初学者,照着书上的抄袭制作,但已经理解了里面的意思和应用,并且进行了稍微改善和异常捕捉。这里记录下,以防以后用到这方面的知识点。
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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); } } } }