using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using System.IO; using System.Threading; namespace CopyProgress015 { public partial class Form1 : Form {     public Form1()     {  InitializeComponent();     }     private Thread thdCopyFile; //创建一个线程     private string str = "";  //用来记录源文件的名字     FileStream FormerOpenStream;  //实例化源文件FileStream类     FileStream ToFileOpenStream;  //实例化目标文件FileStream类     #region //复制文件 函数     /// <summary>     /// 复制文件     /// </summary>     /// <param name="FormerFile">源文件路径</param>     /// <param name="ToFile">目的文件路径</param>     /// <param name="TranSize">传输大小</param>     /// <param name="progressBar1">ProgressBar控件</param>     public void CopyFile(string FormerFile, string ToFile, int TranSize, ProgressBar progressBar1)     {  progressBar1.Value = 0;//设置进度条的当前位置为0  progressBar1.Minimum = 0; //设置进度条的最小值为0  try  {      FormerOpenStream = new FileStream(FormerFile, FileMode.Open, FileAccess.Read);//以只读方式打开源文件  }  catch (IOException ex)  {      MessageBox.Show(ex.Message);      return;  }  try  {      FileStream fileToCreate = new FileStream(ToFile, FileMode.Create); //创建目的文件，如果已存在将被覆盖      fileToCreate.Close();//关闭所有fileToCreate的资源      fileToCreate.Dispose();//释放所有fileToCreate的资源  }  catch(IOException ex)  {      MessageBox.Show(ex.Message);      return;  }        ToFileOpenStream = new FileStream(ToFile, FileMode.Append, FileAccess.Write);//以写方式打开目的文件        int max = Convert.ToInt32(Math.Ceiling((Double)FormerOpenStream.Length / (Double)TranSize));//根据一次传输的大小，计算最大传输个数. Math.Ceiling 方法 (Double),返回大于或等于指定的双精度浮点数的最小整数值。  progressBar1.Maximum = max;//设置进度条的最大值  int FileSize; //每次要拷贝的文件的大小  if (TranSize < FormerOpenStream.Length)  //如果分段拷贝，即每次拷贝内容小于文件总长度  {      byte[] buffer = new byte[TranSize]; //根据传输的大小，定义一个字节数组，用来存储传输的字节      int copied = 0;//记录传输的大小      int tem_n = 1;//设置进度栏中进度的增加个数      while (copied <= ((int)FormerOpenStream.Length - TranSize))      {   FileSize = FormerOpenStream.Read(buffer, 0, TranSize);//从0开始读到buffer字节数组中，每次最大读TranSize   FormerOpenStream.Flush();   //清空缓存   ToFileOpenStream.Write(buffer, 0, TranSize); //向目的文件写入字节   ToFileOpenStream.Flush();//清空缓存   ToFileOpenStream.Position = FormerOpenStream.Position; //是源文件的目的文件流的位置相同   copied += FileSize; //记录已经拷贝的大小   progressBar1.Value = progressBar1.Value + tem_n; //增加进度栏的进度块      }      int leftSize = (int)FormerOpenStream.Length - copied; //获取剩余文件的大小      FileSize = FormerOpenStream.Read(buffer, 0, leftSize); //读取剩余的字节      FormerOpenStream.Flush();      ToFileOpenStream.Write(buffer, 0, leftSize); //写入剩余的部分      ToFileOpenStream.Flush();  }  else //如果整体拷贝，即每次拷贝内容大于文件总长度  {      byte[] buffer = new byte[FormerOpenStream.Length];      FormerOpenStream.Read(buffer, 0, (int)FormerOpenStream.Length);      FormerOpenStream.Flush();      ToFileOpenStream.Write(buffer, 0, (int)FormerOpenStream.Length);      ToFileOpenStream.Flush();  }  FormerOpenStream.Close();  ToFileOpenStream.Close();  if (MessageBox.Show("copy finished") == DialogResult.OK)  {      progressBar1.Value = 0;      txtOriginalFile.Clear();      txtCopyFile.Clear();      str = "";  }     }     #endregion       public delegate void CopyFile_Delegate(); //定义委托/托管线程     /// <summary>     /// 在线程上执行委托（设置托管线程函数）     /// </summary>     public void SetCopyFile()     {  //this.Invoke(new CopyFile_Delegate(RunCopyFile)); //对指定的线程进行托管  //下面两行代码等同上面一行代码  CopyFile_Delegate copyfile_delegate = new CopyFile_Delegate(RunCopyFile); //创建delegate对象  this.Invoke(copyfile_delegate); //调用delegate                }     /// <summary>     /// 设置线程，运行copy文件，它与代理CopyFile_Delegate应具有相同的参数和返回类型     /// </summary>     public void RunCopyFile()     {  CopyFile(txtOriginalFile.Text, txtCopyFile.Text + "\\" + str, 1024, progressBar1); //复制文件  Thread.Sleep(0); //避免假死  thdCopyFile.Abort();  //关闭线程     }     private void btnOriginalFile_Click(object sender, EventArgs e)     {  if (openFileDialog1.ShowDialog() == DialogResult.OK)  //打开文件对话框  {      txtOriginalFile.Text = openFileDialog1.FileName;  //获取源文件的路径  }     }     private void btnCopyFile_Click(object sender, EventArgs e)     {  if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)  {      txtCopyFile.Text = folderBrowserDialog1.SelectedPath;//获取目的文件的路径                }     }     private void btnBeginToCopy_Click(object sender, EventArgs e)     {                     if (txtOriginalFile.Text.Trim() == string.Empty)  {      MessageBox.Show("OriginalFile cannot be empty!");      return;  }  else  {      str = txtOriginalFile.Text;//记录源文件的路径      str = str.Substring(str.LastIndexOf('\\') + 1, str.Length - str.LastIndexOf('\\') - 1); //获取源文件的名称  }  if (txtCopyFile.Text.Trim() == string.Empty)  {      MessageBox.Show("The Copyfile path cannot be empty!");      return;  }  else  {      thdCopyFile = new Thread(new ThreadStart(SetCopyFile));      thdCopyFile.Start();  }                 }     /// <summary>     /// 给textbox增加tooltip     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     private void txtOriginalFile_MouseHover(object sender, EventArgs e)     {  ToolTip tooltip = new ToolTip();  if (txtOriginalFile.Text.Trim() != string.Empty)  {      tooltip.Show(txtOriginalFile.Text, txtOriginalFile);  }  else  {      tooltip.Hide(txtOriginalFile);  }     }     /// <summary>     /// 给textbox增加tooltip     /// </summary>     /// <param name="sender"></param>     /// <param name="e"></param>     private void txtCopyFile_MouseHover(object sender, EventArgs e)     {  ToolTip tooltip = new ToolTip();  if (txtCopyFile.Text.Trim() != string.Empty)  {      tooltip.Show(txtCopyFile.Text, txtCopyFile);  }  else  {      tooltip.Hide(txtCopyFile);  }     } } }