form1.cs

一个分割合并文件的程序

using System ;
using System.Drawing ;
using System.Collections ;
using System.ComponentModel ;
using System.Windows.Forms ;
using System.Data ;
using System.IO ;
using System.Text  ;
using System.Data.OleDb   ;
using System.Windows.Forms.Design ;


namespace 文件分割
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button button1 ;
		private System.Windows.Forms.Label label1 ;
		private System.Windows.Forms.ComboBox comboBox1 ;
		private System.Windows.Forms.Label label2 ;
		private System.Windows.Forms.TextBox textBox1 ;
		private System.Windows.Forms.Button button2 ;
		private System.Windows.Forms.OpenFileDialog openFileDialog1 ;
		private System.Windows.Forms.TextBox textBox2 ;
		private System.Windows.Forms.Label label3 ;
		private System.Windows.Forms.ProgressBar progressBar1 ;
		private System.Windows.Forms.Label label4 ;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null ;

		public Form1 ( ) 
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent ( )  ;

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose (  bool disposing  ) 
		{
			if (  disposing  ) 
			{
				if  ( components != null )  
				{
					components.Dispose ( )  ;
				}
			}
			base.Dispose (  disposing  )  ;
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent ( ) 
		{
			this.button1 = new System.Windows.Forms.Button ( )  ;
			this.label1 = new System.Windows.Forms.Label ( )  ;
			this.comboBox1 = new System.Windows.Forms.ComboBox ( )  ;
			this.label2 = new System.Windows.Forms.Label ( )  ;
			this.textBox1 = new System.Windows.Forms.TextBox ( )  ;
			this.button2 = new System.Windows.Forms.Button ( )  ;
			this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog ( )  ;
			this.textBox2 = new System.Windows.Forms.TextBox ( )  ;
			this.label3 = new System.Windows.Forms.Label ( )  ;
			this.progressBar1 = new System.Windows.Forms.ProgressBar ( )  ;
			this.label4 = new System.Windows.Forms.Label ( )  ;
			this.SuspendLayout ( )  ;
			this.button1.Enabled = false ;
			this.button1.FlatStyle = System.Windows.Forms.FlatStyle.Flat ;
			this.button1.Location = new System.Drawing.Point ( 121 , 127 )  ;
			this.button1.Name = "button1" ;
			this.button1.Size = new System.Drawing.Size ( 68 , 36 )  ;
			this.button1.TabIndex = 0 ;
			this.button1.Text = "执行" ;
			this.button1.Click += new System.EventHandler ( this.button1_Click )  ;
			this.label1.Location = new System.Drawing.Point ( 26 , 91 )  ;
			this.label1.Name = "label1" ;
			this.label1.Size = new System.Drawing.Size ( 91 , 23 )  ;
			this.label1.TabIndex = 1 ;
			this.label1.Text = "请选择大小：" ;
			this.comboBox1.Items.AddRange ( new object[] {
			   "720" ,
			   "1440" ,
			   "2880"} )  ;
			this.comboBox1.Location = new System.Drawing.Point ( 102 , 88 )  ;
			this.comboBox1.Name = "comboBox1" ;
			this.comboBox1.Size = new System.Drawing.Size ( 113 , 21 )  ;
			this.comboBox1.TabIndex = 2 ;
			this.comboBox1.Text = "1440" ;
			this.comboBox1.SelectedIndexChanged += new System.EventHandler ( this.comboBox1_SelectedIndexChanged )  ;
			this.label2.Location = new System.Drawing.Point ( 26 , 19 )  ;
			this.label2.Name = "label2" ;
			this.label2.Size = new System.Drawing.Size ( 92 , 23 )  ;
			this.label2.TabIndex = 3 ;
			this.label2.Text = "请选择文件：" ;
			this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle ;
			this.textBox1.Location = new System.Drawing.Point ( 102 , 15 )  ;
			this.textBox1.Name = "textBox1" ;
			this.textBox1.Size = new System.Drawing.Size ( 156 , 20 )  ;
			this.textBox1.TabIndex = 4 ;
			this.textBox1.Text = "" ;
			this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Popup ;
			this.button2.Location = new System.Drawing.Point ( 263 , 14 )  ;
			this.button2.Name = "button2" ;
			this.button2.Size = new System.Drawing.Size ( 29 , 23 )  ;
			this.button2.TabIndex = 5 ;
			this.button2.Text = "..." ;
			this.button2.Click += new System.EventHandler ( this.button2_Click )  ;
			this.textBox2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle ;
			this.textBox2.Location = new System.Drawing.Point ( 102 , 50 )  ;
			this.textBox2.Name = "textBox2" ;
			this.textBox2.Size = new System.Drawing.Size ( 156 , 20 )  ;
			this.textBox2.TabIndex = 7 ;
			this.textBox2.Text = "" ;
			this.label3.Location = new System.Drawing.Point ( 16 , 55 )  ;
			this.label3.Name = "label3" ;
			this.label3.Size = new System.Drawing.Size ( 91 , 23 )  ;
			this.label3.TabIndex = 6 ;
			this.label3.Text = "输入存放目录：" ;
			this.progressBar1.Dock = System.Windows.Forms.DockStyle.Bottom ;
			this.progressBar1.Location = new System.Drawing.Point ( 0 , 185 )  ;
			this.progressBar1.Name = "progressBar1" ;
			this.progressBar1.Size = new System.Drawing.Size ( 321 , 23 )  ;
			this.progressBar1.TabIndex = 9 ;
			this.label4.Location = new System.Drawing.Point ( 222 , 91 )  ;
			this.label4.Name = "label4" ;
			this.label4.Size = new System.Drawing.Size ( 76 , 23 )  ;
			this.label4.TabIndex = 10 ;
			this.label4.Text = "（单位：K）" ;
			this.AutoScaleBaseSize = new System.Drawing.Size ( 5 , 13 )  ;
			this.ClientSize = new System.Drawing.Size ( 321 , 208 )  ;
			this.Controls.AddRange ( new System.Windows.Forms.Control[] {
			  this.label4 ,
			  this.progressBar1 ,
			  this.textBox2 ,
			  this.label3 ,
			  this.button2 ,
			  this.textBox1 ,
			  this.label2 ,
			  this.comboBox1 ,
			  this.label1 ,
			  this.button1} )  ;
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle ;
			this.MaximizeBox = false ;
			this.Name = "Form1" ;
			this.Text = "文件分割" ;
			this.ResumeLayout ( false )  ;
		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main ( )  
		{
			Application.Run ( new Form1 ( )  )  ;
		}
		/// <summary>
		/// 
		/// </summary>


		private void button1_Click ( object sender , System.EventArgs e ) 
		{
			int iFileSize= Int32.Parse  ( comboBox1.Text )  *1024 ;  
			//根据选择来设定分割的小文件的大小
			if ( Directory.Exists ( textBox2.Text ) )  
				Directory.Delete ( textBox2.Text ,true )  ; 
				//如果计算机存在存放分割文件的目录，则全部删除此目录所有文件
			Directory.CreateDirectory ( textBox2.Text )  ; 
				//反之则在计算机创建目录
			FileStream SplitFileStream=new FileStream ( textBox1.Text , FileMode.Open )  ;  
			//以文件的全路对应的字符串和文件打开模式来初始化FileStream文件流实例
			BinaryReader SplitFileReader=new BinaryReader ( SplitFileStream )  ; 
			//以FileStream文件流来初始化BinaryReader文件阅读器
			byte [ ] TempBytes ;  
			//每次分割读取的最大数据
			int iFileCount = ( int ) ( SplitFileStream.Length / iFileSize ) ;  
			//小文件总数
			progressBar1.Maximum = iFileCount ;
			if ( SplitFileStream.Length % iFileSize != 0 )  iFileCount++ ;
			string [ ] TempExtra = textBox1.Text.Split ( '.' )  ;
			/*  循环将大文件分割成多个小文件  */
			for ( int i = 1 ; i <= iFileCount ; i++ ) 
			{
				string sTempFileName = textBox2.Text + @"\"+i.ToString ( ) .PadLeft ( 4 ,'0' ) + "." + TempExtra[ TempExtra.Length - 1 ] ;  //小文件名
				//确定小文件的文件名称
				FileStream TempStream = new FileStream ( sTempFileName , FileMode.OpenOrCreate )  ;
				//根据文件名称和文件打开模式来初始化FileStream文件流实例
				BinaryWriter TempWriter = new BinaryWriter ( TempStream )  ;  
				//以FileStream实例来创建、初始化BinaryWriter书写器实例
				TempBytes = SplitFileReader.ReadBytes ( iFileSize )  ;       
				//从大文件中读取指定大小数据
				TempWriter.Write ( TempBytes )  ; 
				//把此数据写入小文件
				TempWriter.Close ( )  ;    
				//关闭书写器，形成小文件
				TempStream.Close ( )  ;  
				//关闭文件流
				progressBar1.Value = i - 1 ;

			}
			SplitFileReader.Close ( )  ;    
			//关闭大文件阅读器
			SplitFileStream.Close ( )  ;   
			MessageBox.Show  ( "分割成功!" )  ;
			progressBar1.Value = 0 ;
		}

		private void button2_Click ( object sender , System.EventArgs e ) 
		{
			openFileDialog1.Title = "请选择要分割的文件名称" ;
			System.Windows.Forms.DialogResult drTemp = openFileDialog1.ShowDialog  ( )  ;
			if  ( drTemp == DialogResult.OK && openFileDialog1.FileName != string.Empty  ) 
			{
				textBox1.Text = openFileDialog1.FileName  ;
				button1.Enabled = true ;
			}
			
		}

		private void button3_Click ( object sender , System.EventArgs e ) 
		{
			//openFileDialog1.Title ="请选择文件夹" ;
		}

		private void comboBox1_SelectedIndexChanged ( object sender , System.EventArgs e ) 
		{
		
		}
	}
}