile);

private const uint DIGCF_PRESENT = 0x00000002U;
private const uint DIGCF_DEVICEINTERFACE = 0x00000010U;
private const int ERROR_INSUFFICIENT_BUFFER = 122;
private const uint CR_SUCCESS = 0;

private const int FILE_SHARE_READ = 1;
private const int FILE_SHARE_WRITE = 2;
private const uint GENERIC_READ = 0x80000000;
private const uint GENERIC_WRITE = 0x40000000;
private const int OPEN_EXISTING = 3;

private static readonly Guid GUID_PRINTER_INSTALL_CLASS = new Guid(0x4d36e979, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18);
private static readonly Guid GUID_DEVINTERFACE_USBPRINT = new Guid(0x28d78fad, 0x5a12, 0x11D1, 0xae, 0x5b, 0x00, 0x00, 0xf8, 0x03, 0xa8, 0xc2);
private static readonly IntPtr INVALID_HANDLE_VALUE = new IntPtr(-1);

private static string GetPrinterRegistryInstanceID(string PrinterName)
{
if (string.IsNullOrEmpty(PrinterName)) throw new ArgumentNullException("PrinterName");

const string key_template = @"SYSTEM\CurrentControlSet\Control\Print\Printers\{0}\PNPData";

using (var hk = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(
string.Format(key_template, PrinterName),
Microsoft.Win32.RegistryKeyPermissionCheck.Default,
System.Security.AccessControl.RegistryRights.QueryValues
)
)
{

if (hk == null) throw new ArgumentOutOfRangeException("PrinterName", "This printer does not have PnP data.");

return (string)hk.GetValue("DeviceInstanceId");
}
}

private static string GetPrinterParentDeviceId(string RegistryInstanceID)
{
if (string.IsNullOrEmpty(RegistryInstanceID)) throw new ArgumentNullException("RegistryInstanceID");

IntPtr hdi = SetupDiGetClassDevs(GUID_PRINTER_INSTALL_CLASS, RegistryInstanceID, IntPtr.Zero, DIGCF_PRESENT);
if (hdi.Equals(INVALID_HANDLE_VALUE)) throw new System.ComponentModel.Win32Exception();

try
{
SP_DEVINFO_DATA printer_data = new SP_DEVINFO_DATA();
printer_data.cbSize = (uint)Marshal.SizeOf(typeof(SP_DEVINFO_DATA));

if (SetupDiEnumDeviceInfo(hdi, 0, ref printer_data) == 0) throw new System.ComponentModel.Win32Exception();   // Only one device in the set

uint cmret = 0;

uint parent_devinst = 0;
cmret = CM_Get_Parent(out parent_devinst, printer_data.DevInst, 0);
if (cmret != CR_SUCCESS) throw new Exception(string.Format("Failed to get parent of the device '{0}'. Error code: 0x{1:X8}", RegistryInstanceID, cmret));

uint parent_device_id_size = 0;
cmret = CM_Get_Device_ID_Size(out parent_device_id_size, parent_devinst, 0);
if (cmret != CR_SUCCESS) throw new Exception(string.Format("Failed to get size of the device ID of the parent of the device '{0}'. Error code: 0x{1:X8}", RegistryInstanceID, cmret));

parent_device_id_size++;  // To include the null character

string parent_device_id = new string('\0', (int)parent_device_id_size);
cmret = CM_Get_Device_ID(parent_devinst, parent_device_id, parent_device_id_size, 0);
if (cmret != CR_SUCCESS) throw new Exception(string.Format("Failed to get device ID of the parent of the device '{0}'. Error code: 0x{1:X8}", RegistryInstanceID, cmret));

return parent_device_id;
}
finally
{
SetupDiDestroyDeviceInfoList(hdi);
}
}

private static string GetUSBInterfacePath(string SystemDeviceInstanceID)
{
if (string.IsNullOrEmpty(SystemDeviceInstanceID)) throw new ArgumentNullException("SystemDeviceInstanceID");

IntPtr hdi = SetupDiGetClassDevs(GUID_DEVINTERFACE_USBPRINT, SystemDeviceInstanceID, IntPtr.Zero, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
if (hdi.Equals(INVALID_HANDLE_VALUE)) throw new System.ComponentModel.Win32Exception();

try
{
SP_DEVINFO_DATA device_data = new SP_DEVINFO_DATA();
device_data.cbSize = (uint)Marshal.SizeOf(typeof(SP_DEVINFO_DATA));

if (SetupDiEnumDeviceInfo(hdi, 0, ref device_data) == 0) throw new System.ComponentModel.Win32Exception();  // Only one device in the set

SP_DEVICE_INTERFACE_DATA interface_data = new SP_DEVICE_INTERFACE_DATA();
interface_data.cbSize = (uint)Marshal.SizeOf(typeof(SP_DEVICE_INTERFACE_DATA));

if (SetupDiEnumDeviceInterfaces(hdi, ref device_data, GUID_DEVINTERFACE_USBPRINT, 0, ref interface_data) == 0) throw new System.ComponentModel.Win32Exception();   // Only one interface in the set

// Get required buffer size
uint required_size = 0;
SetupDiGetDeviceInterfaceDetail(hdi, ref interface_data, IntPtr.Zero, 0, out required_size, IntPtr.Zero);

int last_error_code = Marshal.GetLastWin32Error();
if (last_error_code != ERROR_INSUFFICIENT_BUFFER) throw new System.ComponentModel.Win32Exception(last_error_code);

IntPtr interface_detail_data = Marshal.AllocCoTaskMem((int)required_size);

try
{

// FIXME, don't know how to calculate the size.
// See http://stackoverflow.com/questions/10728644/properly-declare-sp-device-interface-detail-data-for-pinvoke 
switch (IntPtr.Size)
{
case 4:
Marshal.WriteInt32(interface_detail_data, 4 + Marshal.SystemDefaultCharSize);
break;
case 8:
Marshal.WriteInt32(interface_detail_data, 8);
break;

default:
throw new NotSupportedException("Architecture not supported.");
}

if (SetupDiGetDeviceInterfaceDetail(hdi, ref interface_data, interface_detail_data, required_size, out required_size, IntPtr.Zero) == 0) throw new System.ComponentModel.Win32Exception();

// TODO: When upgrading to .NET 4, replace that with IntPtr.Add
return Marshal.PtrToStringAuto(new IntPtr(interface_detail_data.ToInt64() + Marshal.OffsetOf(typeof(SP_DEVICE_INTERFACE_DETAIL_DATA), "DevicePath").ToInt64()));

}
finally
{
Marshal.FreeCoTaskMem(interface_detail_data);
}
}
finally
{
SetupDiDestroyDeviceInfoList(hdi);
}
}

public static string GetUSBPath(string PrinterName)
{
return GetUSBInterfacePath(GetPrinterParentDeviceId(GetPrinterRegistryInstanceID(PrinterName)));
}

public static Microsoft.Win32.SafeHandles.SafeFileHandle OpenUSBPrinter(string PrinterName)
{
return new Microsoft.Win32.SafeHandles.SafeFileHandle(CreateFile(GetUSBPath(PrinterName), GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero), true);
}
//using (var sh = UsbPrinterResolver.OpenUSBPrinter("Zebra Large"))
//{
//    using (var f = new System.IO.FileStream(sh, System.IO.FileAccess.ReadWrite))
//    {
//        // Read from and write to the stream f
//    }
//}
}