Winform实现小票打印代码示例

（１）自定义纸张设置

     控制面板->打印机和传真->右键->服务器属性->创建新的格式

（２）自定义纸张使用

    this.printDocument1.DefaultPageSettings.PaperSize = new System.Drawing.Printing.PaperSize("NewPrint", iWidth, iHeight);

   NewPrint：制定一纸张名称。  iWidth：纸张使用宽度。  iHeight：纸张使用高度。

  iWidth，iHeight　可以在使用过程中调整。

  例如：iWidth=923，iHeight=480

（３）ESC/P指令使用

using System;
using System.Runtime.InteropServices;
using System.Data;
using System.IO;
using System.Windows.Forms;

namespace PrintDome
{
    class ClsPrintLPT
    {
        private IntPtr iHandle;
        private FileStream fs;
        private StreamWriter sw;

        private string prnPort = "LPT1";   //打印机端口

        public ClsPrintLPT()
        {

        }

        private const uint GENERIC_READ = 0x80000000;
        private const uint GENERIC_WRITE = 0x40000000;
        private const int OPEN_EXISTING = 3;

        /// <summary>
        /// 打开一个vxd(设备)
        /// </summary>
        [DllImport("kernel32.dll", EntryPoint = "CreateFile", CharSet = CharSet.Auto)]
        private static extern IntPtr CreateFile(string lpFileName, uint dwDesiredAccess, int dwShareMode, int lpSecurityAttributes,
                                                int dwCreationDisposition, int dwFlagsAndAttributes, int hTemplateFile);

        /// <summary>
        /// 开始连接打印机
        /// </summary>
        private bool PrintOpen()
        {
            iHandle = CreateFile(prnPort, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);

            if (iHandle.ToInt32() == -1)
            {
                MessageBox.Show("没有连接打印机或者打印机端口不是LPT1！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return false;
            }