【求 C# 打开钱箱代码】

Question

本帖最后由 oh_ku 于 2011-05-06 13:24:44 编辑

Answer 1

写入byte[]数据到打印机，怎么弄出这么多ToString？

Answer 2

[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);        #region 开钱箱
        /// <summary>
        /// 开钱箱
        /// </summary>
        public  void OpenDrawer()
        {
            try
            {
                IntPtr iHandle = CreateFile("LPT1", 0x40000000, 0, 0, 3, 0, 0);
                                if (iHandle.ToInt32() == -1)
                {
                    MessageBox.Show("没有连接打印机或者打印机端口未打开!", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }                else
                {
                    SafeFileHandle handle = new SafeFileHandle(iHandle, true);
                    FileStream fs = new FileStream(handle, FileAccess.ReadWrite);
                    StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.Default);
                    sw.Write(((char)27).ToString() + "p" + ((char)0).ToString() + ((char)60).ToString() + ((char)255).ToString());                    sw.Close();                    fs.Close();
                }
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
            }
        }
        #endregion

Answer 3

端口是串口COM1的，能不能用这个代码