C#小票打印机动态纸张尺寸

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Drawing.Printing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

 

namespace pdPrint

{

    public partial class Form1 : Form

    {

        private int lineSize;                //每行打印字数

        private List<string> textList;       //打印内容行

        private int lineHeight;              //打印行高

        private int fontSize;                //字大小

        public Form1()

        {

            lineSize = 20;                   //设置每行打印字数

            lineHeight = 22;                 //行高  1/100 英寸

            fontSize = 12;                   //字体大小 1/英寸

            InitializeComponent();

        }

 

        private void btn_Print_Click(object sender, EventArgs e)

        {

            if (string.IsNullOrWhiteSpace(this.txt_PrintText.Text))

            {

                return;

            }

 

            //原文字行或者段落内容

            var sourceTexts = this.txt_PrintText.Text.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);

 

            //重新把文字进行分行树立

            textList = new List<string>();

            foreach (var item in sourceTexts)

            {

                if (!string.IsNullOrWhiteSpace(item))

                {

                    if (item.Length > lineSize)

                    {

                        textList.AddRange(GetArr(lineSize, item));

                    }

                    else

                    {

                        textList.Add(item);

                    }

                }

            }

 

 

            PrintDocument pd = new PrintDocument();

            pd.PrintPage += new PrintPageEventHandler(Print_Content);

            //纸张设置默认

            PaperSize pageSize = new PaperSize("自定义纸张", fontSize * lineSize, (textList.Count * lineHeight));

            pd.DefaultPageSettings.PaperSize = pageSize;

            try

            {

                pd.Print();

            }

            catch (Exception ex)

            {

                MessageBox.Show("打印失败." + ex.Message);

            }

        }

 

        /// <summary>

        /// 打印内容事件

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void Print_Content(object sender, PrintPageEventArgs e)

        {

            var mark = 0;

            foreach (var item in textList)

            {

                e.Graphics.DrawString(item, new Font(new FontFamily("宋体"), fontSize), System.Drawing.Brushes.Black, 0, mark * lineSize);

                mark++;

            }

        }

 

        /// <summary>

        /// 根据内容进行分行

        /// </summary>

        /// <param name="linelen">每行字数</param>

        /// <param name="text">原文字行（段落）文字</param>

        /// <returns></returns>

        private List<string> GetArr(int linelen, string text)

        {

            var list = new List<string>();

            int listcount = text.Length % linelen == 0 ? text.Length / linelen : (text.Length / linelen) + 1;

            for (int j = 0; j < listcount; j++)

            {

                try

                {

                    list.Add(text.Substring(j * linelen, linelen));

                }

                catch (Exception)

                {

                    list.Add(text.Substring(j * linelen));

                }

            }

            return list;

        }

    }

}