网络打印

using System ;

using System.Drawing ;

using System.Collections ;

using System.ComponentModel ;

using System.Windows.Forms ;

using System.Data ;

using System.IO ;

using System.Drawing.Printing ; 

public class Form1 : Form

{ private RichTextBox richTextBox1 ;

private Button button1 ;

private Button button2 ;

private Button button3 ;

private Button button4 ;

private Button button5 ;

private OpenFileDialog openFileDialog1 ;

private SaveFileDialog saveFileDialog1 ;

private PrintDialog printDialog1 ;

private PrintDocument ThePrintDocument ;

private PrintPreviewDialog printPreviewDialog1 ;

private StringReader myReader ;

private System.ComponentModel.Container components = null ;

public Form1 ( )

{ //初始化窗体中的各个组件

InitializeComponent ( ) ;

} //清除程序中使用多的资源

protected override void Dispose ( bool disposing )

{ if ( disposing )

{ if ( components != null ) 

{ components.Dispose ( ) ;

} }

base.Dispose ( disposing ) ;

} private void InitializeComponent ( )

{ richTextBox1 = new RichTextBox ( ) ;

button1 = new Button ( ) ;

button2 = new Button ( ) ;

button3 = new Button ( ) ;

button4 = new Button ( ) ;

button5 = new Button ( ) ;

saveFileDialog1 = new SaveFileDialog ( ) ;

openFileDialog1 = new OpenFileDialog ( ) ;

printPreviewDialog1 = new PrintPreviewDialog ( ) ;

printDialog1 = new PrintDialog ( ) ;

ThePrintDocument = new PrintDocument ( ) ;

ThePrintDocument.PrintPage += new PrintPageEventHandler ( ThePrintDocument_PrintPage ) ;

SuspendLayout ( ) ;

richTextBox1.Anchor = AnchorStyles.None ;

richTextBox1.Name = "richTextBox1" ;

richTextBox1.Size = new Size ( 448 , 280 ) ;

richTextBox1.TabIndex = 0 ;

richTextBox1.Text = "" ;

button1.Anchor = AnchorStyles.None ;

button1.Location = new Point ( 41 , 289 ) ;

button1.Name = "button1" ;

button1.Size = new Size ( 48 , 30 ) ;

button1.TabIndex = 1 ;

button1.Text = "打开" ;

button1.Click += new System.EventHandler ( button1_Click ) ;

button2.Anchor = AnchorStyles.None ;

button2.Location = new Point ( 274 , 288 ) ;

button2.Name = "button2" ;

button2.Size = new Size ( 48 , 30 ) ;

button2.TabIndex = 4 ;

button2.Text = "预览" ;

button2.Click += new System.EventHandler ( button2_Click ) ;

button3.Anchor = AnchorStyles.None ;

button3.Location = new Point ( 108 , 288 ) ;

button3.Name = "button3" ;

button3.Size = new Size ( 48 , 30 ) ;

button3.TabIndex = 2 ;

button3.Text = "保存" ;

button3.Click += new System.EventHandler ( button3_Click ) ;

button4.Anchor = AnchorStyles.None ;

button4.Location = new Point ( 174 , 288 ) ;

button4.Name = "button4" ;

button4.Size = new Size ( 80 , 30 ) ;

button4.TabIndex = 3 ;

button4.Text = "打印机设置" ;

button4.Click += new System.EventHandler ( button4_Click ) ;

button5.Anchor = AnchorStyles.None ;

button5.Location = new Point ( 345 , 288 ) ;

button5.Name = "button5" ;

button5.Size = new Size ( 48 , 30 ) ;

button5.TabIndex = 5 ;

button5.Text = "打印" ;

button5.Click += new System.EventHandler ( button5_Click ) ;

saveFileDialog1.DefaultExt = "*.txt" ;

saveFileDialog1.FileName = "file.txt" ;

saveFileDialog1.InitialDirectory = "c:\\" ;

saveFileDialog1.Title = "另存为！" ;

openFileDialog1.DefaultExt = "*.txt" ;

openFileDialog1.FileName = "file.txt" ;

openFileDialog1.InitialDirectory = "c:\\" ;

openFileDialog1.Title = "打开文本文件！" ;

AutoScaleBaseSize = new Size ( 6 , 14 ) ;

ClientSize = new Size ( 448 , 325 ) ;

this.Controls.Add ( button1 ) ;

this.Controls.Add ( button2 ) ;

this.Controls.Add ( button3 ) ;

this.Controls.Add ( button4 ) ;

this.Controls.Add ( button5 ) ;

this.Controls.Add ( richTextBox1 ) ;

this.MaximizeBox = false ;

this.Name = "Form1" ;

this.Text = "C＃来操作文本文件" ;

this.ResumeLayout ( false ) ;

} static void Main ( ) 

{ Application.Run ( new Form1 ( ) ) ;

} 

private void button1_Click ( object sender , System.EventArgs e )

{ try

{ if ( openFileDialog1.ShowDialog ( ) == DialogResult.OK )

{ FileStream fs = new FileStream ( openFileDialog1.FileName , FileMode.Open , FileAccess.Read ) ;

StreamReader m_streamReader = new StreamReader ( fs ) ; 

//使用StreamReader类来读取文件

m_streamReader.BaseStream.Seek ( 0 , SeekOrigin.Begin ) ;

// 从数据流中读取每一行，直到文件的最后一行，并在richTextBox1中显示出内容

this.richTextBox1.Text = "" ;

string strLine = m_streamReader.ReadLine ( ) ;

while ( strLine != null )

{ this.richTextBox1.Text += strLine + "\n" ;

strLine = m_streamReader.ReadLine ( ) ;

} //关闭此StreamReader对象

m_streamReader.Close ( ) ;

} 

} catch ( Exception em )

{ Console.WriteLine ( em.Message.ToString ( ) ) ;

} 

} 

private void button3_Click ( object sender , System.EventArgs e )

{ try

{ //获得另存为的文件名称

if ( saveFileDialog1.ShowDialog ( ) == DialogResult.OK )

{ 

//创建一个文件流，用以写入或者创建一个StreamWriter

FileStream fs = new FileStream ( @saveFileDialog1.FileName , FileMode.OpenOrCreate , FileAccess.Write ) ;

StreamWriter m_streamWriter = new StreamWriter ( fs ) ;

m_streamWriter.Flush ( ) ;

// 使用StreamWriter来往文件中写入内容

m_streamWriter.BaseStream.Seek ( 0 , SeekOrigin.Begin ) ;

// 把richTextBox1中的内容写入文件

m_streamWriter.Write ( richTextBox1.Text ) ;

//关闭此文件

m_streamWriter.Flush ( ) ;

m_streamWriter.Close ( ) ;

} }

catch ( Exception em )

{ Console.WriteLine ( em.Message.ToString ( ) ) ;

} }

private void button4_Click ( object sender , System.EventArgs e )

{ printDialog1.Document = ThePrintDocument ;

printDialog1.ShowDialog ( ) ;

} //预览打印文档

private void button2_Click ( object sender , System.EventArgs e )

{ try

{ string strText = richTextBox1.Text ;

myReader = new StringReader ( strText ) ;

PrintPreviewDialog printPreviewDialog1 = new PrintPreviewDialog ( ) ;

printPreviewDialog1.Document = ThePrintDocument ;

printPreviewDialog1.FormBorderStyle = FormBorderStyle.Fixed3D ;

printPreviewDialog1.ShowDialog ( ) ;

} catch ( Exception exp )

{ Console.WriteLine ( exp.Message.ToString ( ) ) ;

} }

//打印richTextBox1中的内容

private void button5_Click ( object sender , System.EventArgs e )

{ printDialog1.Document = ThePrintDocument ;

string strText = richTextBox1.Text ;

myReader = new StringReader ( strText ) ;

if ( printDialog1.ShowDialog ( ) == DialogResult.OK )

{ ThePrintDocument.Print ( ) ;

} }

protected void ThePrintDocument_PrintPage ( object sender , PrintPageEventArgs ev )

{ float linesPerPage = 0 ;

float yPosition = 0 ;

int count = 0 ;

float leftMargin = ev.MarginBounds.Left ;

float topMargin = ev.MarginBounds.Top ;

string line = null ;

Font printFont = richTextBox1.Font ;

SolidBrush myBrush = new SolidBrush ( Color.Black ) ;

//计算每一页打印多少行 

linesPerPage = ev.MarginBounds.Height / printFont.GetHeight ( ev.Graphics ) ;

//重复使用StringReader对象 ,打印出richTextBox1中的所有内容

while ( count < linesPerPage && ( ( line = myReader.ReadLine ( ) ) != null ) ) 

{ // 计算出要打印的下一行所基于页面的位置

yPosition = topMargin + ( count * printFont.GetHeight ( ev.Graphics ) ) ;

// 打印出richTextBox1中的下一行内容

ev.Graphics.DrawString ( line , printFont , myBrush , leftMargin , yPosition , new StringFormat ( ) ) ;

count++ ;

} // 判断如果还要下一页，则继续打印

if ( line != null )

ev.HasMorePages = true ;

else

ev.HasMorePages = false ;

myBrush.Dispose ( ) ;

} }