public partial class PrintFileForm : Form     {         public PrintFileForm()         {             InitializeComponent();             PrintFile prinFile = new PrintFile();             prinFile.Print();         }     }

class PrintFile     {         StreamReader sr = null;         Font printFont = new Font("宋体", 12);         public void Print()         {             try             {                 sr = new StreamReader(@"F:\Temp.txt");                 try                 {                     PrintDocument printDoc = new PrintDocument();                     printDoc.PrintPage += printDoc_PrintPage;                     printDoc.Print();                 }                 finally                 {                     sr.Close();                 }             }             catch (Exception ex)             {                 Console.WriteLine(ex.Message);             }         }         void printDoc_PrintPage(object sender, PrintPageEventArgs e)         {             string line = null;             //设置一页的行数=打印区域的高度除以字体高度.             float pageLine = e.MarginBounds.Height / printFont.GetHeight(e.Graphics);             //循环打印每一行             for (int count = 0; count < pageLine && ((line=sr.ReadLine())!=null); count++)             {                 float singleLine=e.MarginBounds.Top+(count*printFont.GetHeight(e.Graphics));                 e.Graphics.DrawString(line, printFont, Brushes.Black, e.MarginBounds.Left, singleLine);             }             //判断是否继续打印             if (line != null)                 e.HasMorePages = true;             else                 e.HasMorePages = false;         }     }