高分求并口读写实例！！！！！！！
最好是测试过的。
并口~
[解决办法]
不能直接对并口操作的，需要一个DLL,这里你能下到,http://www.logix4u.net/inpout32.htm
下面是我写的代码，刚学C#,写的很乱....
IO.cs
///////////////////////////////////////////////////
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
namespace WindowsApplication1
{
class IO
{
[DllImport( "inpout32.dll ", EntryPoint = "Out32 ")]
public static extern void Output(int adress, int value);
[DllImport( "inpout32.dll ", EntryPoint = "Inp32 ")]
public static extern int Input(int adress);
}
}
////////////////////////////////////////////////
Form1.cs
/////////////////////////////////////////////////
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private bool key,kEnter;
private void button2_Click(object sender, EventArgs e)
{
IO.Output(int.Parse(textBox1.Text, System.Globalization.NumberStyles.AllowHexSpecifier), int.Parse(textBox2.Text, System.Globalization.NumberStyles.AllowHexSpecifier));
}
private void button1_Click(object sender, EventArgs e)
{
int a;
a=IO.Input(int.Parse(textBox1.Text, System.Globalization.NumberStyles.AllowHexSpecifier));
textBox2.Text = a.ToString( "X ");
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
if (key==true )
e.Handled = true;
if (kEnter == true)
{
button1.Focus();
SendKeys.Send( "{ENTER} ");
kEnter = false;
}
}
private void textBox2_KeyPress(object sender, KeyPressEventArgs e)
{
if (key == true)
e.Handled = true;
if (kEnter == true)
{
button2.Focus();
SendKeys.Send( "{ENTER} ");
kEnter = false;
}
}
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
key = false;
if (e.KeyCode < Keys.D0 || e.KeyCode > Keys.D9)
{
if (e.KeyCode < Keys.NumPad0 || e.KeyCode > Keys.NumPad9)
{
if (e.KeyCode != Keys.Back && e.KeyCode != Keys.Enter && e.KeyCode != Keys.A && e.KeyCode != Keys.B && e.KeyCode != Keys.C && e.KeyCode != Keys.D && e.KeyCode != Keys.E && e.KeyCode != Keys.F)
{
key = true;
}
}
}
if (e.KeyCode == Keys.Enter)
kEnter = true;
}
private void textBox2_KeyDown(object sender, KeyEventArgs e)
{
key = false;
if (e.KeyCode < Keys.D0 || e.KeyCode > Keys.D9)
{
if (e.KeyCode < Keys.NumPad0 || e.KeyCode > Keys.NumPad9)
{
if (e.KeyCode != Keys.Back && e.KeyCode != Keys.Enter && e.KeyCode != Keys.A && e.KeyCode != Keys.B && e.KeyCode != Keys.C && e.KeyCode != Keys.D && e.KeyCode != Keys.E && e.KeyCode != Keys.F)
{
key = true;
}
}
}
if (e.KeyCode == Keys.Enter)
kEnter = true;
}
}
}
////////////////////////////////////////////////
[解决办法]
public class RawPrinterHelper
{
// Structure and API declarions:
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public class DOCINFOA
{
[MarshalAs(UnmanagedType.LPStr)]
public string pDocName;
[MarshalAs(UnmanagedType.LPStr)]
public string pOutputFile;
[MarshalAs(UnmanagedType.LPStr)]
public string pDataType;
}
[DllImport( "winspool.Drv ", EntryPoint = "OpenPrinterA ", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool OpenPrinter([MarshalAs(UnmanagedType.LPStr)] string szPrinter, out IntPtr hPrinter, IntPtr pd);
[DllImport( "winspool.Drv ", EntryPoint = "ClosePrinter ", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool ClosePrinter(IntPtr hPrinter);
[DllImport( "winspool.Drv ", EntryPoint = "StartDocPrinterA ", SetLastError = true, CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool StartDocPrinter(IntPtr hPrinter, Int32 level, [In, MarshalAs(UnmanagedType.LPStruct)] DOCINFOA di);
[DllImport( "winspool.Drv ", EntryPoint = "EndDocPrinter ", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool EndDocPrinter(IntPtr hPrinter);
[DllImport( "winspool.Drv ", EntryPoint = "StartPagePrinter ", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool StartPagePrinter(IntPtr hPrinter);
[DllImport( "winspool.Drv ", EntryPoint = "EndPagePrinter ", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool EndPagePrinter(IntPtr hPrinter);
[DllImport( "winspool.Drv ", EntryPoint = "WritePrinter ", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
public static extern bool WritePrinter(IntPtr hPrinter, IntPtr pBytes, Int32 dwCount, out Int32 dwWritten);
// SendBytesToPrinter()
// When the function is given a printer name and an unmanaged array
// of bytes, the function sends those bytes to the print queue.
// Returns true on success, false on failure.
public static bool SendBytesToPrinter(string szPrinterName, IntPtr pBytes, Int32 dwCount)
{
Int32 dwError = 0, dwWritten = 0;
IntPtr hPrinter = new IntPtr(0);
DOCINFOA di = new DOCINFOA();
bool bSuccess = false; // Assume failure unless you specifically succeed.
di.pDocName = "My C#.NET RAW Document ";
di.pDataType = "RAW ";
// Open the printer.
if (OpenPrinter(szPrinterName.Normalize(), out hPrinter, IntPtr.Zero))
{
// Start a document.
if (StartDocPrinter(hPrinter, 1, di))
{
// Start a page.
if (StartPagePrinter(hPrinter))
{
// Write your bytes.
bSuccess = WritePrinter(hPrinter, pBytes, dwCount, out dwWritten);
EndPagePrinter(hPrinter);
}
EndDocPrinter(hPrinter);
}
ClosePrinter(hPrinter);
}
// If you did not succeed, GetLastError may give more information
// about why not.
if (bSuccess == false)
{
dwError = Marshal.GetLastWin32Error();
}
return bSuccess;
}
public static bool SendFileToPrinter(string szPrinterName, string szFileName)
{
bool bSuccess = false;
try
{
// Open the file.
System.IO.FileStream fs = new FileStream(szFileName, FileMode.Open,FileAccess.Read, FileShare.ReadWrite);
// Create a BinaryReader on the file.
BinaryReader br = new BinaryReader(fs);
// Dim an array of bytes big enough to hold the file 's contents.
Byte[] bytes = new Byte[fs.Length];
// Your unmanaged pointer.
IntPtr pUnmanagedBytes = new IntPtr(0);
int nLength;
nLength = Convert.ToInt32(fs.Length);
// Read the contents of the file into the array.
bytes = br.ReadBytes(nLength);
// Allocate some unmanaged memory for those bytes.
pUnmanagedBytes = Marshal.AllocCoTaskMem(nLength);
// Copy the managed byte array into the unmanaged array.
Marshal.Copy(bytes, 0, pUnmanagedBytes, nLength);
// Send the unmanaged bytes to the printer.
bSuccess = SendBytesToPrinter(szPrinterName, pUnmanagedBytes, nLength);
// Free the unmanaged memory that you allocated earlier.
Marshal.FreeCoTaskMem(pUnmanagedBytes);
}
catch(Exception e)
{
MessageBox.Show(Convert.ToString(e));
}
return bSuccess;
}
public static bool SendStringToPrinter(string szPrinterName, string szString)
{
IntPtr pBytes;
Int32 dwCount;
// How many characters are in the string?
dwCount = szString.Length;
// Assume that the printer is expecting ANSI text, and then convert
// the string to ANSI text.
pBytes = Marshal.StringToCoTaskMemAnsi(szString);
// Send the converted ANSI string to the printer.
SendBytesToPrinter(szPrinterName, pBytes, dwCount);
Marshal.FreeCoTaskMem(pBytes);
return true;
}
}
