1.窗体添加一个button

2.代码如下：

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Drawing.Printing; using System.Diagnostics; using System.IO; namespace printForm {     public partial class Form1 : Form     {         private string stringToPrint;         public Form1()         {             InitializeComponent();             this.printDocument1.PrintPage += new PrintPageEventHandler(this.myPrinter_PrintPage);         }         private void myPrinter_PrintPage(object sender, PrintPageEventArgs e)         {             int charactersOnPage = 0;             int linesPerPage = 0;             e.Graphics.MeasureString(stringToPrint, this.Font, e.MarginBounds.Size, StringFormat.GenericTypographic, out charactersOnPage, out linesPerPage);             e.Graphics.DrawString(stringToPrint, this.Font, Brushes.Black, e.MarginBounds, StringFormat.GenericTypographic);            }         private void button1_Click(object sender, EventArgs e)         {             this.printDocument1.DocumentName = "1";             FileStream fs = new FileStream(@"C:\\gyjw\\2013-4-27\\1.txt", FileMode.Open);             StreamReader sr = new StreamReader(fs, Encoding.GetEncoding("gb2312"));             stringToPrint = sr.ReadToEnd();             StandardPrintController spc = new StandardPrintController();             printDocument1.PrintController = spc;    //以上两行为去掉“正在打印”的窗体。             printDocument1.Print();             sr.Close();             fs.Close();         }     } }