如何在c#中实现将文本传到lpt1端口?

Question

在vb中可以直接 open "LPT1:" "string"
在c#中难道只能调用api?

Answer 1

reference:
http://www.codeproject.com/useritems/LPrintWriter.asp

Answer 2

多谢!!!
但是好像还是没能解决,再csdn上搜索lpt1的也出来很多类似的提问,但好像都没有彻底解决的反感

Answer 3

难道没有人知道么?
上次有人给我的只有这个调用API的方法...不知道能不能行
 ///////////////调用windows API封装成LPTControl类/////////////////
        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,
            out int lpNumberOfBytesWritten,
            out 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, out i, out x);
                }
                else
                {
                    throw new Exception("端口未打开!");
                }
            }
            public bool Close()
            {
                return CloseHandle(iHandle);
            }
        }

Answer 4

用上面的类好象并不能工作,是不是需要首先驱动打印机?
但是在cmd下直接用copy都可以把string传给打印机让其工作啊....是不是上面的类里面对于打印机的设置有不对的地方?