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;//openfiledialog using System.IO;//文本處理namespace CutTxt {public partial class mainForm : Form{string fileLocation = "";//文件的位置long fileLenth = 0;//文件的大小（字節）int fileLines = 0;//文本內容的行數int setLines = 0;//自定義的行int page = 0;//分割的頁數public mainForm(){InitializeComponent();}//瀏覽按鈕的事件private void bt_browseFile_Click(object sender, EventArgs e){OpenFileDialog open1 = new OpenFileDialog();open1.InitialDirectory = "C:\\";open1.Filter = "文本文件 (*.txt)|*.txt|All files (*.*)|*.*";open1.FilterIndex = 1;open1.RestoreDirectory = false;if (open1.ShowDialog() == DialogResult.OK){fileLocation = open1.FileName;tb_fileLocation.Text = fileLocation;tb_lineNumber.Enabled = true;tb_lineNumber.Text = "0";fileLines = getTxtProperty(tb_fileLocation.Text);//獲取文件大小FileInfo file1 = new FileInfo(tb_fileLocation.Text);fileLenth = file1.Length;lb_txtProperty.Text = "文章段落數：【" + fileLines.ToString()+ "】 段，" + "文件大小：【" + fileLenth.ToString() + " 】字節。"; }}//分割按鈕的事件private void bt_cutFiles_Click(object sender, EventArgs e){if (tb_fileLocation.Text == ""){MessageBox.Show("請指定文件路徑！"); }else if (tb_lineNumber.Text == "0") {MessageBox.Show("請設置分割的行數！");}else{cutTxt(fileLocation, int.Parse(tb_lineNumber.Text)); }}//得到行數public int getTxtProperty(string fileLocation){StreamReader sr = new StreamReader(fileLocation);string aa = "";int bb = 0;while ((aa = sr.ReadLine()) != null){bb++; }return bb;}//開始分割public void cutTxt(string fileLocation, int lineNumbers){string [] recordLine = new string[fileLines];//定義行數大小的數組int ii = 0; string tmpLine = "";StreamReader sr = new StreamReader(fileLocation,Encoding.GetEncoding("gb2312"));while ((tmpLine = sr.ReadLine()) != null){recordLine[ii] = tmpLine;ii++;}//開始處理分割int curLine = 0;//工作行int curPage=0;//當前工作篇for (int p = 0; p < page-1; p++)//先寫前n篇，最后一篇單獨寫{StreamWriter sw = new StreamWriter("Xiangjun"+p+".txt", true, Encoding.GetEncoding("gb2312"));for (int j = curLine; j < curLine+setLines; j++){sw.Write(recordLine[j]);sw.Write("\r\n");//寫完一行后換行 }sw.Flush();sw.Close();curLine += setLines;curPage=p;//MessageBox.Show("當前索引：" + curLine+"當前page值："+curPage); }//寫最后一篇StreamWriter sw_Last = new StreamWriter("Xiangjun" + (curPage+1) + ".txt", true, Encoding.GetEncoding("gb2312"));for (int j = curLine; j < fileLines; j++){sw_Last.Write(recordLine[j]);sw_Last.Write("\r\n");//寫完一行后換行 //MessageBox.Show("當前索引：" + j); }sw_Last.Flush();sw_Last.Close();MessageBox.Show("分割成功！");}//當設置的行數更改時，記錄其數值//設置文本框失效事件，在form1.Designer.cs中private void tb_lineNumber_LostFocus(object sender, EventArgs e){//定義未使用 }private void tb_lineNumber_TextChanged(object sender, EventArgs e){setLines = int.Parse(tb_lineNumber.Text);if (setLines != 0){page = (fileLines / setLines) + 1;//獲取篇數lb_pageNum.Text = "您設置了【" + setLines + "】段為一頁，預計將產生【" + page + "】個文件。"; }else{lb_pageNum.Text = "無法設置0個段落！";}}private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e){System.Diagnostics.Process.Start("mailto:liuxiangjun@188.com");}} } View Code

實驗要求：
1. 能進行文件分割
2. 分割塊大小由用戶輸入決定
3. 能進行文件合并
4. 文件分割與合并過程用線程來實現
5. 數據緩沖區不得超過2K
6. 要有處理進度顯示

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.IO; using System.Threading;namespace WindowsFormsApplication1 {public partial class 文件分割器1 : Form{//時間：2012-9-6//作者：Olive//功能：實現大文件的分割、合并#region Members int count1,count,fgkDaXiao;FileInfo fFenGe,fHeBing;FileStream fStream,hStream;string fenGeLuJing,heBingLuJing;int value = 0;#endregion#region Methods public 文件分割器1(){InitializeComponent();skinEngine1.SkinFile = "WarmColor1.ssk";}/// <summary>/// 選擇要分割的文件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnfgwenjian_Click(object sender, EventArgs e){try{if (openFileDialog1.ShowDialog() == DialogResult.OK){fFenGe = new FileInfo(openFileDialog1.FileName);txtfenge.Text = fFenGe.FullName;fenGeLuJing = fFenGe.FullName.Substring(0, fFenGe.FullName.Length - openFileDialog1.SafeFileName.Length);txtwjdaxiao.Text = ((int)fFenGe.Length/1024).ToString();fStream = new FileStream(fFenGe.FullName, FileMode.Open, FileAccess.Read);}}catch{MessageBox.Show("文件分割異常，請檢查確認無誤后再次分割！"); }}/// <summary>/// 選擇要保存的路徑，如果不選默認為與原文件同路徑/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnfglujing_Click(object sender, EventArgs e){if (string.IsNullOrEmpty(txtfgkdaxiao.Text)){MessageBox.Show("請輸入文件分割塊大小！");}if (folderBrowserDialog1.ShowDialog() == DialogResult.OK){txtfglujing.Text= folderBrowserDialog1.SelectedPath;fenGeLuJing = folderBrowserDialog1.SelectedPath+"\\";}} /// <summary>/// 分割文件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnfenge_Click(object sender, EventArgs e){try{int wenJianLength = Convert.ToInt32(txtwjdaxiao.Text);if (wenJianLength % fgkDaXiao == 0){count = wenJianLength / fgkDaXiao;}else{count = wenJianLength / fgkDaXiao + 1;}for (int i = 0; i < count; i++){Thread thread = new Thread(new ParameterizedThreadStart(FenGe));thread.Start(i);}MessageBox.Show("文件分割完畢");}catch{MessageBox.Show("分割異常，請確認操作！");}}/// <summary>/// 分割線程調用函數/// </summary>/// <param name="i"></param>public void FenGe(object i){try{using (FileStream fgstream = new FileStream(fenGeLuJing + fFenGe.Name.Substring(0, fFenGe.Name.Length - fFenGe.Extension.Length) + i + fFenGe.Extension, FileMode.OpenOrCreate, FileAccess.Write)){byte[] buffer = new byte[fgkDaXiao * 1024];int data = 0;if ((data = fStream.Read(buffer, 0, buffer.Length)) > 0){BinaryWriter bWriter = new BinaryWriter(fgstream, Encoding.Default);bWriter.Write(buffer, 0, data);value=(int)i/count*100;progressBar1.Value = value;}}}catch{MessageBox.Show("文件打開異常！");}}/// <summary>/// 輸入值變化/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void txtfgkdaxiao_TextChanged(object sender, EventArgs e){if (txtfgkdaxiao.Text.Length > 0){fgkDaXiao = Convert.ToInt32(txtfgkdaxiao.Text);}}/// <summary>/// 選擇要合并的文件，首個分割文件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnhbwenjian_Click(object sender, EventArgs e){if (openFileDialog1.ShowDialog() == DialogResult.OK){fHeBing = new FileInfo(openFileDialog1.FileName);txthebing.Text = fHeBing.FullName;heBingLuJing = fHeBing.FullName.Substring(0, fHeBing.FullName.Length - openFileDialog1.SafeFileName.Length) + "\\";}}/// <summary>/// 選擇合并后的文件的保存路徑/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void btnhebinglujing_Click(object sender, EventArgs e){if (folderBrowserDialog1.ShowDialog() == DialogResult.OK){heBingLuJing = folderBrowserDialog1.SelectedPath + "\\";}}/// <summary>/// 合并文件/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button1_Click(object sender, EventArgs e){try{if (count1 > 0){using (hStream = new FileStream(heBingLuJing + fHeBing.Name.Substring(0, fHeBing.Name.Length - fHeBing.Extension.Length - 1) + fHeBing.Extension, FileMode.OpenOrCreate, FileAccess.Write)){for (int i = 0; i < count1; i++){Thread thread = new Thread(new ParameterizedThreadStart(HeBing));thread.Start(i);}MessageBox.Show("合并完成");}}else{MessageBox.Show("請輸入合并文件數目");}}catch{MessageBox.Show("合并異常，請重新合并");}} /// <summary>/// 求要合并的文件數/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void txthbkuaishu_TextChanged(object sender, EventArgs e){count1 = Convert.ToInt32(txthbkuaishu.Text);}/// <summary>/// 合并線程調用的合并函數，執行文件合并/// </summary>/// <param name="i"></param>public void HeBing(object i){using (FileStream readStream = new FileStream(fHeBing.FullName.Substring(0, fHeBing.FullName.Length - fHeBing.Extension.Length- 1) + i + fHeBing.Extension, FileMode.Open, FileAccess.Read)){byte[] buffer = new byte[readStream.Length];int data = 0;if ((data = readStream.Read(buffer, 0, buffer.Length)) > 0){BinaryWriter binary = new BinaryWriter(hStream, Encoding.Default);binary.Write(buffer, 0, data);}}}#endregion } }本文主要用到了FileStream、FileInfo類、BinaryWriter、StreamReader、StreamWriter等常用文件操作類，而且還用到了線程的知識，如果有不懂的地方，希望可以和我交流，共同學習進步 View Code

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轉載于:https://www.cnblogs.com/blogpro/p/11343909.html

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