using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace Winform

{

    /*

     在 Windows 窗体中进行打印主要包括以下两个方面：使用 PrintDocument 组件（Windows 窗体）组件来使用户可以打印；使用 PrintPreviewDialog 控件（Windows 窗体）控件、 PrintDialog 组件（Windows 窗体）组件和 PageSetupDialog 组件（Windows 窗体）组件向了解 Windows 操作系统的用户提供熟悉的图形界面

     * printdocument使用方法：1、创建；2、在printpage事件中写每一页的打印逻辑；3、调用print方法

     * printPreviewControl用法：1、创建；2、将document属性和printdocument关联；3、在printdocument的printpage事件里写打印逻辑；4、运行程序后会自动调用printpage事件;5、如果要刷新就用InvalidatePreview函数

     */

    public partial class UsageOfControl6 : Form

    {

        string documentContents;//总打印字符

        string stringToPrint;///要打印的

        public UsageOfControl6()

        {

            InitializeComponent();

            ///考虑printPreviewControl组件在初始化时就调用了printdocument的printpage事件，在这里初始化打印数据

            using (FileStream stream = new FileStream(@"d:\redist.txt", FileMode.Open))

            using (StreamReader reader = new StreamReader(stream))

            {

                documentContents = reader.ReadToEnd();

            }

            stringToPrint = documentContents;

        }

        private void UsageOfControl6_Load(object sender, EventArgs e)

        {

        }

        private void button1_Click(object sender, EventArgs e)

        {

            printPreviewDialog1.Document = printDocument1;//打印预览控件

            printDialog1.Document = printDocument1;//打印设置控件

            pageSetupDialog1.Document=printDocument1;//页面设置控件

            printPreviewControl1.Document = printDocument1;

            using (FileStream stream = new FileStream(@"d:\redist.txt", FileMode.Open))

            using (StreamReader reader = new StreamReader(stream))

            {

                documentContents = reader.ReadToEnd();

            }

            stringToPrint = documentContents;

            if (printDialog1.ShowDialog()==DialogResult.OK)///通过printDialog1来设置printdocument1的属性：打印机，打印页数，打印方向

            {

                pageSetupDialog1.ShowDialog();///打印纸设置，边距，页眉，纸大小，也可以在printDocument1_PrintPage事件中获取e.PageSettings来设置

                this.printPreviewDialog1.ShowDialog();///打印预览

                printDocument1.Print();

                printPreviewControl1.InvalidatePreview();////刷新，会再次调用printdocument的printpage事件

            }

        }

        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)

        {

            int charactersOnPage = ;

            int linesPerPage = ;

            // Sets the value of charactersOnPage to the number of characters

            // of stringToPrint that will fit within the bounds of the page.

            //算出stringToPrint铺满打印页时的打印行数和字符数

            e.Graphics.MeasureString(stringToPrint, this.Font,

                e.MarginBounds.Size, StringFormat.GenericTypographic,

                out charactersOnPage, out linesPerPage);

            // Draws the string within the bounds of the page.///打印本页文字

            ///除了打印文字还可以打印线条，图形，屏幕截图等，可以在批定的位置打

            e.Graphics.DrawString(stringToPrint, this.Font, Brushes.Black,

            e.MarginBounds, StringFormat.GenericTypographic);

            // Remove the portion of the string that has been printed.

            stringToPrint = stringToPrint.Substring(charactersOnPage);//下一页要打的

            // Check to see if more pages are to be printed.

            e.HasMorePages = (stringToPrint.Length > );///如果没有打印完就打印下一页，会自动调用这个事件来打印下一页

            // If there are no more pages, reset the string to be printed.

            if (!e.HasMorePages)

                stringToPrint = documentContents;

        }

        private void button2_Click(object sender, EventArgs e)

        {

            printPreviewControl1.StartPage += ;///下一页

        }

        private void button3_Click(object sender, EventArgs e)

        {

            printPreviewControl1.StartPage -= ;///上一页

        }

        private void button4_Click(object sender, EventArgs e)

        {

            printPreviewControl1.Zoom += 0.1;///放大

        }

        private void button5_Click(object sender, EventArgs e)

        {

            printPreviewControl1.Zoom -= 0.1;//缩小

        }

    }

}