高分求教打印机命令输出!!
厂商提供打印机切纸命令VB6.0实现
Print #1, Chr$(&H1B); Chr$(&H64); Chr$(&H0); '切纸命令
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//以下是C#向打印机输出命令
[DllImport( "Kernel32.dll ")]
static extern IntPtr CreateFile(
string filename,
[MarshalAs(UnmanagedType.U4)]FileAccess fileaccess,
[MarshalAs(UnmanagedType.U4)]FileShare fileshare,
int securityattributes,
[MarshalAs(UnmanagedType.U4)]FileMode creationdisposition,
int flags,
IntPtr template);
[DllImport( "kernel32.dll ")]
static extern bool CloseHandle(IntPtr hObject);
private void btncut_Click(object sender, EventArgs e)
{
try
{
SafeFileHandle sfh = null;
IntPtr ptr = CreateFile( "PRN ", FileAccess.Write, FileShare.Write, 0, FileMode.Open, 0, IntPtr.Zero);
sfh = new SafeFileHandle(ptr, true);
StreamWriter sw = new StreamWriter(new FileStream(sfh, FileAccess.Write));
string Instruction = null;
Instruction = Convert.ToChar(27) + Instruction + Convert.ToChar(100) + Instruction + Convert.ToChar(0);
byte[] buffer = System.Text.Encoding.Default.GetBytes(Instruction);
sw.WriteLine(打印机命令); ------------如何填写?
sw.Close();