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本篇內容主要講解“C#處理文本文件的方法”,感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷,實用性強。下面就讓小編來帶大家學習“C#處理文本文件的方法”吧!
用C#處理文本文件的完整源程序代碼(control.cs),現在就可以方便的得到用C#處理文本文件的一個完整的源程序,具體如下:
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 ( )
{
//初始化窗體中的各個組件
InitializeComponent ( ) ;
}
//清除程序中使用多的資源
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 = "打開" ;
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 = "預覽" ;
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 = "打印機設置" ;
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 = "另存為!" ;
openFileDialog1.DefaultExt = "*.txt" ;
openFileDialog1.FileName = "file.txt" ;
openFileDialog1.InitialDirectory = "c:\\" ;
openFileDialog1.Title = "打開文本文件!" ;
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#來操作文本文件" ;
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類來讀取文件
m_streamReader.BaseStream.Seek ( 0 , SeekOrigin.Begin ) ;
// 從數據流中讀取每一行,直到文件的***一行,并在richTextBox1中顯示出內容
this.richTextBox1.Text = "" ;
string strLine = m_streamReader.ReadLine ( ) ;
while ( strLine != null )
{
this.richTextBox1.Text += strLine + "\n" ;
strLine = m_streamReader.ReadLine ( ) ;
}
//關閉此StreamReader對象
m_streamReader.Close ( ) ;
}
}
catch ( Exception em )
{
Console.WriteLine ( em.Message.ToString ( ) ) ;
}
}
private void button3_Click ( object sender , System.EventArgs e )
{
try
{
//獲得另存為的文件名稱
if ( saveFileDialog1.ShowDialog ( ) == DialogResult.OK )
{
//創建一個文件流,用以寫入或者創建一個StreamWriter
FileStream fs = new FileStream ( @saveFileDialog1.FileName,
FileMode.OpenOrCreate , FileAccess.Write ) ;StreamWriter m_streamWriter = new StreamWriter ( fs ) ;
m_streamWriter.Flush ( ) ;
// 使用StreamWriter來往文件中寫入內容
m_streamWriter.BaseStream.Seek ( 0 , SeekOrigin.Begin ) ;
// 把richTextBox1中的內容寫入文件
m_streamWriter.Write ( richTextBox1.Text ) ;
//關閉此文件
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 ( ) ;
}
//預覽打印文檔
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中的內容
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 ) ;
//計算每一頁打印多少行
linesPerPage = ev.MarginBounds.Height / printFont.GetHeight ( ev.Graphics ) ;
//重復使用StringReader對象 ,打印出richTextBox1中的所有內容
while ( count < linesPerPage && ( ( line = myReader.ReadLine ( ) ) != null ) )
{
// 計算出要打印的下一行所基于頁面的位置
yPosition = topMargin + ( count * printFont.GetHeight ( ev.Graphics ) ) ;
// 打印出richTextBox1中的下一行內容
ev.Graphics.DrawString ( line , printFont , myBrush ,
leftMargin , yPosition , new StringFormat ( ) ) ;count++ ;
}
// 判斷如果還要下一頁,則繼續打印
if ( line != null )
ev.HasMorePages = true ;
else
ev.HasMorePages = false ;
myBrush.Dispose ( ) ;
}
}
本文雖然只是介紹了用C#處理文本文件,但其實對C#處理其他文件也有很多的參考價值,這是因為在名字空間"System.IO"中定義的用以處理其他文件的類的結構和用以處理文本文件的類的結構有很多是相同的。希望本文對你用C#進行文件方面的編程有所幫助。
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