C# 小票打印机 直接打印 无需驱动2009-07-11 10:53
class LPTControl
{
#region API函数
[StructLayout(LayoutKind.Sequential)]
private struct OVERLAPPED
{
int Internal;
int InternalHigh;
int Offset;
int OffSetHigh;
int hEvent;
}
[DllImport("kernel32.dll")]
private static extern int CreateFile(string lpFileName, uint dwDesiredAccess, int dwShareMode,
int lpSecurityAttributes, int dwCreationDisposition, int dwFlagsAndAttributes, int hTemplateFile);
[DllImport("kernel32.dll")]
private static extern bool WriteFile(int hFile, byte[] lpBuffer, int nNumberOfBytesToWrite,
out int lpNumberOfBytesWritten, out OVERLAPPED lpOverlapped);
[DllImport("kernel32.dll")]
private static extern bool CloseHandle(int hObject);
#endregion
public enum HorPos { Left, Center, Right }
private int iHandle;
private int ColWidth = 32;
public bool Open()
{
iHandle = CreateFile("LPT1", 0x40000000, 0, 0, 3, 0, 0);
if (iHandle != -1)
{
return true;
}
else
{
return false;
}
}
public bool Write(string Data)
{
try
{
if (iHandle != -1)
{
int i;
OVERLAPPED x;
byte[] bData = System.Text.Encoding.Default.GetBytes(Data);
return WriteFile(iHandle, bData, bData.Length, out i, out x);
}
else
{
return false;
}
}
catch { return false; }
}
public bool Write(byte[] bdata)
{
if (bdata.Length == 0) return false;
if (iHandle != -1)
{
int i;
OVERLAPPED x;
return WriteFile(iHandle, bdata, bdata.Length, out i, out x);
}
else
{
return false;
}
}
public bool WriteLine(string Data)
{
bool Result = Write(Data);
if (Result) Result = NewRow();
return Result;
}
public bool WriteLine(string Data, HorPos horpos)
{
int Length = Encoding.Default.GetBytes(Data).Length;
if (Length > ColWidth || HorPos.Left == horpos) return WriteLine(Data);
switch (horpos)
{
case HorPos.Center:
Data = Data.PadLeft(Length + (ColWidth - Length) / 2 - (Length - Data.Length), ' ');
break;
case HorPos.Right:
Data = Data.PadLeft(ColWidth - (Length - Data.Length), ' ');
break;
default:
break;
}
return WriteLine(Data);
}
public bool Close()
{
return CloseHandle(iHandle);
}
public bool PrintLine()
{
return WriteLine("================================");
}
public bool PrintDate()
{
return WriteLine("打印时间：" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
}
public bool NewRow()
{
bool Result = Write(new byte[] { 27, 10, 13 });
return Result;
}
public bool NewRow(int iRow)
{
bool Result = false;
for (int i = 0; i < iRow; i++)
{
Result = NewRow();
if (!Result) break;
}
return Result;
}
public bool CutPaper()
{
NewRow(5);
return Write(new byte[] { 27, 105 });
}
}
public class Printer
{
#region 预定义类型
[FlagsAttribute]
public enum PrinterEnumFlags
{
PRINTER_ENUM_DEFAULT = 0x00000001,
PRINTER_ENUM_LOCAL = 0x00000002,
PRINTER_ENUM_CONNECTIONS = 0x00000004,
PRINTER_ENUM_FAVORITE = 0x00000004,
PRINTER_ENUM_NAME = 0x00000008,
PRINTER_ENUM_REMOTE = 0x00000010,
PRINTER_ENUM_SHARED = 0x00000020,
PRINTER_ENUM_NETWORK = 0x00000040,
PRINTER_ENUM_EXPAND = 0x00004000,
PRINTER_ENUM_CONTAINER = 0x00008000,
PRINTER_ENUM_ICONMASK = 0x00ff0000,
PRINTER_ENUM_ICON1 = 0x00010000,
PRINTER_ENUM_ICON2 = 0x00020000,
PRINTER_ENUM_ICON3 = 0x00040000,
PRINTER_ENUM_ICON4 = 0x00080000,
PRINTER_ENUM_ICON5 = 0x00100000,
PRINTER_ENUM_ICON6 = 0x00200000,
PRINTER_ENUM_ICON7 = 0x00400000,
PRINTER_ENUM_ICON8 = 0x00800000,
PRINTER_ENUM_HIDE = 0x01000000
}
[StructLayout(LayoutKind.Sequential)]
public struct PRINTER_INFO_2
{
[MarshalAs(UnmanagedType.LPTStr)]
public string pServerName;
[MarshalAs(UnmanagedType.LPTStr)]
public string pPrinterName;
[MarshalAs(UnmanagedType.LPTStr)]
public string pShareName;
[MarshalAs(UnmanagedType.LPTStr)]
public string pPortName;
[MarshalAs(UnmanagedType.LPTStr)]
public string pDriverName;
[MarshalAs(UnmanagedType.LPTStr)]
public string pComment;
[MarshalAs(UnmanagedType.LPTStr)]
public string pLocation;
public IntPtr pDevMode;
[MarshalAs(UnmanagedType.LPTStr)]
public string pSepFile;
[MarshalAs(UnmanagedType.LPTStr)]
public string pPrintProcessor;
[MarshalAs(UnmanagedType.LPTStr)]
public string pDatatype;
[MarshalAs(UnmanagedType.LPTStr)]
public string pParameters;
public IntPtr pSecurityDescriptor;
public uint Attributes;
public uint Priority;
public uint DefaultPriority;
public uint StartTime;
public uint UntilTime;
public uint Status;
public uint cJobs;
public uint AveragePPM;
}
#endregion
#region 引用 WindowsAPI
//引用API声明
[DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool EnumPrinters(PrinterEnumFlags Flags, string Name, uint Level,
IntPtr pPrinterEnum, uint cbBuf, ref uint pcbNeeded,
ref uint pcReturned);
#endregion
public static string[] GetPrinter()
{
string[] Result = null;
PRINTER_INFO_2[] printInfo;
printInfo = EnumPrinters(PrinterEnumFlags.PRINTER_ENUM_LOCAL);
if (printInfo != null && printInfo.Length >= 0)
{
Result = new string[printInfo.Length];
for (int i = 0; i < printInfo.Length; i++)
{
Result[i] = printInfo[i].pPrinterName;
}
}
return Result;
}
#region 托管代码
/// <summary>
/// 遍历打印机
/// </summary>
/// <param name="Flags"></param>
/// <returns></returns>
public static PRINTER_INFO_2[] EnumPrinters(PrinterEnumFlags Flags)
{
PRINTER_INFO_2[] Info2 = null;
uint cbNeeded = 0;
uint cReturned = 0;
bool ret = EnumPrinters(Flags, null, 2, IntPtr.Zero, 0, ref cbNeeded, ref cReturned);
IntPtr pAddr = Marshal.AllocHGlobal((int)cbNeeded);
ret = EnumPrinters(Flags, null, 2, pAddr, cbNeeded, ref cbNeeded, ref cReturned);
if(ret)
{
Info2 = new PRINTER_INFO_2[cReturned];
int offset = pAddr.ToInt32();
for (int i = 0; i < cReturned; i++)
{
Info2[i] = (PRINTER_INFO_2)Marshal.PtrToStructure(new IntPtr(offset), typeof(PRINTER_INFO_2));
offset += Marshal.SizeOf(typeof(PRINTER_INFO_2));
}
Marshal.FreeHGlobal(pAddr);
}
return Info2;
}
#endregion
}
调用代码：
//不用驱动的话，不判断是否存在打印机。
if (Printer.GetPrinter() == null || Printer.GetPrinter().Length == 0)
{
State = "没有找到合适的打印机...";
return;
}
State = "正在打印...";
try
{
LPTControl lpt = new LPTControl();
lpt.Open();
lpt.WriteLine("数据头标题", LPTControl.HorPos.Center);
lpt.WriteLine("数据副标题", LPTControl.HorPos.Center);
lpt.PrintLine();
string StrTitle = " 列名1 ";
StrTitle += " 列名2 ";
lpt.WriteLine(StrTitle);
for (int i = 0; i < DSCount.Tables[0].Rows.Count; i++)
{
lpt.WriteLine(DSCount.Tables[0].Rows[i][0].ToString()
+ DSCount.Tables[0].Rows[i][1].ToString().PadLeft(11, ' '));
}
lpt.NewRow();
lpt.WriteLine("合计:".PadRight(8, ' ') + LabCount.Text.PadLeft(11, ' '));
lpt.PrintLine();
lpt.PrintDate();
lpt.CutPaper();
lpt.Close();
System.Threading.Thread.Sleep(500);
State = "打印完成...";
}
catch (Exception Ex)
{
State = "打印出错...";
WriteLog("打印出错:" + Ex.Message);
}
如果没有安装打印机驱动程序，调用的时候，一定要保证打印机联机。
适用于56-58mm的纸
