调用系统API函数直接连接pos打印机打印代码,CSharp代码库,德仔网

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【CSharp】调用系统API函数直接连接pos打印机打印
作者:Dezai.CN / 发布于2011/9/13/ 777
<div>
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
/// <summary>
/// PrintPos 的摘要说明
/// </summary>
public class PrintPos
{

private FileStream fs = null;
[DllImport("kernel32.dll")]//调用系统API打印函数
public static extern IntPtr CreateFile
(
string FileName, // file name
uint DesiredAccess, // access mode
uint ShareMode, // share mode
uint SecurityAttributes, // Security Attributes
uint CreationDisposition, // how to create
uint FlagsAndAttributes, // file attributes
int hTemplateFile // handle to template file

);

public PrintPos()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
/// <summary>
/// 开始打印，本地打印机ltp1 端口打印 调用方法：PrintPos.PrintPage("dsdfdsfdsfsdfdsfsdfdsfs");
/// </summary>
/// <param name="strPos"></param>
/// <returns></returns>
public string PrintPage(string strPos)
{
IntPtr iHandle = CreateFile("LPT1", 0x40000000, 0, 0, 3, 0, 0);
//判断是否连接上打印机 -1为false
if (iHandle.ToInt32() == -1)
{
return "没有连接到打印机";
}
else
{
fs = new FileStream(iHandle, FileAccess.ReadWrite);
//StreamReader sr = new StreamReader(fs);
StreamWriter sw = new StreamWriter(fs, Encoding.Default);
sw.WriteLine(strPos, 0, 500);
sw.Close();
fs.Close();
return "已经成功连接打印机";
}
}
}

*******************************************************************************************************


using System.IO; 
using System.Runtime.InteropServices; 
using System.Text; 

namespace WindowsApplication2 
{ 
/// <summary> 
///POSPrinter的摘要说明。 
/// </summary> 
public class POSPrinter 
{ 
const int OPEN_EXISTING=3; 
string prnPort="COM1"; 
[DllImport("kernel32.dll",CharSet=CharSet.Auto)] 

private static extern IntPtr CreateFile( 
string lpFileName, 
int dwDesiredAccess, 
int dwShareMode, 
int lpSecurityAttributes, 
int dwCreationDisposition, 
int dwFlagsAndAttributes, 
int hTemplateFile); 

public POSPrinter() 
{ 
// 
//TODO:在此处添加构造函数逻辑 
// 
} 
public POSPrinter(string prnPort) 
{ 
this.prnPort=prnPort;//打印机端口 
} 
public string PrintLine(string str) 
{ 
IntPtr iHandle=CreateFile(prnPort,0x40000000,0,0,OPEN_EXISTING,0,0); 
if(iHandle.ToInt32()==-1) 
{ 
return"没有连接打印机"; 
} 
else 
{ 
FileStream fs=new FileStream(iHandle,FileAccess.ReadWrite); 
StreamWriter sw=new StreamWriter(fs,System.Text.Encoding.UTF8);//写数据 
sw.WriteLine(str); 
//开钱箱 
//sw.WriteLine(Chr(&H1B)&Chr(70)&Chr(0)&Chr(20)&Chr(&HA0)) 
sw.Close(); 
fs.Close(); 
return""; 
} 
} 
} 
}

*********************************************************************************************************************
public class LPTControl 
{ 
[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, 
ref int lpNumberOfBytesWritten, 
ref OVERLAPPED lpOverlapped 
); 
[DllImport("kernel32.dll")] 
private static extern bool CloseHandle( 
int hObject 
); 
private int iHandle; 
public bool Open() 
{ 
iHandle=CreateFile("lpt1",0x40000000,0,0,3,0,0); 
if(iHandle !=-1) 
{ 
return true; 
} 
else 
{ 
return false; 
} 
} 
public bool Write(String Mystring) 
{ 
if(iHandle !=-1) 
{ 
int i; 
OVERLAPPED x; 
byte() mybyte=System.Text.Encoding.Default.GetBytes(Mystring); 
return WriteFile(iHandle,mybyte,mybyte.Length 
ref i,ref x); 
} 
else 
{ 
Throw new Exception("端口未打开!")； 
} 
} 
public bool Close() 
{ 
return CloseHandle(iHandle); 
} 
}


///////////////////////////////////////////////////////////////////////////// 
========================================== 
操作打印机端口的类 
======================================== 
using System; 
using System.Runtime.InteropServices; 
using System.IO; 
using System.Windows.Forms; 

namespace Printer 
{ 
/// <summary> 
/// POSPrinter 的摘要说明。 
/// </summary> 
public class POSPrinter 
{ 
const int OPEN_EXISTING = 3; 
string prnPort ="LPT1"; 
[DllImport("kernel32.dll", CharSet=CharSet.Auto)] 
private static extern IntPtr CreateFile(string lpFileName, 
int dwDesiredAccess, 
int dwShareMode, 
int lpSecurityAttributes, 
int dwCreationDisposition , 
int dwFlagsAndAttributes , 
int hTemplateFile); 

public POSPrinter() 
{ 
// 
// TODO: 在此处添加构造函数逻辑 
// 
} 
public POSPrinter(string prnPort) 
{ 
this.prnPort=prnPort;//打印机端口 
} 
/// <summary> 
/// 输出到打印机 
/// </summary> 
/// <param name="str"></param> 
/// <returns></returns> 

/// <summary> 
/// 输出到打印机 
/// </summary> 
/// <param name="str">要打印的内容</param> 
public void PrintLine(string str) 
{ 

IntPtr iHandle = CreateFile(prnPort, 0x40000000, 0, 0, OPEN_EXISTING, 0, 0); 
if(iHandle.ToInt32() == -1) 
{ 
} 
else 
{ 
FileStream fs = new FileStream(iHandle, FileAccess.ReadWrite); 
StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.Default); //写数据 
sw.WriteLine(str); 

sw.Close(); 
fs.Close(); 
} 
} 


/// <summary> 
/// 打开钱箱 
/// </summary> 
public void OpenCashBox() 
{ 
IntPtr iHandle = CreateFile(prnPort, 0x40000000, 0, 0, OPEN_EXISTING, 0, 0); 
if(iHandle.ToInt32() == -1) 
{ 
MessageBox.Show(iHandle.ToInt32().ToString()); 
} 
else 
{ 
FileStream fs = new FileStream(iHandle, FileAccess.ReadWrite); 
StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.Default); //写数据 

sw.Close(); 
fs.Close(); 

} 
} 

} 
} 
/////////////////////////////////////////////////////////////////////////////// 



/////////////////////////////////////////////////////////////////////////////// 
============================================ 
调用代码 
============================================ 
private void PrinterPrint() 
{ 
try 
{ 
OleDbConnection OleConn=new OleDbConnection(function.OleDbconn_Str()); 
OleConn.Open();//打开数据库 

Olesql="SELECT [TableStore].[StoreName] AS 商品名称, [TableStore].[SellNum] AS 数量, [TableStore].[GuestPrice] AS 单价, [TableStore].[SellNum]*[TableStore].[GuestPrice] AS 小记 FROM TableStore WHERE TableId=0 ORDER BY [TableStoreId] ASC"; 
OleDbDataAdapter da=new OleDbDataAdapter(Olesql,OleConn); 
DataTable dt=new DataTable(); 
DataSet ds=new DataSet(); 
da.Fill(ds); 

dt=ds.Tables[0]; 
OleConn.Close(); 


string[] s =new string [dt.DefaultView.Count]; 

posPrinter.PrintLine("**** 锦绣江南欢迎您的光临 ****"); 
posPrinter.PrintLine("交易时间："+DateTime.Now.ToString()); 
posPrinter.PrintLine("电话：123456789 123456789"); 
posPrinter.PrintLine("********************************"); 
for(int i=0;i<dt.DefaultView.Count;i++) 
{ 
posPrinter.PrintLine(dt.Rows[i]["商品名称"].ToString()+" "+dt.Rows[i]["数量"].ToString()+" "+dt.Rows[i]["单价"].ToString()+" "+dt.Rows[i]["小记"].ToString()); 
} 

posPrinter.PrintLine(PrintContent); 
posPrinter.PrintLine("********************************"); 
posPrinter.PrintLine("总计："+SUMMoney.ToString("F")); 
posPrinter.PrintLine("现金："+SKMoney.ToString("F")); 
posPrinter.PrintLine("找零："+找零.Text); 
posPrinter.PrintLine("　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　"); 
textBox1.Text=PrintContent; 
posPrinter.OpenCashBox(); 
} 
catch 
{ 
} 
}
</div>
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